for AC DC EMU (S - WELCOME TO RDSOrdso.indianrailways.gov.in/works/uploads/File/Maintenance...Chapter 1 Maintenance Manual for AC DC EMU (Siemens) 1.6 UNIT & RAKE FORMATION OF EMU

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MAINTENANCE MANUAL for

AC – DC EMU (SIEMENS) TARGET GROUP : AC-DC EMU (SIEMENS) MAINTENANCE STAFF

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(For Official Use Only)

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INDEX

Chapter No. Description

1. GENERAL DESCRIPTION

2. AUXILIARY CONVERTER UNIT (ACU)

3. TRACTION CONVERTER CUBICLE

4. TRACTION MOTOR

5. TRACTION TRANSFORMER

6. OTHER ELECTRICAL EQUIPMENT

7. CONTROL SYSTEM (SIBAS 32)

8. BOGIE

9. SUSPENSION

10. BRAKE SYSTEM

11. PASSENGER AMMENITIES

12. MAINTENANCE SCHEDULES

13. ANNEXURE 1 - REFERENCE DRAWINGS

14. ANNEXURE 2 – MUST CHANGE ITEMS

CHAPTER 1

GENERAL DESCRIPTION

CONTENTS

S.No. Description Page No.

1.0 INTRODUCTION 01

1.1 ABBREVIATIONS 01

1.2 THREE-PHASE TECHNOLOGY 02

1.3 CONTROL TECHNOLOGY 03

1.4 DISPLAY SUPPORT 03

1.5 AUXILIARY EQUIPMENT 03

1.6 UNIT & RAKE FORMATION OF EMU 04

1.6.1 End Basic Unit 04

1.6.2 Middle Basic Unit 04

1.6.3 Train Formation 05

1.7 MAJOR EQUIPMENT OF DTC 05

1.7.1 Driving Cab 05

1.7.2 Indication Panels 07

1.7.3 Electronics Cabinet DTC 12

1.8 MAJOR EQUIPMENT OF MOTOR COACH 14

1.8.1 Shunting Cab 14

1.8.2 HT Compartment 15

1.8.3 Roof Equipment 17

1.8.4 Under Frame Equipment 17

1.8.5 Panel in Passenger Area of Motor Coach 17

1.9 ELECTRICAL EQUIPMENT IN MOTOR COACH 17

1.9.1 Pre-Charging AC Contactor 17

1.9.2 Pre-Charging DC Contactor 17

1.9.3 Traction Converter Cubical 18

1.9.4 Earth Fault Detector 18

1.9.5 Line Filter 18

1.9.6 Auxiliary Converter Unit 18

1.9.7 Pantograph (Type AM-1882) 18

1.9.8 Surge Arrestor 18

1.9.9 Line Voltage Transformer 19


1.9.10 Line Current Transformer 19

1.9.11 Voltage Sensing Device 19

1.9.12 Change Over Switch AC/DC 19

1.9.13 Braking Resister Rs 25.10 19

1.9.14 High Voltage AC Circuit Breaker (HVCB) 19

1.9.15 High Speed DC Circuit Breaker 19

1.9.16 AC Earthing Switch 19

1.9.17 DC Earthing Switch 19

1.9.18 Surge Arrestor AC 19

1.9.19 Surge Arrestor DC 19

1.9.20 Traction Motors 20

1.9.21 Traction Transformer 20

1.10 TRAILER COACH 20

1.10.1 Panel in Passenger Area of TC 20


1.10.3 Under Frame Equipments 20

1.11 NON DRIVING TRAILER COACH 20

1.11.1 Panel in Passenger Area of NDTC 20


1.11.3 Under Frame Equipments 20

1.12 TRANSDUCERS AND SENSORS 21

1.13 BRIEF DESCRIPTION OF HT POWER CIRCUIT 21

1.14 PANTOGRAPH CONTROL 24

1.15 MAIN CIRCUIT-BREAKER CONTROL 27

1.16 EARTHING SWITCH 28

1.17 EARTHING 29


Maintenance Manual for AC-DC EMU (Siemens) Chapter 1

1

CHAPTER 1

GENERAL DESCRIPTION

1.0 INTRODUCTION

The AC-DC EMU (Electrical Multiple Unit) is a newly designed train equipped

with state-of-art IGBT control technology. These trains are especially designed for

running over DC as well as AC territory in Mumbai sub-urban area to cater growing

demand of passenger traffic. These vehicles are equipped with a driver’s friendly

diagnostic display (MMI) unit.

This Maintenance Manual for AC-DC EMU (Siemens Rake) is prepared for the

use and reference for maintenance staff of EMU Car Sheds and Workshops. Maintenance

and overhauling procedures of various electrical, mechanical equipment and all other

accessories of Siemens Rake are briefly described in this manual.

1.1 ABBREVIATIONS

ACU - Auxiliary Control Unit

ADC/COS - AC/DC Changeover Switch

AFB - Automatic Traction/ Brake Control (Cruise Control

AM - Shut Off Valve (Parking Brake Circuit)

AWS - Auxiliary Warning System

BCU - Brake Control Unit

BW - Braking Resister

CCU - Central Control Unit

DCS - Driver’s control switch (Master key)

DM - Diagnostic Message

DTC Driving Trailer Coach

EBU - End Basic Unit

EBL - Emergency Brake Loop

ES - Electronic Cabinet

FML - Traction Motor Fan

GTO - Gate Turn Off Thyristor

HB - Main Air Compressor

HBL - Main MR Pipe

HL - Main Brake Pipe

HSCB - High Speed Circuit Breaker

HTC - High Tension Compartment

IGBT - Insulated Gate Bi-Polar Transistor

MBU - Middle Basic Unit

MMI - Man Machine Interface

MPS - Motor protective switch

MS - Main Switch


Chapter 1 Maintenance Manual for AC DC EMU (Siemens)

2

MVB - Multi Vehicle Bus

NDTC - Non Driving Trailer Coach

PBC - Power brake controller

PIS - Passenger Information System

PT - Potential Transformer

PTS - Position of Train System

RDM - Rescue Drive Mode

SB - Signal Bell

SC - Shunting Cab

SIBAS - Siemens Bahn Automatisierungs System

SKS - SIBAS KLIP Station.

SW - Software

TCC - Traction converter cabinet

TCU - Traction Control Unit

VCB - Vacuum Circuit Breaker

VSD - Voltage Sensing Device

VVVF - Variable Voltage Variable Frequency

1.2 THREE-PHASE TECHNOLOGY

The vehicle is equipped with a state-of-the-art three-phase drive with asynchronous

motor. The advantages over direct current drives are as follows:

Smooth (Step-less) acceleration.

Reduced weight

Wear-resistant drives hence less maintenance and high level of reliability as no

wearable part like carbon brushes and commutator.

Good starting properties

High tractive force over the whole speed range

Wear-free regenerative brake for reduced maintenance, increased wheel and other

mechanical component life and energy conservation as well

Easy starting even on gradients

The stator winding of the asynchronous motor consists of coils, which are

electrically offset by 120°. If these are connected to a three-phase network, they generate

a rotating magnetic field, also known as rotating field.

The rotor consists of one winding which is designed with rods whose ends are

short-circuited by means of rings. This kind of rotor is therefore called short-circuit rotor.

A rotating magnetic field induces an electromagnetic force into the rotor winding.

The electric circuit of the short-circuit rotor is always closed, thus creating a current flow

which generates another magnetic field (rotor magnetic field). The rotor magnetic field

attempts to catch up with the rotating field in the process. If the rotor rotates faster than

the rotating magnetic field, the engine automatically switches into braking mode. This

means that by changing the voltage and the frequency, the output (torque) and the speed

(number of revolutions per minute) can be altered. The frequencies and the voltages are



3

generated in the current converter. The main components are the four-quadrant converter,

the intermediate circuit and the pulse width modulation inverter.

In DC mode, the voltage is fed into the intermediate circuit via a line filter. The

transformer and the four-quadrant converter are therefore not required. After an

automatic commutation from AC to DC, the transformer cooling is automatically

switched off.

In braking mode, the vehicle can feed the generated energy back into the contact

line network. This is only possible if the network is able to receive the generated energy.

If the network is not able to do this, the pneumatic brake is activated.

1.3 CONTROL TECHNOLOGY

There are two Central Control Units called CCU. These are located in the driver's

cab. Apart from the control of the entire train, the CCU also controls the display. The

vehicles of one unit and the units themselves are connected to each other via an MVB

bus. The MVB is designed redundantly with line A and line B. If the MVB bus is not

available despite of this fallback, the vehicle can be operated in degraded operation via

the rescue drive mode. This function is only used for clearing the track. In this operating

mode, the display is switched off and the auxiliary tell-tale lamps are switched on. All

switches, buttons and devices which are controlled via the control technology are

connected to a KLIP station.

1.4 DISPLAY SUPPORT

The MMI (Man-Machine Interface) is installed in the driver's cab in the DTC and

informs the driver of the current state of all important functions in the train. The states of

functions are indicated to the driver by means of coloured icons. The driver can detect

faults at a glance. The display assists the driver during the subsequent error detection. For

information on further actions, the driver can call up the corresponding remedy for the

error message. Automatic vigilance device has been implemented via the master

controller. If the driver releases the vigilance monitoring button during the journey, the

brakes are applied automatically and the power of the train is switched off. This only

happens during the journey. If the speed is below 5 km/h, this function is disabled. In

rescue drive mode, the automatic application of the brakes is immediately initiated even

if the vigilance monitoring switch is not actuated and if the speed is below 5 km/h.

1.5 AUXILIARY EQUIPMENT

The three-phase auxiliary equipment are supplied by an auxiliary inverter. The

inverter for auxiliary equipment generates the following voltages:

415 Volt AC for fans / main air compressor and pumps

110 Volt AC for passenger compartment fans and lighting

110 Volt DC for the auxiliary air compressor, plugs, battery bus bar, instrument

and emergency lighting.

The inverter for auxiliary equipment supplies the three-phase components with a

fixed frequency (50Hz) and voltage. The auxiliary equipment is connected by means of

contactors.



4

1.6 UNIT & RAKE FORMATION OF EMU

There are two types of basic units

o End basic unit

o Middle basic unit.

1.6.1 End Basic Unit

It consists of three coaches viz.

Motor Coach (MC)

Driving Trailer coach (DTC)

Trailer Coach (TC)

Motor-Coach

This is the coach responsible for the movement of the EMU as desired by the driver

command. This consists of propulsion equipment viz. transformer, traction motor,

traction converters, (Four quadrant chopper), PWM inverters, brake chopper etc.

Driving Trailer Coach

This is non-powered coach with facilities for driving. These coaches are equipped

with Master/ Brake Controller, Drivers Desk, Passenger Information System, Light &

Fans etc.

Trailer Coach

This is also non-powered coach but without Drivers desk. Passenger Information

System and Light & Fans are provided in this coach.

1.6.2 Middle Basic Unit

It consists of three coaches viz.

Motor Coach (MC)

Non Driving Trailer coach (NDTC)

Trailer Coach (TC)

Non Driving Trailer Coach

This is non-powered coach without facilities for driving. These coaches are equipped

with Light & Fans etc.

Figure 1 : End Basic Unit

Figure 2 : Middle Basic Unit



5

1.6.3 Train Formation

For the EMU, following train formations are possible:

(i) Nine Car Rake : It comprises of 3 basic units

(ii) Twelve Car Rake : It comprises of 4 basic units

(iii) Fifteen Car Rake : It comprises of 5 basic units (Only in WR)

1.7 MAJOR EQUIPMENT OF DTC

1.7.1 Driving Cab

1 Side panel left + RDM signal lights 7 Speedometer

2 Signal lights 8 Radio /PIS panel

3 Display, MMI 9 Side panel right

4 Pressure panel 10 Pneumatic control valve (master brake

controller)

5 Key switch and master controller 11 Wiper valve

6 Power brake controller 12 Horn valve

Figure 3: Nine Car Rake

Figure 4: Twelve Car Rake

Figure 5: Fifteen Car Rake

Figure 6: Driving cab



6

1.7.1.1 Driving Desk

a. Brake controller

b. Master controller

c. Left hand side panel for push buttons, rotary switches and indications.

d. MMI

e. Different gauges

f. PIS

g. TMS (Train management system)

h. Foot operated valve for hooter

i. AWS indication panel

j. Analog speedometer

k. ESMON

l. SIBAS KLIP Station (12 & 13)

m. Cocks for AWS

1.7.1.2 Guard’s Desk

a. Brake pipe pressure gauge

b. Panel for push buttons

1.7.1.3 Electronic Cabinet

a. CCU

b. Push buttons

c. Rotary switches

d. MCBs (1st layer & 2

nd layer)

1.7.1.4 Driving Cab Front View

a. Head Light

b. Flasher Light

c. Tail light

d. Blinker

e. Marker light

f. Electronic head code

g. Look out glass

h. Cattle guard

i. Buffer & couplers

1.7.1.5 Panel in Passenger Area of DTC

a. SIBAS KLIP Station (11)

b. Different rotary switches MCBs, MPS for MCP, Ventilation fans, light & fans for

passengers.

Figure 7 : Driving Cab Front View



7

1.7.1.6 Roof Equipment:

a. Ventilation fans

1.7.1.7 Under-frame Equipment

a. Main compressor

b. Battery box

c. Different reservoirs

d. Combined brake unit

e. Parking brake equipment

f. Air suspension equipment

g. Mechanical weight transfer equipment

1.7.2 Indication Panels

1.7.2.1 Control Elements in the Driver's Desk on the Left-Hand Side

1. Mounting Plate 11. SB I (Signal Bell)

2. Flasher Push Button 12. Emergency Brake

3. Head Light Main / Auxiliary. 13. Emergency Off

4. Head Light On / Off 14. RDM Active

5. Audio visual push button 15. Fire Alarm

6. SB II Alarm bell (HW) 16. Spare

7. Head Light Bright / Dim 17. Minimum 1 Brake applied

8. Fire Alarm (Buzzer 18. Minimum 1 Panto up

9. Audio Visual (Buzzer) 19. Minimum 1 CB On

10. AWS vigilance 20. Lamp Test Driver

A. All switches/push buttons on this panel have metallic border

B. All indications on this panel have black border

Figure 8: Control Elements in the Driver's Desk on the Left-Hand Side



8

1.7.2.2 Auxiliary Tell-Tale Lamps

A 1 Not all Pantos up B 1 Emergency brake

A 2 Not all main switches on B 2 Emergency OFF

A 3 Spare B 3 Spare

A 4 Min. 1 brake applied B 4 Fire Alarm

A 5 Spare B 5 Spare

A 6 Spare B 6 Spare

A 7 Spare B 7 Spare

1.7.2.3 Pressure Panel

1. Brake Cylinder Gauge 2. MR/BP/Duplex Gauge

3. Panto Up / Down 4. Main Circuit Breaker On / Off

5. Cruise Control 6. Neutral Section Push Button

Figure 9: Auxiliary Tell-Tale Lamps

Figure 10: Pressure Panel



9

1.7.2.4 Man Machine Interface (General View)

1 Display ON / OFF

2 Not Connected

3 Legends of Symbols (Meaning)

4 Event Overview

5 Trouble Shooting Guidelines for Motorman

6 Not Connected

7 Brightness Control Dialog

8 Not Connected

9 Not Connected

10 Clear

11 Cursor Up

12 Cursor Down

13 Curser Left

14 Curser Right

15 Enter

16 to 25 Soft keys 0 to 9

Figure 11: Man Machine Interface (General View)



10

1.7.2.5 Train Radio and Passenger Information System

1.7.2.6 Control elements in the driver's desk on the right-hand side

1 Mounting plate

2 Cab tube light for driver

3 Cab spot light for driver

4 Cab emergency light for driver

5 Cab fan for driver

6 Parking brake release

7 Parking brake apply

8 PIS release button for microphone

9 PIS Microphone

1 PIS MMI

2 Train radio hands-free

module

3 Train Radio MMI

4 Pressure Gauge

Parking Brakes

5 Train radio Handset

Figure 12: Train Radio and Passenger Information System

Figure 12: Control elements in the driver's desk on the right-hand side



11

1.7.2.7 Guard Panel Right-Hand Side

1 Mounting Plate

2 Ventilation Release Off

3 Fan Release Off

4 Spare

5 Train Light 100 % Off

10 Flasher Light On / Off (Guard)

11 Tail Light On / Off

12 SB I Signal Bell (Guard) SW

13 SB II Alarm Bell (Guard) HW

18 Spare

19 Spare

20 Spare

21 Train Light 50 % Off

26 Cab Spot Light (Guard)

27 Cab Tube Light (Guard)

28 Cab Fan (Guard)

29 Lamp Test

Figure 13: Guard Panel Right-Hand Side



12

1.7.3 Electronics Cabinet DTC

1.7.3.1 Level 1

Figure 14: Electronics Cabinet DTC level 1



13

1.7.3.2 Level 2

Figure 15: Electronics Cabinet DTC level 2



14

1.8 MAJOR EQUIPMENT OF MOTOR COACH

1.8.1 Shunting Cab

1.8.1.1 Shunting Desk

a. Brake controller

b. Master controller

c. Shunting desk, rotary switches and indications.

d. Different gauges

e. Foot operated valve for hooter

f. SIBAS KLIP Station (21)

g. Shunting desk control panel

1 Mounting Plate 11 Lamp Test

2 Panto is Up 12 Parking Brake Released

3 MC is On 13 Panto Up / Down

4 OHE is available 14 Main Switch On / Off

5 Emergency Brake 15 HTC Tube

6 Min. 1 Brake Applied 16 HTC Fan

7 Summary Fault 17 Battery Volt Meter

8 Cab Tube Light 18 Test battery Voltage

9 Cab Emergency Light 19 Parking Brake Applied

10 Cab Fan 20 Start Extinguish Fire

1.8.1.2 Electronic Cabinet

a. DC earthing switch

b. Push buttons

c. Rotary switches

d. MCBs

Figure 16: Shunting Desk



15

1.8.2 HT Compartment

a. TCC

i. AC-DC converter (4Quadrant Chopper)

ii. DC-AC converter (Pulse width modulated inverter)

iii. Traction Control Unit

iv. Converter cooling blowers

v. Various contactors and relays

vi. Voltage & current sensors

b. Electronic Cabinet: Brake Electronics Control Unit (BECU)

Electronics cabinet MC (top)

Figure 17: Electronics cabinet MC (top)



16

Electronics cabinet MC (bottom)

c. Aux. converter unit

d. Aux. compressor

e. HSCB

f. VSD

Figure 18: Electronics cabinet MC (bottom)



17

1.8.3 Roof Equipment

a. Pantograph

b. Surge Arrestor

c. AC-DC change over switch

d. Brake resister

e. PT

f. HVCB

g. CT

h. Ventilation fans

1.8.4 Under Frame Equipment

a. Traction Motors

b. Traction Transformer



e. Air suspension equipment

f. Mechanical weight transfer equipment

1.8.5 Panel in Passenger Area of Motor Coach


b. Different rotary switches, MCBs, MPS for, Ventilation fans, light & fans for

passengers.

1.9 ELECTRICAL EQUIPMENT IN MOTOR COACH

1.9.1 Pre-Charging AC Contactor

This is AC contactor working under AC OHE supply. The traction transformer has

two secondary windings. This contactor is connected in one of the circuit. One resistor is

connected across the HT contact of the pre-charging AC contactor. Initially this contactor

remains open, keeping pre-charging resistor in power circuit of four quadrant chopper

module. As a result, initial inrush of charging current for DC link is reduced considerably

which ensures the safety of semiconductor devices of the four quadrant chopper module.

1.9.2 Pre-Charging DC Contactor

This is DC contactor working under DC OHE supply. Its function is to connect the

equipment to power supply under DC condition. One resistor is connected across the

HT contact of the pre-charging DC contactor. Initially this contactor remains open,

keeping pre-charging resistor in power circuit of DC link. As a result, initial inrush of

charging current for DC link is reduced considerably which ensures the safety of

semiconductor devices in the HT circuit.



18

1.9.3 Traction Converter Cubical

The traction converter cubicle is a completely assembled unit installed in the HT

compartment of the motor coach. The traction control unit (TCU) is situated inside the

cabinet. It consists following modules:

i. Four Quadrant Chopper Module (4 QC)

ii. Pulse Width Modulated Inverter

iii. Brake Chopper

1.9.4 Earth Fault Detector

It is connected across the circuit of 4-QC module for protection of 4-QC module

against the Earth Fault in AC side i.e. Transformer side of the HT circuit.

1.9.5 Line Filter

This is an inductor connected in series with DC link capacitor. This is LC

(resonance) circuit to suppress the harmonics or ripples of DC supply to obtain pure DC

supply across the DC link.

1.9.6 Auxiliary Converter Unit

Auxiliary converter unit basically consists of two PWM inverter modules with two

primary windings. Input supply for inverter modules is obtained from DC bus-link. There

are three different secondary windings for different purposes.

i. Three Phase AC 415V 50Hz Output

One secondary of auxiliary converter having 3 Ø AC, 415V, 50 Hz (121A/

87kVA) supply is used for Main compressor & other auxiliaries.

ii. Single Phase 110V AC 50 Hz Output

One secondary of auxiliary converter having 1Ø AC, 110V (20 kVA) supply is

used for light & fans in the passenger compartment. One tapping is taken out for

redundancy lines of supply for adjacent units.

iii. DC 110 V Output

One secondary of auxiliary converter having 3 Ø AC supply for battery charging

equipment is used. Battery having 110 V DC supply is connected across this

battery charging equipment to charge continuously. This 110 V DC supply is used

for control supply as well as for emergency light supply when normal light & fan

supply of 110 V AC is failed due to any reason.

1.9.7 Pantograph (Type Am-1882)

It is provided to collect H.T. Supply from OHE contact wire. The OHE supply may

be 1500 VDC or 25 KV AC, 50Hz. This is fitted on foot insulator on the top of the roof

of the motor coach.

1.9.8 Surge Arrestor

It is provided on the top of the roof of the motor coach to protect the coach from

lightening.



19

1.9.9 Line Voltage Transformer

It is provided on the roof of the motor coach. It is a step down transformer for

voltage sensing (AC or DC)

1.9.10 Line Current Transformer

It is provided on the roof of the motor coach. It senses the current through

primary winding of traction transformer. It provides over current protection by opening

VCB.

1.9.11 Voltage Sensing Device

The voltage sensing device is provided to sense whether the OHE supply is AC or DC.

1.9.12 Change Over Switch AC/DC

It is provided on the roof of the motor coach. It is an air operated switch with two

positions i.e. AC and DC. Default position of the switch is AC. It changes its position to

either AC or DC depending upon the OHE voltage.

1.9.13 Braking Resister Rs 25.10

1.9.14 High Voltage AC Circuit Breaker (HVCB)

This is an air operated single pole AC circuit breaker. It is used as a line circuit

breaker to open/ close the power circuit and also to break the circuit under overload and

short circuit conditions. It is provided on the roof of the motor coach.

1.9.15 High Speed Dc Circuit Breaker

This circuit breaker works under DC catenaries.

1.9.16 AC Earthing Switch

It is provided across the VCB. During off position of VCB it is connected to Earth

primary side of the traction transformer while opening H.T. compartment.

1.9.17 DC Earthing Switch

It is provided across the HSCB. During off position of HSCB it is connected to

Earth DC link while opening H.T. compartment.

1.9.18 Surge Arrestor AC

These are two in numbers. It is provided on the roof of the motor coach to arrest

AC surges during AC operation.

1.9.19 Surge Arrestor DC

It is provided on the roof of the motor coach to arrest DC surges during DC

operation.



20

1.9.20 Traction Motors

Four number of traction motors are provided in one motor coach. Two pairs of

traction motors are connected across two different PWM inverters.

1.9.21 Traction Transformer

The transformer is designed for a nominal rating of 1250 kVA. It consists of a

primary winding and 2 secondary windings. Therefore, 625 kVA is available at each

secondary. This corresponds to a secondary side nominal current of 731 A at a

secondary voltage of 855 Volt (22.5 kV mains voltage).

1.10 TRAILER COACH

1.10.1 Panel in Passenger Area of TC


b. Different rotary switches, MCBs, MPS for Ventilation fans, light & fans for

passengers.


Ventilation fans


a. Different reservoirs

b. Combined brake unit

c. Air suspension equipment

d. Mechanical weight transfer equipment

1.11 NON DRIVING TRAILER COACH

1.11.1 Panel in Passenger Area of NDTC


b. Different rotary switches, MCBs, MPS for MCP, Ventilation fans, light & fans for

passengers.


Ventilation fans


a. Main compressor

b. Battery box



e. Parking brake equipment

f. Air suspension equipment

g. Mechanical weight transfer equipment



21

1.12 TRANSDUCERS AND SENSORS

Transducers are the equipment which are utilised for converting the electrical or

mechanical quantities into suitable electrical signals so that these signals can be

processed by the control electronics for efficient control of the system. Following

transducers and sensors are used in Siemens AC-DC EMU:

a. Voltage transducer

b. current transducer

c. pressure transducer

d. speed sensor

e. oil flow sensor

f. oil level sensor

1.13 BRIEF DESCRIPTION OF HT POWER CIRCUIT

The pantograph receives the supply voltage of either 25 kV catenary or 1500 V

DC catenary. The detection of AC or DC voltage is achieved through voltage sensing

device which includes PT (potential transformer) for AC voltage detection & in series

resistors for DC voltage detection. In case of AC voltage detection or no voltage

detection, changeover switch AC/DC remains in the AC position thus connecting VCB

(Vacuum circuit breaker) to the pantograph. This is a failsafe method of protecting the

DC equipment against high voltage AC. For DC catenary, changeover switch AC/DC

moves to DC position connecting HSCB (High speed circuit breaker) to pantograph.

A spark gap lightening arrestor is mounted directly on the pantograph to protect

the complete circuit from extreme over voltages.

The VCB is the main circuit breaker in case of AC catenary & the HSCB acts as

the same for DC catenary.

Each motor coach is equipped with a main transformer. The main transformer

converts the 25 KV overhead line voltages to lower operating voltages. There are two

secondary windings each of 950V (corresponding to 25 kV), 625 kVA. The transformer

is oil cooled.

For AC catenary, as the VCB closes, the main transformer steps down the voltage

& feed the 4-QC (Four Quadrant Chopper Module) through two secondary winding of

950 V each (corresponding to a ratio of 25 kV/ 950 V). The initial charging of the 4-QC

is done through a pre-charging resistor (AC) which is in series with secondary winding-1

of the main transformer. Once the voltage at the 4-QC output is build up to certain

voltage level of DC using rectification process, the contactor across the pre-charging

resistor are closed & the 4-QC builds up a fixed voltage of 1800 V DC to feed the PWM

inverter & the auxiliary converter through DC link capacitor.

Main functions of 4-QC’s are to maintain a fixed DC voltage at its output

irrespective of the catenary voltage variations & to maintain a near unity power factor for

the current consumed from or fed back to the AC catenary. It achieves these functions

through two pairs of IGBT based modules. An LC filter circuit is provided at the output

of the 4-QC, to filter out the second harmonic components from the rectified voltage &

smoothen the DC link voltage.



22

Figure 19: Overview of AC/DC electric circuit



23

The AC circuit is protected against surge voltages through gapless surge arrestors (AC).

Similarly DC circuit is protected through gapless surge arrestors (DC).

For DC catenary, Changeover switch AC/DC is in DC position. As the HSCB closes the

DC link capacitor is charged through pre-charging resistor (DC) to avoid heavy inrush current.

After some time delay Line Contactor is closed to bypass the pre-charging resistor & the

full catenary voltage is applied across the DC link.

Fig. 20: Current converter (AC operation)

Fig. 21: Current converter (DC operation)



24

Figure 22: Power Circuit



25

The function of the PWM inverter is to convert the DC link voltage into a variable 3 ØAC

voltage of variable frequency in order to feed the traction motors. This is achieved through

IGBT based modules. The voltage & the frequency of the 3 Ø output is determined by the

control electronics named SIBAS-32 (Siemens Bahn Automatisierungs System with 32 bit

microprocessor) based on the demand. The traction motors are ASM (Asynchronous

Motor) or squirrel cage induction motors. Inductor is used for smoothing & makes along

with capacitor, a low impedance power source under DC catenary for the inverter &

auxiliary converter.

Protection resistors are externally connected to the brake chopper for protection.

When any serious fault is detected by SIBAS, it turns off all IGBT modules and fires

chopper. During this, entire DC link gets discharged through protection resistors. This is

only for over voltage protection of the DC link & no full duty braking resistor.

There are two Auxiliary Converter modules connected in series. These IGBT based

modules convert 1500V/ 1800V DC to 3 Ø, 415 V AC supply. This supply is connected to

two independent primary windings of isolation transformer. There are three secondary

windings out of which, two are 3Ø, 415 V & one is 1Ø, 110 V AC. One 3 Ø, 415 V AC

supply is extended to auxiliary machines which includes main compressor. Another supply

of similar voltage is given to battery charging equipment. One battery of 110 V DC supply

along with battery charging equipment are provided to extend control supply & emergency

light supply. 1Ø, 110V AC supply is extended for normal lights & fans in passenger

compartment. The same supply is also extended for redundancy lines to adjacent units.

Key data

Catenary voltage 25 kV AC 50 Hz and 1.5 kV DC

Maximum speed 100 km/h

Nominal rating (basic unit) 1100 kW

Wheel arrangement 2´ 2´ + Bo´Bo´ + 2´ 2´

Starting effort max. 135 kN (basic unit)

Vehicle weight 113.6 t (basic unit) 31.55t – 51.2t – 30.88t

Length (basic unit) 63 metres

Drive Integrated nose-suspended drive

Brake Compressed-air brake / electronic brake unit

Stop brake (basic unit) Spring-loaded brake 4 cylinder

Dynamic brake Catenary voltage-dependent network and

dynamic brake

Electric brake force max. (basic unit) 125 kN

Brake force max. (basic unit) 185 kN



26

1.14 PANTOGRAPH CONTROL

Compressed-air release

The compressed air for raising the pantograph is released via the key valve on the

rear panel of the shunting cab. If the key valve is closed, the pantograph cannot be raised

because the air supply to the lifting cylinders of the pantograph is blocked, irrespective of

whether the solenoid valve is activated.

If the pantograph is raised and the valve is closed, the air supply line to the lifting

cylinders of the pantograph is bled and the pantograph is lowered automatically.

Control for raising the pantographs

The pantograph can be raised and lowered via a rotary switch in the driver's cab.

The pre-requisite for this is a sufficient supply of compressed air in the compressed-air

reservoir. If no sufficient compressed air is available, it is generated by the auxiliary air

compressor. It is supplied by the battery.

The following conditions must be met to raise the pantograph:

* MCB switched ON

* Control voltage 110 V DC available

* Emergency stop switch not activated

* A shunting desk or driver's desk occupied / active

* Release via TCU

* Key valve open

* Release via push switch in the auxiliary air circuit

Change of driver's cab

In the case of a change of driver's cab, the pantograph may remain raised. The

change of driver's cab does not affect the pantograph control.

Lowering the pantograph

Normally, the pantograph is lowered by means of the "Panto down" rotary switch.

In the case of a fault, the pantograph can be lowered via the control unit in order to

protect the drive unit.

Figure 23: Pantograph valve



27

Figure 24: Lowering the pantograph

1.15 MAIN CIRCUIT-BREAKER CONTROL

The AC main circuit-breaker, which is operated with compressed air, is located

on the roof of the MC, the DC main circuit-breaker in the HTC. Next to the AC main

circuit-breaker, there is also the earthing switch. Every unit has a separate AC and DC

main circuit-breaker.

Control for switching ON the main circuit-breaker

The power system on the OHE is detected by the power detection system. Before

the main circuit-breaker can be switched ON via the TCU, a test run takes place in the

TCU. This check determines whether all requirements for switching ON the main circuit-

breaker are met. If all of the requirements for switching ON a main circuit-breaker are

fulfilled, this is indicated by a white field and an MC symbol on the display.

As a next step, the driver can switch on the correct main circuit-breaker for the

detected power system via the "MCB ON" command.

In the process, the system selection switch is switched to the AC or DC position

by the detected power system. Depending on the position of the system selector switch,

the corresponding main circuit-breaker is released for connection and switched ON.

In the case of malfunctions as a result of system detection or the system selection

switch, the main current components are protected against dangerous overvoltage by

means of lightning arresters.

MCB “Panto/MC) switched on

Control voltage 110 V DC available

Emergency stop switch not activated

A driver's desk occupied / active

Release via control technology

Key valve open

Release via push switch

40 l

approx. 4.2 kg/cm² Rotary

switch "Panto"

up/down

Pushbutton "Panto up" is actuated

Lifting time exceeding Emergency stop is operated

MCB “Panto/MC)” off

Pantograph key valve is closed

Panto down via control technology

Drop of pressure, pressure below 3.4 kg/cm²

Power system not recognised

TCU

MCB



28

Change of driver's cab

In the case of a change of driver's cab, the main circuit-breaker may remain

switched ON. The change of driver's cab does not affect the main circuit-breaker control.

Opening the main circuit-breaker

In the event of an emergency, the main circuit-breaker is opened via the rotary

switch "MC OFF". In the case of a fault, the main circuit-breaker can be opened via the

control unit in order to protect the drive unit.

Figure 25: Requirements for switching on the main circuit-breaker

1.16 EARTHING SWITCH

It has to be ensured that the earthing switch is only actuated after the main circuit-

breaker has been switched OFF and the pantograph has been lowered. The earthing

switch short-circuits the main circuit-breaker directly with the chassis of the vehicle.

Requirements for switching on the main circuit-breaker

MCB “Panto/MC” switched on

Control voltage 110 V DC available

A driver's desk occupied / active

Emergency stop switch not activated

Release via control technology (ACU / TCU)

Correct position of the COS (AC / DC)

The main circuit-breaker of the other power system is switched off

Rotary

switch

MC on/off TCU

Requirements for switching off the main circuit-breaker

Pushbutton "MC off" is actuated

Emergency stop is operated

MCB “Panto/MC” off

Pushbutton "Panto down" is actuated

Main circuit-breaker off via control technology (TCU / ACU)

Drop of pressure, pressure below 3.4 kg/cm²

Catenary voltage < 16 kV & > 30 kV (AC) / < 0.75 kV & 2.0 kV (DC) Overhead current > 200A (AC) / 1200 A (DC)

MCB



29

1.17 EARTHING

Key concept for connecting the basic units to earth:

Prior to opening the HTC, the basic units have to be connected to earth. For

personal protection, always follow the procedure described below:

Opening the door to the HTC with the green key

Secure vehicles against un-intentional movement

Switch OFF the main circuit-breaker

Lower pantograph

Remove the key for the pantograph (blue)

Visual check ensuring that the pantograph of

the unit to be connected to earth has been lowered

Use the blue key to connect the AC main circuit-breaker to earth and remove the yellow key

Use the yellow key to connect the current converter and the DC main circuit-breaker and remove the green key

Use the green key to open the door to the HTC

Please take good care of the keys as these are the only one which fit here. To

disconnect the basic units from earth, proceed in reverse order.

Figure 27: Earthing switch, AC

main circuit-breaker

Figure 28: Earthing switch, DC

main circuit-breaker

Figure 26: Lock to HTC

CHAPTER 2

AUXILIARY CONVERTER

UNIT

(ACU)

CONTENTS


2.0 INTRODUCTION 01

2.1 INSTALLATION POSITION 01

2.2 SUPPLY SYSTEM 01

2.3 COMPONENT LAYOUT IN THE CABINET 02

2.4 COOLING 04

2.4.1 External air flow 04

2.4.2 Internal air flow 05

2.5 OPERATION 05

2.6 OPERATING THE AUXILIARY CONVERTER UNIT 06

2.6.1 Switching-ON in Normal Operating 06

2.6.2 Switching-off in Normal Operating 06

2.7 ELECTRICAL DATA 07

2.7.1 Input DC 1500V 07

2.7.2 Three Phase AC 415V 50Hz Output 07

2.7.3 Single Phase 110V AC 50 Hz Output 07

2.7.4 DC 110 V Output 08

2.8 SAFETY REGULATIONS FOR WORK ON THE ACU 08



1

CHAPTER 2

AUXILIARY CONVERTER UNIT (ACU)

2.0 INTRODUCTION

The Auxiliary Converter Unit (ACU) contains all components needed to supply

the power system load including battery charger. The ACU is installed in the middle car

(motor coach) of a basic train unit and is designed for an input voltage of DC 1500V. It

receives this from the traction link.

2.1 INSTALLATION POSITION

Every three-part basic train unit contains an Auxiliary Converter Unit. This is

installed in the HT compartment in the middle car (Motor Coach).

TC Trailer Car HT High Tension Compartment

TPC Transformer Power Car NDMC Non Driving Motor Car

2.2 SUPPLY SYSTEM

The input of the Auxiliary Converter Unit is connected to the traction link.

During AC operation of the driving train, the ACU is fed from the four quadrant

regulators of the drive power converter.

During DC operation, the ACU is supplied via the input filter of the traction

system from the contact line.

The rotary current output (3 phase AC 415V) of the Auxiliary Converter Unit

feeds the rotary current drives, e.g. for the primary air compressor or the components

fan/blower.

The AC output (AC 110V) supplies the passenger compartment fan and the

primary lighting.

The DC output (DC 110V) serves to charge the battery and feed the DC

equipment, such as electronic control devices, protective equipment and emergency

lighting.

Figure 1 - Block diagram of one train basic unit



2

In normal operation, an Auxiliary Converter Unit supplies one three-part basic

train unit. If an ACU fails, the AC 110V and DC 110V equipment of the affected unit are

supplied by a neighboring unit.

2.3 COMPONENT LAYOUT IN THE CABINET

The following diagrams show the position of the major components in the Auxiliary

Converter Unit.

T1 Pulse-width-modulated inverter

T2 Pulse-width-modulated Inverter

T3 Battery charger

A1 Mounting plate A1 A2 Mounting plate A2

A3 Mounting plate A3 A4 Mounting plate A4

A5 Diode module A5 A6 Capacitor assembly A6

Figure 2 - Block diagram of one train basic unit

Figure - Position of the power modules in the cabinet

Figure 3 - Position of mounting plates and components in the

cabinet



3

A8 Pivoting frame A8 R9 Sine filter resistor

R13 OVP resistor R14 OVP resistor

V6 Capacitor assembly Q7 Decoupling diode

M1 Fan M2 Internal fan

M3 Internal fan

R4 Line choke

R15 BC line choke R20 Air intake temperature sensor

T4 Main transformer

FUNCTIONS OF MAJOR COMPONENTS IN AUXILIARY CONVERTER UNIT

Sr.

No.

Component Designation Brief description and application in the

Converter

1 PWMI

Module

T1,T2 These Pulse width modulated Inverter modules are

used for the basic inverter operation in the

Auxiliary converter. They are fed with DC supply

and the PWM outputs of these modules are then fed

to the transformer which connects them in series for

high DC link voltage operation.

2 Battery

Charger

Module

T3 The Battery charger is used to charge the battery in

the train. It is fed with DC voltage which is derived

form the main Transformer (3 Phase AC) through

the Battery charger rectifier and filter.

3 Master

Controller

K1 The M1300 SIBCOS Main controller is used to

control the overall operation of the Auxiliary

Converter and to take the feedback signals for fault

detection and preventive actions.

4 CAN Bus

Controller

K2 The M9000 CAN bus Communication card is used

for the communication between Auxiliary converter

and external devices.

5 Line Filter

Choke

R4 The DC Line choke is used to filter out the ripple in

the DC link voltage fed to the PWMI modules.

Figure 4 - Back side of the cabinet



4

Sr.

No.

Component Designation Brief description and application in the

Converter

6 Main

Transformer

T4 The PWM inverter Outputs are connected to

the main transformer, which has two 3 phase

primary winding and three secondary

windings for 3 phase 415 volts output, 1

phase 110 Volts output and 3 phase 500

Volts output.

7 BC Line Filter

Choke

R15 The Battery Charger filter choke is used to

filter out the DC voltage fed to the Battery

charger module after rectification from 3

phase supply from the transformer

secondary.

8 Main Blower M1 The Main blower is used for cooling of the

modules and transformer and line choke. It

takes Air from the duct and forces it on the

module heatsinks, this air is then forced on

the main transformer and line choke and

goes out from bottom of the converter.

9 Aux. Blower M2, M3 The auxiliary Blowers are used for internal

cooling of

2.4 COOLING

The Auxiliary Converter Unit is forced-air cooled.

The cabinet contains one main fan and two internal fans.

2.4.1 External air flow

The Auxiliary Converter Unit receives its

cooling air from the auxiliary operator console. The

cooling air is drawn in via an intake air grate on the

top of the cabinet.

Within the cabinet, the cooling air runs

through the main fan to the heat sinks of the power

modules and to the main transformer.

The air leaves the cabinet via a ventilation

grate on the bottom of the cabinet. The air leaves

downward into the bogie.

The main fan is switched ON as soon as the Auxiliary Converter Unit produces output

voltage.

Figure 5- External air flow

1 Air inlet

2 Main fan

3 Power modules heat sinks (4x parallel)

4 Main transformer

5 Air outlet



5

2.4.2 Internal air flow

The internal air circulation is produced by two

internal fans M2 and M3. They run continuously, i. e. they

are switched ON together with DC 110V supply of the

unit.

1 Internal fan M2

2 Internal fan M3

2.5 CIRCUIT DESCRIPTION

The Auxiliary Converter Unit is fed via the traction converter link. The nominal link

voltage is DC 1500V.

The prerequisites for operation of the Auxiliary Converter Unit are:

The ACU receives the activation signal from the vehicle control.

The input voltage lies within the valid range.

No errors occur in the ACU.

Figure 6- Internal air flow

Figure 7- Auxiliary converter ckt.



6

If the activation conditions are met, the DC input voltage is fed to the PWMI

modules via the input fuses A2-F1 / A2-F2, the line choke R4 and the input diode A5-Q1.

The two PWMI modules connected in series are switched ON and started up. If the

voltage at the PWMI output is in the specified range, the output fuses A1-Q2 / A1-Q3 are

closed. The ACU control sends a message to the vehicle control that the 3phase AC

output is ready for operation. Then the battery charger is switched ON and a message is

sent to the vehicle control.

The AC 110V and 3 phase AC 415V output is fed via the main transformer T4,

sinus filter, EMV filter and output fuses behind the PWMI modules.

The battery charger operated via the main transformer and the battery charger

input rectifier A5-Q10 generates a DC 110V voltage at the output and supplies the DC

110V rail of the train unit and charges the train battery with this.

Battery charging characteristic

The batteries used in the train are Lead acid batteries with a nominal voltage of

DC 110V. The load program corresponds to a IU-characteristic.

• Maximum device current: 82A

• Maximum battery charging current: I5=30A

• Charging voltage: U1= 115V

The battery is charged with the maximum battery charging current of I5=18A

until U1=110V is achieved. Then the charge continues with a constant charging voltage

U1 (with decreasing charging current).

2.6 OPERATING THE AUXILIARY CONVERTER UNIT

2.6.1 Switching-ON in Normal Operating

Special operation of the Auxiliary Converter Unit is not necessary. The ACU

automatically switches ON when

High voltage is present at the traction link,

The activation signal from the train signal is sent and

No error exists on the ACU.

2.6.2 Switching-off in Normal Operating

The Auxiliary Converter Unit automatically switches OFF itself when the

activation signal is withdrawn by the vehicle control.



7

2.7 ELECTRICAL DATA

2.7.1 Input DC 1500V

Requirements Values Comments

Nominal input voltage 1500 V DC mode

1800 V AC mode

Voltage range, stationary 1000 - 1800 V DC mode

1700 - 1800 V AC mode

Short time minimum 800 V DC mode

Occasional maximum 2000 V DC mode

2100 V AC mode

Ripple 4% DC mode

+/- 135 V AC mode

2.7.2 Three Phase AC 415V 50Hz Output

One secondary of auxiliary converter having 3 Ø AC, 415V, 50 Hz (121A/ 87 kVA)

supply is used for Main compressor & other auxiliaries.

Output frequency 50 Hz ± 1 %

Output voltage 415 V AC, 3-phase

Static tolerance of output voltage ± 5 %

Dynamic tolerance of output voltage ± 15 %

Max. voltage rise of output voltage < 10 V/s

Total harmonic distortion < 10 %

Output filter EMC filter/ sinusoidal filter, isolation

transformer

Output nominal power: 87 kVA at Cos = 0.85

Unsymmetrical load: ≤ 10 % of nominal power

2.7.3 Single Phase 110V AC 50 Hz Output

One secondary of auxiliary converter having 1Ø AC, 110V (20 kVA) supply is

used for light & fans in the passenger compartment. One tapping is taken out for

redundancy lines of supply for adjacent units.

Output frequency 50 Hz ± 1 %

Output voltage: 110 VAC, 1-phase

Static tolerance of output voltage: ± 10 %

Dynamic tolerance of output voltage: ± 15 %

Max. voltage rise of the output voltage: < 10 V/s

Total harmonic distortion: < 10 %

Output filter: EMC filter / sinusoidal filter, isolation

transformer

Output nominal power: 20 kVA at cos = 0.89



8

2.7.4 DC 110 V Output

One secondary of auxiliary converter having 3 Ø AC supply for battery charging

equipment is used. Battery having 110 V DC supply is connected across this battery

charging equipment to charge continuously. This 110 V DC supply is used for control

supply as well as for emergency light supply when normal light & fan supply of 110 V

AC is failed due to any reason.

Output Voltage 110 V DC ( Pay attention to battery charging

characteristic)

Static tolerance of output voltage: +20%, -30 %

Output nominal power 9 kW At nominal output voltage

Max. output current (continuous) 82 A

Control precision of battery

voltage:

± 1.5 % At voltage detection point.

(Detection point = battery charger

output)

Control precision of the current

limiter:

± 5 %

Ripple on output voltage: ≤1 % RMS At Nominal output voltage

Output filter: EMC filter

2.8 SAFETY REGULATIONS FOR WORK ON THE ACU

Whenever working on the cabinet the following five operations must be completed.

i. De-energize the ACU

De-energize the Auxiliary Converter Unit according to the instructions of

the person responsible for the train.

Then switch OFF the battery power. You can only disconnect the

connection between the battery charger and car battery by pulling the

battery plug or by removing the car battery fuse.

Switch off the master control SIBCOS-M1300 by interrupting the DC 110V

supply. To do this, pull the plug "X040" from the control.

ii. Ensure ACU cannot be switched ON again

Ensure power cannot be switched ON again and pantographs cannot be

raised.

Mark points that have been switched to voltage free with a warning sign.



9

iii. Check that the installation is dead on both parts of ACU

Measure the absence of voltage at the following points. The measured voltage

should not be more than 60V.

DC 1500V

Component Measuring points

Spherical grounding electrode -E1

-E2

-E3

DC 650V (Input to battery charger)


Battery charger T3 T3: -X4 (+650V)

T3: -X5 (0V)

DC 110V (Output to battery charger)


Battery charger T3 T3: -X3:1 (0V)

T3: -X3:2 / -X3:3 (+110V)

iv. Ground and short-circuit the ACU

Short-circuit the spherical grounding electrodes E1, E2 and E3 (refer to Figure 1)

using a suitable ground short-circuiting kit in order to ground and short-circuit the DC

link of the ACU.

NOTE

Use a three-terminal grounding and short circuit device (with short-circuit ropes

and earthing cable) for ball fixed-points Ø20mm.

Note the correct order. First connect E3 to the grounding / short circuit device, then

E1 and E2.

v. Cover or isolate parts

After opening the hatches, cover or isolate parts nearby that are live.

Figure 8 – Position of the spherical grounding electrodes in the cabinet

CHAPTER 3

TRACTION CONVERTER

CUBICLE

CONTENTS S.No. Description Page No.

3.1 TRACTION CONVERTER CUBICLE 01

3.2 ELECTRICAL SYSTEM 01

3.3 LIST OF COMPONENTS 06

3.4 PHOTOGRAPHS OF MAJOR COMPONENTS 08



1

CHAPTER 3

TRACTION CONVERTER CUBICLE

3.1 TRACTION CONVERTER CUBICLE

The traction converter cubicle is a completely assembled unit installed in the HT

compartment of the motor coach. The traction control unit (TCU) is situated inside the

cabinet. The technical details are as following:

Nominal input voltage 2 x 950 V AC, 50 Hz / 1500V DC

Input voltage range in AC mode 627 V – 1083 V AC

Which is related to a line voltage from

16.5 – 28.5 kV

Input frequency range in AC mode 46Hz – 54 Hz

Input voltage range in DC mode 800 V – 1800 V DC

Nominal DC link circuit voltage

traction operation

AC Mode 1800 V

DC Mode 1500 V

Power factor in AC at different loads

and line voltages

Approx. unity

3.2 ELECTRICAL SYSTEM

The traction converter works on dual voltage system i.e. line input of 1500V DC

or 950V, 1ph, 50Hz AC (25KV AC line). The converter consists of two four-quadrant

chopper, one DC link, two PWM Inverters each delivering two traction motors. The

converter also includes DC link capacitors, contactors, transducers, blowers etc. The

function of the traction converter is controlled and monitored by Siemens’ Traction

control unit (TCU) SIBAS® 32S.

Figure 1- TCC



2

Figure 2 - Schematic of the traction converter



3

3.2.1 Functional sections of the traction converter in AC Mode

The traction converter consists of the following functional sections in the AC

Mode operation:

• Input and pre-charging

• Four-quadrant chopper

• DC link circuit

• Capacitive earth-fault registration

• Pulse width modulated inverter & Braking chopper

Input and pre-charging

Refer to Figure for the schematic of the functional input section in AC Mode.

Two poles (K1.1 and K1.2) of a double pole contactor (K1) isolate the transformer and

4QC module from each traction winding of the transformer. A pre-charging unit is

connected in parallel to this main contactor. The pre-charging unit consists of a single

pole pre-charging contactor (K4), One pole K4.1 connected in series with a pre-charging

resistor (R31). The pre-charging resistor comprises of two resistors R31.1 and R31.2 in

parallel.

When the converter is put into operation, first the DC link capacitor of the

inverter is pre-charged before the main contactor is closed using diodes in 4QC modules.

This prevents the high inrush current, which would result if the input voltage was

suddenly switched onto the empty converter. The main contactor is switched on after the

DC link voltage has reached 90 % of the theoretical final charge.

Four Quadrant Chopper Module (4 QC)

A four-quadrant chopper consists of a bridge as shown below in Figure. The

purpose of the 4QC is to transform the input voltage (generally single phase AC from the

transformer) into a controlled direct voltage for the DC link circuit. The term 4QC

signifies that the phase angle between voltage and current is freely adjustable while

driving as well as while braking. Through the combination of phase situation and mode

of operation all four operational quadrants can be obtained.

Figure 3 - Input section in AC mode of operation



4

The IGBT’s are used as switches with a high closing sequence. The function is

described exemplarily for rectifier-operation starting from a current less situation. To

build up a current in the self-inductance of the transformer LN one of the two IGBT’s A2

or A3 (positive half-wave, A1 or A4 at the negative half-wave) is triggered. During this

the secondary side of the transformer is short circuited. As soon as the current has

reached the desired value the IGBT is blocked. The current continues to flow via the

freewheeling diode into the DC link circuit and is reduced by this (UD UN).

Afterwards the process starts again and during it the IGBT’s are used alternately to put

equal thermal burdens on them.

Number of 4 QC per Traction Converter

Cubical (TCC)

2

Semiconductor IGBT

Type of phase module SIBAC BB S P 1500 FL

Pulse frequency 750 Hz

Pulse Width Modulated Inverter

The IGBT’s can be essentially defined as basic switches with a high clock

frequency. This means it is possible to connect 3 output terminals U, V, W as required to

the + or of the voltage DC link Cd. The switching sequences are selected so that a

sinusoidal current is obtained. The voltages between two output terminals are now

observed. The maximum possible amplitude of the phase to phase output voltage is a

function of the magnitude of the DC link voltage Ud.

The RMS value of the output voltage can be reduced by clocking. This clocking

comprises brief turn-off operations within a basic fundamental. The frequency, with

which the output waveform is repeated, is the same as the PWM inverter output

frequency.

When braking, the motor torque direction opposes the direction of rotation. There

is considerable phase shift between the voltage and current. By entering the basic

fundamental, the PWM inverter adjusts the phase between the voltage and current.

Figure 4 - Four Quadrant Chopper Module



5

Number of PWMI per TCC 2

Number of traction motors per PWMI 2

Semiconductor IGBT


Pulse frequency Variable, up to 800Hz

Brake Chopper

Protection resistors are externally connected to the brake chopper for protection.

When any serious fault is detected by SIBAS, it turns off all IGBT modules and fires

chopper. During this, entire DC link gets discharged through protection resistors. This is

only for over voltage protection of the DC link & no full duty braking resistor.

Number per TCC

(per PWM inverter a double module (PWM inverter, brake chopper)

2

Semiconductor IGBT


Pulse frequency 250 Hz

Capacity of DC link circuit 12 mF -0 % 10 %

Inductance of line reactor 6 mH -0 % to10 %

Control Voltage

Control voltage range

Max operating current at nominal voltage

110 V DC

77 V to 137.5 V DC, 10 Amp.

Auxiliary supply voltage

Continuous power demand

3AC, 415V, 50Hz

approx. 6.2 kW

Figure 5- Pulse Width Modulated Inverter



6

Power rating

Parameter Continuous rating Short time rating

(2 min)

Input Power per 4QC 620 kW 720 kW

Input Current per 4QC 764 A 903 kW

Output Power per PWMI ( AC & DC) 535 kW 630 kW

Output Current per

PWMI

AC 322 A 371 A

DC 400 A 446 A

Out put voltage (L-L) AC 1217 V 1217 V

DC 986 V 1024 V

Capacity of DC link circuit : 12 mF -0 % +10% ( 4 X 3 mF)

Inductance of line reactor : 6 mH 0 % to +10 %

Air Flow : 1.9 m3/s ( 0.95 m

3/s per blower)

Air Flow required : 1.6 m3/s

Forced Ventilation

Traction Converter Cabinet is a forced air-cooled system. The airflow direction is

shown in figure given below.

Figure 6: Principle of forced ventilation



7

3.3 LIST OF COMPONENTS

Type Number Description Functional

Unit

Designation

in cabinet

Quantity

per TCC

Part no

SP1500FL IGBT Module

–Single Parallel

4 Quadrant

Choppers

A1, A2,

A11,A12

4 A5E00281205

SD1500FL IGBT Module

–Double

PWM

Inverters

A3, A5,

A13,A15

4 A5E00281211

4PK9904-7AB Line Filter

Choke

DC Line L1 1 A5E00465421

LTHS-1250-2P Line Contactor

DC

DC Main-

/Line-Contactor

K6 1 A5E00422750

LTHS-800-2P Line Contactor

AC

AC Main-

/Line-

Contactor

K1 1 A5E00307978

LTC-250-2P Pre-charging

Contactor DC

DC –

Precharging Circuit

K5 1 1012253

LTC-250-1P Pre-charging

Contactor AC

AC Pre-

charging

Circuit

K4 1 A5E00406971

2CS7-410-

1RG11-0KK3

Main Blower Main

blowers for cooling

M1, M2 2 A5E00296015

148DH9LM

18230

Auxiliary

Blower

Auxiliary

blowers for

churning air

M11,

M12,M13

3 1000263

DCMKP 2.2/

3mF or

E56.M45- 305680

DC Link

Capacitor

DC Link C1, C2,

C3,C4

4 A5E00374704

P354.1-IGBT DC/DC

Power

Supply

IGBT

Driver card

power supply

A91, A92 2 A5E00296016

CS1000BRVE

or LTC600-

SFC-SPxx

Current

Transducers

AC/ DC

Input output

currents

U1, U2, U3,

U4, U5,

U6,U7, U8

8 A5E00307975

A5E00303286 Voltage

Transducers

DC Voltage

monitoring

U31, U32,

U33, U34

4 A5E00303286

TV 1164 (CT) Intermediate

Transformer

Current

System

current

monitoring

T4, T5 2 5E00422663



8

Type

Number

Description Functional

Unit

Designation

in cabinet

Quantity

per TCC

Part no

TV 1162

(VT)

Intermediate

Transformer

Voltage

System

Voltage

monitoring

T3 1 A5E00422668

BNV

05.110.d/

0.5 X2

SIBAS Filter SIBAS

Power Supply Filter

Z1 1 621961

31138210 Temperature

Sensor – Air

Inlet

Air Inlet

Temperature

B1 1 279729

PVR900T or

GBS 60/370 60R +/-5%

Pre-charging

Resistor

AC/ DC Pre

charging Circuit

R31.1,R31.2,

R32.1,R32.2

4 A5E00422669

PVR160 or

GWS 300 SB

33K +/-5%

Discharge

Resistor DC

Link

Discharge

and Earth

Fault Detection

R42 1 A5E00422670

PVR160 or

GWS 300 SB

99K +/-5%

Discharge

Resistor DC

Link

Discharge

and Earth

Fault Detection

R41 1 A5E00422672

B25835-

S2224-K057

Grounding

Capacitor

DC Link

Discharge

and Earth

Fault

Detection

C75 1 A5E00122720

3RT10172K

F420LA0

Contactors

for Blower

Blower

Circuit

K92, K95 2 1012617

3RH11222K

F400LA0

Auxiliary

Contactors

Auxiliary

Circuit

K51-K53 3 1010736

6FH4742-1A SIBAS 32 S Traction

Control

Unit

A100 1 A5E00299514

343434 EMC

capacitor

DC link

circuit

C71 1 343434



9

3.4 PHOTOGRAPHS OF MAJOR COMPONENTS

TCU with control connectors IGBT module

4 Quadrant chopper IGBT

module

PWM Inverter IGBT module



10

Position of K1 and K6 contactor

Assembly of C1 and C2 seen from

contactor side of cabinet

Assembly of C3 and C4

seen from SIBAS side of

cabinet

Figure showing location of main blowers



11

Main blower motor cable connectors

Pre-charging resistor plate

assembly

Current transducers with bus bar

Auxiliary transducer Auxiliary contactors

Auxiliary blowers

CHAPTER 4

TRACTION MOTOR


4.1 TRACTION MOTOR 01

4.2 TECHNICAL DETAILS 01

4.2.1 Gear ratio 02

4.2.2 Ratings 02

4.2.3 Maximum Starting Current (0 to 950 rpm up to 14 seconds) 02

4.2.4 Motor Bearings: 02

4.2.5 Motor Suspension Unit (Nose-Suspension) Bearings 02

4.2.6 Gear& Pinion 03

4.2.7 Maintenance Check List 03

4.2.8 Oil Level 03

4.2.9 Earth Return Brush 04



1

CHAPTER 4

TRACTION MOTOR

4.1 TRACTION MOTOR

Four number of traction motors are provided in one motor coach. Two pairs of

traction motors are connected across two different PWM inverters. 4.2 TECHNICAL DETAILS

Type Designation : 1TB2022-0TA03

Make : M/s Siemens

Electrical data

Number of Poles : 6

Specific Electric Loading : 476 A/cm

Flux Density in Air Gap : 0.8 T

Flux Density in Stator Yoke : 1.0 T

Flux Density in Rotor Yoke : 0.75 T

Thermal Class : 200

Connection : Star

Supply cable : 1 x 35 mm2 per phase

Mechanical Data

Air gap: : 1.5 mm

Air ventilation: : 0.25 m2/s

Stator bore dia: : 325 mm

Rotor diameter: : 322 mm

Length of the core : 350 mm

Maximum rating

Max. Motor speed (fully worn wheel) : 3452 rpm

Max. torque (new wheel) : 2903 Nm

Max. Power (at tractive effort curve) : 84 kW



2

4.2.1 Gear ratio

5.71 (97 teeth gear wheel / 17 teeth pinion)

Torque Fundamental

motor current

Cos Φ

(Power Factor)

Efficiency

DC-Mode 1147 Nm 167 A 0.81 95 %

AC-Mode 1147 Nm 150 A 0.79 95 %

4.2.2 Ratings

Parameter Continuous Operation One Hour Rating Two Minute Rating

Voltage 932 V 993 V 1043 V

Current 200A 211A 223A

Power 240 kW 270 kW 300 kW

Power Factor 0.79 0.79 0.79

Frequency 101.5 Hz 101.5 Hz 101.5 Hz

Speed 2000 rpm 2000 rpm 2000 rpm

Torque 1147 Nm 1290 Nm 1434 Nm

Efficiency 94% 93.5% 93.5%

4.2.3 Maximum Starting Current (0 to 950 rpm up to 14 seconds):

New wheel : 276A

Half worn wheel : 267 A

4.2.4 Motor Bearings:

DE : Cylindrical-Roller Bearing F-809035.01.NU-J20AA

Oil Lubricated/ Electrically Insulated)

Make : FAG

Lubrication oil : Gear Oil

Min qty required : 10 mm3/h

NDE : Deep Groove Ball Bearing

DIN 43283-6316.808916.J20AA

(Grease Lubricated/ Electrically Insulated)

Make : FAG

Bearing Grease : Shell RetinaxLX2

4.2.5 Motor Suspension Unit (Nose-Suspension) Bearings:

DE : Tapered Roller Bearing 566566.J20AA


Make : FAG


NDE : Tapered Roller Bearing 809055.J20AA (with flange)


Make : FAG




3

4.2.6 Gear& Pinion:

Make : M/s Flender

Type : Single slant toothed spur gear

2LB6095-3AA57

Material of pinion and gearwheel : 17rNiMo6

Material of gear case : casting material GGG40

Gear Ratio : 97/17

Gear Oil : Shell Spirax AX 80W-90 or A 85W-145

4.2.7 Maintenance Check List:

Stator Resistance : 85.35 mΩ + 5% at 20° C

With 10 A DC

Insulation Resistance : 2 MΩ with 500 V DC (Used)

10 MΩ with 500 V DC (commissioning)

High Voltage Test : 2100 V(AC 50/60 Hz) /1 min (Used)

3680 V(AC 50/60 Hz) /5sec (commissioning)

4.2.8 Oil Level

Initial Quantity Refilling Quantity

Motor NDE Bearing 0.15 kg/Bearing 26 g/Bearing

Nose Suspension Bearing 1.2 Kg/Bearing 300 g/Bearing

Gear Oil 2.8 litre (approx) 2.5 litre (approx)



4

4.2.9 Earth Return Brush

Make : M/s Shunk metal and Carbon (India ) Pvt. Ltd.

Type : B 1726 10

No of working brushes : 2

No of safety brushes : 2

Brush Measurement : 20x40x55mm

Brush grade : BSQR

Nominal Brush pressure : 300 cN/cm2 (4.35 PSI)

Continuous load :

Effective working current: : 520 A (with 2 brushes)

Max. short term overload:

1 hour load(1.5 x) : 780 A

100 ms Load (15 x) : 5200A

Average brush wear : 3.5 mm/1,00,000 km

Wear Height : 33mm

CHAPTER 5

TRACTION

TRANSFORMER


5.1 TRACTION TRANSFORMER 01

5.2 TECHNICAL DATA 01

5.3 MAJOR COMPONENTS OF TRANFORMER 03

5.3.1 Transformer oil pump 04

5.3.2 Air Dryer (Breather) 04

5.3.3 Heat Exchanger (Radiator) 05

5.3.4 High Voltage Bushing ( HT terminal) 05

5.3.5 Earth Terminal 05

5.3.6 Butterfly Valves (Drain & Filling cock) 05

5.3.7 Ball valve 06

5.3.8 Marshaling Box (Low voltage terminal) 06

5.3.9 Name Plate 06

5.3.10 Suspension Arrangement 06

5.3.11 Bellow (Flexible Coupling) 07

5.3.12 Thermometer Sensor 07

5.3.13. Pressure Relief Valve 07

5.3.14 Oil Level Indicator 07

5.4 NEW OIL CHARACTERISTICS: 08

5.5 TRANSFORMER OIL COOLING CIRCUIT 09



1

CHAPTER 5

TRACTION TRANSFORMER

5.1 TRACTION TRANSFORMER

The transformer is designed for a nominal rating of 1250 kVA. It consists of a

primary winding and 2 secondary windings. Therefore, 625 kVA is available at each

secondary. This corresponds to a secondary side nominal current of 731 A at a secondary

voltage of 855 Volt (22.5 kV mains voltage). The transformer is cooled with a total of

530 litres of oil.

5.2 TECHNICAL DATA

Manufacturer : ABB Secheron SA

Type : LOT1250, Oil Immersed transformer

Identification No : XCH000000-AUC

Nominal Line Voltage : 25 kV (19 to 27.5 kV)

Line voltage min (2s < t < 10min) : 16.5 kV

Line Voltage max (2s < t < 5 min) : 30 kV

Frequency : 50 Hz (46 to 54 Hz)

Installation point : Under slung

Dimensions (length x width x height) : App. 2800 x 2000 x 850 mm

Total weight, including oil : App. 3.3 t

Cooling : ODAF- mineral oil cooled

Installation point : Under slung

Traction Transformer Fitted Under Slung



2

Technical data Primary Side

Rated power : 1250 kVA

Nominal primary Voltage : 22.5 kV

Rated current voltage : 58 A at 22.5 kV

Technical data Traction Winding

Number : 2

Rated power : 625 kVA

Secondary Voltage : 855 V

Standard current per winding : 731 A at 855 V (prim. 22.5 kV)

Leakage inductance : 1.465 mH 10% related to the secondary

Transformation ratio : 26.32: 1

Resistance : 50 m - Related to secondary side

Magnetisation Current : 0.17 A ± 30% , Under 22.5 kV

Efficiency : 96%

Cooling surface area

: 4.37 m2

Turns Ratio : 26.294

Total Oil Volume at 20° C : 560 dm3

Winding Details

HV Winding Traction Winding

No of windings 1 2

Conductor Material Copper Copper

No of parallel conductors 1 per HV Coil associate to

traction winding, 2 Coils

in parallel

2 on each traction

winding

Total X-section 8.74 mm2 128.35 mm

2

Rated current at 22.5 kV 55.55 A 731 A

Current Density 6.4 A/ mm2 5.69 A/ mm

2

Number of layers 18 layer winding 6 layer winding

Winding Resistance (DC) at

85° C

9.135Ω 15.4 mΩ

No of Turns 2682 102



3

5.3 MAJOR COMPONENTS OF TRANFORMER



4

5.3.1 Transformer oil pump

Flow-well Oil Pump for

transformer is glandless Mono-bloc

Centrifugal type suitable for

circulating the oil. The pump has

inline suction and delivery flanges.

The pump-set is driven by 3 Phase,

50 Hz, 415 V AC supply.

General specifications:

Motor H.P. 3

Discharge in LPM 700 Total Head in Meters 10.8 Mtrs (0.9 bar)

Speed 2850 RPM Class of Insulation `H' Suction X Delivery 80 x 80 mm

Total Weight 39 Kgs.

Type 1530

Fabricant FLOWWELL PUMPS & METERS

5.3.2 Air Dryer (Breather)

The transformer is equipped

with two air driers. One is to dry the air in the oil expansion tank. The second one (smaller) is to dry the air in the bushing box.

The upper and lower parts of

air drier consist of compact casting in aluminium alloy and the transparent hose, which contains the salts (Silica-gel) and it is protected by a stainless steel cylinder drilled in such a way as to allow the visual control of salts.

The air sucked into the transformer (due to thermal

contractions of oil mass) passes through these drier.

In the lower part there is a closing system which prevents

the contact between air and salts. This closing system allows the

air passage in the two directions (inlet and outlet) only when there

is a pressure difference between the inside and the outside of the

transformer.

Silica-gel air dries are transparent tanks of salts of silicon

chemically pure, with cobalt indicator or without cobalt. Silicagel

has the purpose to absorb the air humidity signaling the reached

degree of saturation by change of colour:

With cobalt Without cobalt

BLUE = completely dry ORANGE = completely dry

PINK = =completely saturated COLORLESS = completely saturated



5

The salts contained in the dehumidifier can be taken off and regenerated by heating them at 120-150°C until they get their original colour again. When more than the half of silicagel is became pink (or colorless) (water satured) it has to be fully changed or regenerated.

5.3.3 Heat Exchanger (Radiator)

The aim of the cooling system

is to transfer the electrical losses

created within the transformer to the

outside air. Two fans provide the

necessary airflow to cool down the

circulating oil through the cooler.

The oil is pushed through the

cooler by the circulating pump.

5.3.4 High Voltage Bushing ( HT terminal)

The main insulation of the

HV bushing, Elastimold 750 S,

18/30kV is a core of solid

insulation with condenser layers

for field control. The plug is

particularly characterized by its

space saving construction and

simple assembly and disassembly.

The external cone of execution for the plug connection is

always protected by a cap when the plug is not attached.

Before the HV plug is connected, the cone of bushing must

be cleaned. No foreign bodies may be gotten jammed. While the

plug is connected, it should make certain that no air is included.

5.3.5 Earth Terminal

5.3.6 Butterfly Valves (Drain & Filling cock)

This valve is built with a aluminium casing. Sealing is realized with NBR gasket. The valve is equipped with a locking plate that indicated also the position (open or close). To operate the valve use a 19mm wrench. To lock the valve use M6 bolt or cadenas diameter 6 mm.



6

5.3.7 Ball valve

The ball valve is built in stainless steel with PTFE gasket. It

is fixed by 4 screws M10 to the tank. The exit is closed by a

1"1/4 plug. The operating arm is fixed to the tank to insure the

closed position

5.3.8 Marshaling Box (Low voltage terminal)

The connection box is IP67 box equipped with IP 68 cable gland. All electrical devices are connected in the connection box to terminal blocks.

ADO terminal block provided

to avoid wire stripping and to have

good safety and reliability. The main

point for ABB terminal blocks are:

• Elimination of conductor preparation risks • No retightening

• Vibration resistant • Corrosion resistant • A tool which guarantees a safe connection • Procedures simplification

5.3.9 Name Plate

5.3.10 Suspension Arrangement

The transformer is fixed under the coach body using rubber dampers. The rubber dampers are mounted to the transformer suspension arms by ABB Rubber dampers are chosen for their properties to limit the transmission of vibration from the transformer to the coach body and to absorb part of choc that coach body can transmit to the transformer. The arrangement also allows compensate flatness default,



7

5.3.11 Bellow (Flexible Coupling)

Bellow made from ductile metallic

materials allows misalignment and

thermal expansion of piping. The basic

element, which is a thin-walled

cylindrical tube, is formed into parallel

corrugations with hydraulic or

mechanical pressure.

The bellows are protected against

object projection (stones etc.) with

stainless plates placed in the exposed side around the bellows.

5.3.12 Thermometer Sensor

The thermometer sensor is composed

of 2 platinum resistance thermometers

PT100. The sensor is placed in oil. The

thermometer sensor is used to measure the

oil temperature in the transformer.

The sensor is screwed in a pocket,

and it is possible to change the sensor

without oil draining. For a good heat

transmission, the pocket is filled with oil.

Enough space is keep free of oil to allow

dilatation.

5.3.13. Pressure Relief Valve

The pressure relief valve (or over pressure

valve) limit the pressure in the transformer tank. The

valve open when the pressure over-pass 0.8 bar.

When the valve operates it causes a central

rod to protrude from the protective casing

commuting immediately the switch and giving an

electrical and visual signal. When the over-pressure

falls down, a spring closes the valve. But the signal

returns to its initial position only by manually pushing

inwards.

5.3.14 Oil Level Indicator

The oil level indicator is located at the

expansion tank. The indicator shows the height

of the oil level. The minimum and maximum Oil

levels are displayed and also the oil level when

the oil is 30°C.

The transformer is filled 100% with oil. The

expansion of the oil is taken up by the expansion

tank, which is connected to the transformer. The

expansion tank is installed on the side of the transformer.

The min. mark is corresponding to an oil temperature of -20°C and

max. mark is corresponding to an oil temperature of +120°C.



8

5.3.15 Oi1 level detector The oil level detector measures minimum level in the expansion

tank using floats. If the oil level becomes too low, the oil level detector switches and the transformer has to de-energized.

5.3.16 Oi1 flow sensor

The flow sensor detects a minimum oil flow. A paddle moves

related to flow volume and actuates a micro-switch.

5.4 NEW OIL CHARACTERISTICS:

Requested Value Typical Value

Density at 20° C 1.0 kg/dm3(Max) 0.876 kg/dm

3

Kinematic Viscosity at 40 35 mm2/s (Max) 7.6 mm

2/s

Flash Point Min 250° C 144° C

Pour Point Max -45° C -63° C

Water content Max 200 mg/kg < 20 mg/kg

Neutralisation Value Max 0.03 mg KOH/g < 0.01 mg KOH/g

Total Acidity Max 0.3 mg KOH/g 0.04 mg KOH/g

Total Sludge Max 0.05 %/mass < 0.02 %/mass

Break Down voltage Min 45 kV 40-60 kV

>70 kv after treatment

Dissipation Factor at 90° C, 50 Hz Max 0.03 < 0.001

DC Resistivity at 90° C Min 2 G Ωm 5 G Ωm

Dissolved Gas Analysis

Sr. No Gas Limit value in ppm ( Max)

1 CO2 12000

2 CO 1000

3 H2 400

4 CH4 (Methane) 200

5 C2H6 (Ethane) 200

6 C2H4(Ethylene) 300

7 C2H2(Acetylene) 30



9

5.5 TRANSFORMER OIL COOLING CIRCUIT

Figure: Cooling circuit diagram

Cooling System:

Make :

Type : Aluminium Plate Exchanger

Oil Volume : 20 litre

Case : Steel

Thermal data :

Air inlet Temperature : 50° C

Air outlet Temperature: 77.7° C

Oil inlet Temperature : 85° C

Oil outlet Temperature: 81.9° C

Oil flow : 655 lpm

Fan Data:

Numbers: 2

Type: Entry from Front,

Exit to the bottom.

Power consumption at rated capacity: 2 X 2.2 kVA (3.2 A)

Motor Data:

Make: ABB

Type: HX100 LB1004/2

Voltage: 3 Phase, 415 V

Low Speed High Speed

Starting Current/ Torque 450%/160% (4P) 600%/200% (2P)

Continuous Rating 0.4 kW 1.6 kW

Speed 1405 2825

Power Factor/ Slip 0.83/6.3% 0.92/5.8%

Transformer

Heat exchanger

Oil

pump



10

Monitoring System

Equipment Type Make Limit

Pressure Relief Valve T3(DN80) Sukrut 0.8 bar

Thermometer sensor Double PT100 Altop

Oil Level Indicator Float arm Sukrut

Oil Level Detector Nivofix RW1016PVK Honsberg (EU)

Oil Flow Detector UB1025HM Honsberg (EU)

Current Transformer Siemens

Maintenance Check List:

1. DGA : As specified above

2. Winding Resistance :

HV Winding : 9.135Ω

TR Winding : 15.4 mΩ

3. Insulation resistance :

Voltage Time Admissible Value at 20 ° C

1000V 30 seconds > 100 MΩ

60 seconds > 150 MΩ

CHAPTER 6

OTHER ELECTRICAL

EQUIPMENT


6.1 DC HIGH SPEED CIRCUIT BREAKER UR 6 01

6.2 AC VACUUM CIRCUIT BREAKER (VCB) 02

6.3 AC-DC CHANGE OVER SWITCH 03

6.4 SURGE ARRESTER 04

6.5 DYNAMIC BRAKING RESISTER 05

6.6 EARTHING DIS-CONNECTOR AND SWITCH 06

6.7 BATTERY AND BATTERY CHARGER 07

6.8 MINIATURE CIRCUIT BREAKERS (MCBS) 08

6.9 SWITCHES 08

6.10 SOLENOID VALVE 08

6.11 SIGNAL BELL 08

6.12 CURRENT TRANSFORMERS 08

6.13 POTENTIAL TRANSFORMERS 09

6.14 VOLTAGE SENSING DEVICE 09

6.15 GOVERNERS 09

6.16 COMPRESSED-AIR UNIT 10

6.17 AUXILIARY AIR COMPRESSOR 10

6.18 MAIN AIR COMPRESSOR 10

6.19 PANTOGRAPH 11

6.19.1 TECHNICAL DETAILS 12



1

CHAPTER 6

OTHER ELECTRICAL EQUIPMENT

6.1 DC HIGH SPEED CIRCUIT BREAKER UR 6

The UR 6 circuit-breaker is a air cooled DC high-speed current-limiting circuit-

breaker. It has been designed to ensure a trip free, rapid opening of its main contact, on

detection of a short circuit, and to quickly extinguish the arc by generating a constant

over-voltage during the whole interruption process.

The circuit-breaker is made of independent mounted sub-assemblies,

corresponding to the different functions.

1. Fixed insulating frame made of glass-fibre reinforced insulating material.

2. Main circuit, consisting of a lower connection terminal, a moving contact, an

upper connection terminal, a fixed contact with horn (24) and another horn.

3. Over-current release.

4. Arc chute.

5. Closing device and fork.

6. Auxiliary contacts assembly.

Because of its short response time following the detection of an excess current

(short-circuit, over-load detection..), it is particularly suitable for the protection of the

electrical equipment in rolling stock used on DC lines.

Make M/s Secheron

Type U6.32

Rated operational voltage 1800 V

Rated insulation voltage 2000 V



2

Rated operational current 1000 A

Conventional free air thermal current (at Temp. = 40°C) 1000 A

Rated short-circuit breaking and making capacity Iss/T

Rated time constant T1 NA

Rated time constant T2 30 kA/15 ms



Direct over-current release 0.45 - 0.9 kA

0.6 - 1.2 kA

0.9 - 1.8 kA

1.2 - 2.4 kA

1.5 - 3.2 kA

Maximum arc voltage 1.5 - 2.1 Ue

6.2 AC VACUUM CIRCUIT BREAKER (VCB)

Technical Data

Make: M/s Autometers alliance Ltd

Type: VCBA25.10Tr

Maximum rated voltage 30kV

Nominal rated voltage AC (1-Ø) 25kV

Power frequency withstand voltage (dry & wet) 75 kVrms

Lightning impulse withstand voltage 175 kVrms

Rated current 1000Arms

System frequency 50 Hz

Short circuit rupturing capacity 16kArms (440MVA)

Making current 40 kArms

Short time current capacity 16 kArms(3 sec.)

Opening time < 60 ms

Closing time < 100 ms

Control voltage 110 VDC

Input air supply pressure 4.5 to 10 kg/cm²

Rated operating sequence -- CO-3 min-CO



3

6.3 AC-DC CHANGE OVER SWITCH

The single-knife switch is designed to connect power supply from pantograph to

other circuits provided in a traction vehicle.

This switch ensures switching between two different power supply units. The

switch is mounted on traction vehicle roof. The switch incorporates a moving contact

knife fixed on an insulator and connected to a shaft which extends into a traction vehicle

area and contact springs mounted on the base plate via insulator. Under the plate, fitted

on the shaft is a lever designed to transfer the motion from a pneumatic cylinder, thus

ensuring the moving contact knife turning.

There is a split on the shaft which controls via pin and adapter four auxiliary

contact switches. The base plate contains a bracket connected via pin to the pneumatic

cylinder; a switchboard and a pneumatic electromagnetic valve 5/2 are used for the

pneumatic cylinder control. Female panel connector mounted on the holder is connected

to power leads for the electromagnetic valves and cam switches connected.

On the upper side, the plate is provided with an M8 thread for a bolt used for the

connection to a traction vehicle earthing system. Up to position of moving contact are

supplied by power from pantograph:

- contact C with the pneumatic cylinder piston rod shifted out

- contact B with the pneumatic cylinder piston rod slid in.

The switch is designed to switching power supply from the pantograph by

disengaging of moving contact (knife) from one contact spring, turning in approximately

60° and engaging into second contact springs.

Technical Data

Make: M/s Secheron

Type: RS 25.10

Main circuit

Nominal voltage UN 25 /kV/ AC

Rated insulation voltage UNm 36 /kV/ AC

Rated operating voltage Ue 27.5 /kV/ AC

Frequency f 162/3; 50 or 60 /Hz/



4

Short-time withstand current: 1s Ik 25 /kArms/

Dynamic withstand current Ip 63 /kA/

Minimum conducting current (gold) 4mA/24V DC

Breaking knife angle of turning ° 60°

Mounting position horizontal

Weight 57 kg

Control circuit

Nominal voltage 110 /V/ DC

Tolerance of auxiliary voltage -30% / +25%

Pneumatic drive

Operating pressure range 0.4 - 1 /MPa/

Dielectric test voltage: control circuit-earth

(AC 50 Hz during 60 s) 1.5 /kV/

Change-over time (at pressure 1MPa) <3sec at

-30°C; +70°C

Breaking capacity of the auxiliary contacts 1A/110V (L/R=5ms)

Breaking knife angle of turning 60°

Rated mechanical durability C3/A4 min. 250 000

operating cycles

Inspection of the Contact Spring Force

Contact springs:

Contact pressure 20 to 40 N*

Contact opening 10 mm

* Force required for the knife to be drawn out of contact springs

6.4 SURGE ARRESTER

Surge arrester protects the insulation of high voltage and medium voltage devices

against over-voltages which are caused by lightning or switching operations.



5

Surge arrester is constructed from serially connected, non-linear metal-oxide

(MO) resistors. These MO resistors have an extremely non-linear resistance property. At

the maximum operating voltage of Uc, only a small capacitive current will flow in the

mA range. With an increase in voltage, the MO resistors enter a highly-conductive state

practically without delay. Thus any further increase in voltage is limited to the specified

residual voltage values.

After the decline of the overvoltage the arrester immediately turns back to the

non- or slightly-conductive state. The MO arrester converts the energy of the surge into

heat, which it transfers to the surrounding air.

6.5 DYNAMIC BRAKING RESISTER

Technical Data

Make Heine Gmbh

Type BWD73

Nominal Resistance (Rn) 3Ω + 7% -5%

Maximum Resistance Rmax 3.96 Ω (referred to 600°C)

(Rn+ 7% + resistance rise due to

temperature rise)

Minimum Resistance Rmin 2.85 Ω: (referred to 20°C)

Inductance: 7μH at 1 KHz

Load Case-1 1600 kW (tb = 1s)

0 kW (tb =300 s)

Load Case-2 1240 kW (tb = 2.5s)

0 kW (tb =120 s)

Continuous Load 41 kW

Load Case 400 kJ (tb =100 ms)

(Intermediate short circuit) 2X within 10 s

There after shut down.

Creepage Distance ≥ 45 mm

Clearance Distance ≥ 18 mm

Energy Absorption Capacity 2456 kJ

Resistance Material CrNi2521, Strip Material



6

6.6 EARTHING DIS-CONNECTOR AND SWITCH

This earthing disconnector is designed to earth the circuits on both sides, i.e. before

and behind the main high-speed air switch in a traction vehicle. It is usually preceded by

a control group switch with a reverse lever and a pantograph locking box.

The earthing disconnector ensures safety operation of a traction vehicle and safety

of staff members while performing the traction vehicle inspection and/or maintenance,

and curing defects and/or making repairs.

On the plate face side is a control lever aimed at controlling the move of breaking

knife from one end position (Operation) to other end position (Grounded). Blocked

mechanically in a groove, the lever must first be shifted out of the groove by pulling it

towards oneself; only then it is possible to turn the lever counter-clockwise by 60°.

Mounted on the base plate back side, the switch has the fixed contact knives

connected to a traction vehicle frame through a flexible bond when in the “Grounded”

position. When in the “Grounded” position, the contact knives slides into the flexible

contacts thus making ground connection.



7

6.7 BATTERY AND BATTERY CHARGER

Power supply 110V

The EMU features a 110 volt DC on-board supply system. The battery is located

under the DTC and NDTC. The battery charger with 110 volt direct current is

accommodated in the ACU. The battery charger in the ACU only charges the battery in

the own basic unit.

The battery main switch is located in the shunting cab. This switch completely

isolates the battery from the on-board supply system. One switch per unit is provided.

Before the battery can be switched ON via the electronics cabinet in the driver's cab, all

battery main switches in the shunting cab must be switched ON. This is located in the

cabinet below the shunting desk.

Figure: Battery main switch, shunting desk

The battery voltage is monitored by a minimum-voltage relay. When a specific

voltage is reached, the driver can override it for the preparation of the unit via the

"Isolated Under voltage" switch on the driver's cab.

In the case of a defective battery, the unit can continue to operate within the train

without any restrictions. This is ensured by a battery bus-bar which leads through the

entire train.

The emergency light in the driver's cab is connected directly behind the battery

main switch. Therefore, it has to be ensured that the emergency light is switched OFF

when parking the train (battery main switch is not switched OFF, vehicle is shut-down).



8

6.8 MINIATURE CIRCUIT BREAKERS (MCBS)

6.9 SWITCHES

6.10 SOLENOID VALVE

6.11 SIGNAL BELL

6.12 CURRENT TRANSFORMERS



9

6.13 POTENTIAL TRANSFORMERS

6.14 VOLTAGE SENSING DEVICE

Technical Details

Make : Birkholz

Type : HK1.1A

Direct voltage : 1 000 V -- 4 000 V

Alternating Voltage : 25 kV 50 Hz (17 000 V -- 30 000 V)

Sr.No Type of signal Output

1 Filtered AC for more than 180 ms at AC Evaluation Unit AC

2 DC Current more than 5 mA at DC evaluation Unit DC

6.15 GOVERNERS

Sr.

No

Governor Make Type Setting

1 Main Compressor

Governor

Moller MCS-11-SOND910-G Set: 6.0 ksc

Trip: 7.0 ksc

2 Auxiliary

Governor

Moller

SMC

MCS-11-SOND910-G

ISG120-031-W

Set: 5.3 ksc

Trip: 6.3 ksc

3 Equipment

Governor

Moller

SMC

MCS-11-SOND910-G

ISG120-031-W

Set: 5.6 ksc

Trip: 4.6 ksc

4 Control Circuit

Governor

Moller

SMC

MCS-11-SOND910-G

ISG120-031-W

Set: 4.0 ksc

Trip: 3.2 ksc

5 Parking Brake

Governor

Indfos

Denfos

116X Set: 3.0 ksc

Trip: 2.0 ksc



10

6.16 COMPRESSED-AIR UNIT

The compressed-air unit consists mainly of two compressed-air circuits, which are

connected to each other by means of a non-return valve. The pantograph, AC main

circuit-breaker and the voltage change-over switch are located in one of the compressed-

air circuits (auxiliary air circuit).

In normal operation, the other compressed-air circuit (main air circuit) supplies

the auxiliary air circuit with compressed air via the non-return valve, the compressed-air

brake and parking brake system, the air suspension, pneumatic horn and windscreen

wipers.

6.17 AUXILIARY AIR COMPRESSOR

The auxiliary air compressor is

located in the HTC and generates the

compressed air required for the

operation of the components in the

auxiliary air circuit if the pressure from

the main air circuit is not available.

This is often the case when the

motorised train is being prepared.

The auxiliary air compressor is

supplied directly by the battery.

6.18 MAIN AIR COMPRESSOR

A three-phase piston air compressor

installed underneath the DTC / NDTC

supplies the train with compressed air. It is

automatically activated at a pressure of 6.0

bar and deactivated at a pressure of 7.0 bar.

The starting takes place without any

pressure.

The compressed air is lead to

several air reservoirs via a non-return valve

and an air drying system with automatic

drainage. The air reservoirs are also

equipped with automatic drainage.

One main air compressor is

provided for each unit. All vehicles are

equipped with a continuous MRP (Main

Reservoir Pipe).

In addition, several compressed-air

reservoirs for the brake, the spring-loaded

brake, the air suspension and the horn are

provided.

Auxiliary Air Compressor

Main Air Compressor fitted under slung



11

The compressed-air system is protected by a safety valve. This safety valve

triggers when a pressure of 7.8 bar is exceeded.

The motor compressor set consists of the following main assemblies:

Three-phase motor, compressor, resilient mounting and dry-type air filter. The

resilient mounting is available in the form of rubber shocks, spring wire shocks and a

combination of rubber and spring wire shocks. The compressor has rubber shocks, the

motor is equipped with spring wire shocks.

Technical Details of Motor Compressor Set

Compressor

Make : Knorr- Bremse

Type : VV120

Three cylinder reciprocating

Low Pressure Stage : 2 nos. Dia 95 mm

High Pressure Stage : 1 no. Dia 75 mm

Stroke : 60 mm

Lubrication : Oil Flash type

Oil Consumption : < 1 c.c. / operating hour

Cooling : inter cooler and after cooler

Oil capacity (Max/ Min) : 3.7 l/ 1.7 l

Max outlet pressure : 10 bar

Allowed duty cycle : 30-100%

Motor

Make : Knorr- Bremse

Type : KB/18-132MB

Voltage : 415V



12

6.19 PANTOGRAPH

It is provided to collect H.T. Supply from OHE contact wire. The OHE supply may

be 1500 VDC or 25 KV AC, 50Hz. This is fitted on foot insulator on the top of the roof

of the motor coach. The pantograph is mounted on the roof with supporting insulators.

The lightning arresters on the roof protect the unit from hazardous over voltage surges.

The current is guided via the transformer in AC operation mode or directly to the current

converter in DC operation mode.

6.19.1 TECHNICAL DETAILS

Sr.No. Item M/s Shunk M/s SIL

1 Standard UIC 60494-1

2 Type WBL 23.03 AM-18 B2

3 Min. Height with Insulators 575±10 mm 575±10 mm

4 Insulation Distance 250 mm 250 mm

5 Max Height in raised position Max. 2290 mm Max. 2290 mm

6 Maximum Extension Max. 2400 mm Max. 2400 mm

7 Operating Range 500-2000 mm 500-2000 mm

8 Width of pan head 1-17110.11856 2032 mm 2032 mm

9 Total length in resting position 2370±10 mm 2370±10 mm



13

Sr.No. Item M/s Shunk M/s SIL

10 Total weight including insulators ≈ 150 kg ≈ 290 kg

11 Current collecting strips spacing 250 ± 10 mm 250 ± 10 mm

12 Current collector - material Electrolyte copper Electrolyte copper

13 Pan base sheet thickness Old- 1.6 mm

Mod.- 2.0 mm

2.0 mm

14 Nominal Voltage 25kV AC/

1.5 kV DC

25kV AC /

1.5 kV DC

15 Nominal current 60A/1100 A

16 Maximum speed under good OHE 160 kmph 160 kmph

17 Ambient Temperature -10° C to 50° C -10° C to 50° C

18 Propulsion system Air bellow Servo motor

19 Air pressure for continuous

operation

7.0 bar 7 bar

(5<b<10 ksc)

20 Contact Pressure 11.5

(11- 14 kg

recommended)

11.5 kg

( 12 kg

recommended)

21 Raising time to maximum working

height

10 second 0 m to 1.5 m in 6-

10 s

22 Lowering time from maximum

working height

10 second 1.5 m to 0 m in 10 s

CHAPTER 7

CONTROL SYSTEM

(SIBAS 32)



2


7.1 CONTROL TECHNOLOGY 01

7.2 TRACTION CONTROLS 01

7.3 BRAKE CONTROL 03

7.4 AUTOMATIC VIGILANCE DEVICE 03

7.5 DISPLAY SUPPORT 03

7.5.1 General View of MMI (Man-Machine Interface) 04

7.5.2 Different MMI Screens. 05

7.6 MAIN TASKS OF THE TCU 09

7.6.1 Internal Structure and Method of Operation of the TCU 10

7.6.2 MVB-Communication 10

7.6.3 Higher-level Traction Functions 10

7.6.4 Control of the traction converters 10

7.7 SIBAS 32 SYSTEM 11

7.7.1 View of a SIBAS-KLIP substation 11



4



1

CHAPTER 7

CONTROL SYSTEM (SIBAS 32)

The main components of control system (SIBAS 32) are as under:

i. CCU (Central Control Unit)

ii. TCU (Traction Control Unit)

iii. BCU (Brake Control Unit)

iv. MMI (Man Machine Interface)

v. MVB (Multi Vehicle Bus)

vi. SKS (SIBAS Klip Station)

7.1 CONTROL TECHNOLOGY

The control technology was designed redundantly for this vehicle. At the heart of

each train, there are two central control units called CCU. These are located in the

driver's cab. Apart from the control of the entire train, the CCU also controls the display.

The vehicles of one unit and the units themselves are connected to each other via

an MVB (Multi Vehicle Bus). The MVB is designed redundantly with line A and line B.

If the MVB is not available despite of this fallback, the vehicle can be operated in

degraded operation via the rescue drive mode (RDM). This function is only used for

clearing the track. In this operating mode, the display is switched off and the auxiliary

tell-tale lamps are switched on.

All switches, buttons and consumers which are controlled via the control

technology are connected to a KLIP station. The KLIP stations are distributed Input/

Output stations for the CCU. They are used to significantly reduce the length of the

control lines to the CCU.

7.2 TRACTION CONTROLS

This vehicle is a three-phase vehicle which is controlled via a TCU. The TCU

processes the propulsion and braking commands (electronic brake) and transmits this

information to the current converter. If there is a TCU failure, the unit in question can no

longer operate autonomously. This does not pose a risk if the unit is part of a train, as

there may be at least one basic unit failure per train.



2

Figure 8.1: Overview of control technology / MVB bus



3

7.3 BRAKE CONTROL

All parts which affect the brake directly, except for the driver's automatic brake

valve in the driver's cab, are connected to the MVB bus. The brake commands from the

joystick/brake lever are thus transmitted to the CCU. The CCU calculates the brake

forces for the EP and the ED brake and transmits the value to the BCUs and TCUs. The

EP unit converts the brake value generated by the current into compressed air.

A pneumatic WSP (Wheel Slip Protection) is not available in this vehicle

(sliding/skidding protection is only available for the driven axles in the motor car). This

means that the driver must brake earlier if the rails are slippery in order to avoid wheel

flats.

In the case of a brake malfunction, the driver can always stop the train by moving

the joystick/brake lever into the emergency brake application position. Furthermore, the

function of the driver's automatic brake valve can be used as a fallback at any time.

If there is BCU failure or defect, the TCU takes over all of the functions.

7.4 AUTOMATIC VIGILANCE DEVICE

The automatic vigilance device has been implemented via the master controller. If

the driver releases the vigilance monitoring button during the journey, the brakes are

applied automatically and the power of the train is switched off. This only happens during

the journey. If the speed is below 5km/h, this function is disabled.

In rescue drive mode, the automatic application of the brakes is immediately

initiated even if the vigilance monitoring switch is not actuated and if the speed is below

5km/h.

7.5 DISPLAY SUPPORT

The MMI (Man-Machine Interface) is installed in the driver's cab in the DTC

and informs the driver of the current state of all important functions in the train. The

states of a function are indicated to the driver by means of coloured icons. The driver can

detect faults at one glance. The display assists the driver during the subsequent error

detection. For information on further actions, the driver can call up the corresponding

remedy for the error message.



4

7.5.1 General View of MMI (Man-Machine Interface)

1 Display ON / OFF

2 Not Connected

3 Legends of Symbols (Meaning)

4 Event Overview

5 Trouble Shooting Guidelines for Motorman

6 Not Connected

7 Brightness Control Dialog

8 Not Connected

9 Not Connected

10 Clear

11 Cursor Up

12 Cursor Down

13 Curser Left

14 Curser Right

15 Enter

16 to 25 Soft keys 0 to 9

Figure 8.2: Man Machine Interface (General View)



5

7.5.2 Different MMI Screens.

A. Top level screen

B. Unit Screen

1 Train No. Not commissioned

2 Screen designation

3 Date

4 Time

5 Main screen

6 Massage text

7 Short massage

8 Soft keys

9 Short massage

Figure 8.3: Top level screen

Figure 8.4: Unit Screen



6

C. Driver / Brake Screen showing percentage traction / Braking

D. Legend of Indications (By pressing ‘i’)

Figure 8.5: Driver / Brake Screen showing percentage traction / Braking

Figure 8.6: Legend of Indications (By pressing ‘i’)



7

E. Legend of Indications (By pressing ‘i’ & 2)

Figure 8.7: Legend of Indications (By pressing ‘i’ & 2)



8

F. Legend of Indications (By pressing ‘i’ & 3)




9

G. Legend of Indications (By pressing ‘i’ & 4)

7.6 MAIN TASKS OF THE TCU

The Train Control Unit (TCU) of the SIBAS 32 S system is used for processing,

evaluating, storing and transferring data and signals in electric rail vehicles. The main

tasks of the TCU for the EMU are listed as follows:

Data exchange via the MVB-Communication Module with the other Basic Units of

the train set.

Data exchange via the MVB with ACU, BCU, KLIP etc. of the own 3-car-basic-unit

Control of power switches

Control of the defined tractive and regenerative braking effort

Generation of control signals for the traction converters

Monitoring (power switches, current, voltage, temperatures etc.)

Diagnostics

These tasks are fulfilled by TCU via hardware and software components inside the TCU.

1 PIS MMI

2 Train radio hands-free

module

3 Train Radio MMI

4 Pressure Gauge

Parking Brakes

5 Train radio Handset




10

7.6.1 Internal Structure and Method of Operation of the TCU

The TCU consists of a combination of electronic devices in a forced-air cooled

rack. The connection to the vehicle environment is implemented by front plugs.

The TCU SIBAS 32 S of the EMU vehicle consists of a Central Processing Unit

(CPU) and three lower-level sub-computers (signal processors). The CPU fulfils the

Higher-level Traction Functions.

The three signal processors implement the Control of the traction converters

itself. There are two signal processors for the two Pulse Width Modulated Inverters

(PWMI) and one signal processor for the two Four Quadrant Choppers (4QC).

7.6.2 MVB-Communication

With the help of the MVB-Communication Module (located on the CPU-card) the

CPU exchanges relevant signals with the other MVB stations of the own Basic Unit (like

BCU, ACU, KLIP, etc.). Also the communication with the other 3-car units in the train

set is realized with the MVB-Communication Module.

7.6.3 Higher-level Traction Functions

The central processing unit (CPU) also controls the higher-level functions of the

traction system. In response to the driver’s controls (e.g. driving set point) the CPU

determines the required power flows and thus generates set points for the two 4QC (not

operated in DC-mode) and the two PWMIs. The CPU enables closure of the main circuit

breakers and controls the state of various internal breakers and also wired train lines.

Therefore the CPU is able to input and output binary Signals via the internal bus

with the help of Binary Input/ Output Devices. The CPU provides monitoring and

protection functions to detect faults in the system. When a fault is detected appropriate

action is taken to ensure the system remains safe and to limit consequential damage.

Diagnostic information is provided to the train driver and to maintenance staff.

With the help of a Service PC and a special software tool (SIBAS Customer Monitor) the

diagnostic information of the TCU diagnosis memory can be read out and further

maintenance tasks can be fulfilled.

7.6.4 Control of the traction converters

Each of the signal processors implements the software control algorithm required

to generate the power semiconductor firing pulses in response to the set point values from

the central processing unit. Because the signal processors perform all time-critical

functions of the traction closed-loop control and converter open loop control, the CPU is

relieved of computationally intensive tasks.

Each of the signal processors interacts with special interface devices e.g. in order

to actuate the power semiconductors and to read in actual drive values like voltages,

currents, temperatures etc.



11

7.7 SIBAS 32 SYSTEM

(SIEMENS RAILWAY AUTOMATION SYSTEM WITH 32 BIT MICRO-

PROCESSOR)

The SIBAS 32 system (Siemens Railway Automation System with 32 bit

microprocessor) is employed for modulating and logic control functions in mass transit

rolling stock such as light rail vehicles (trams), underground railways, suburban rapid

transit vehicles and trolley buses, as well as in long-distance vehicles, for example, high-

performance locomotives, high-speed trains diesel-electric locomotives.

The system controls, monitors and protects the vehicle drive in the area of the

converter equipment and performs the information processing in a control level

embracing the whole vehicle as the central control unit.

The recording and control of digital and analog process signals "locally" at the

vehicle control is realized using SIBAS-KLIP.

SIBAS-KLIP comes from the German for "intelligent terminal for peripheral

interfacing".

The peripheral signals in the vehicle are hereby connected to the I/O module of

the SIBAS-KLIP substation (SKS) by means of front connectors and are connected to the

multifunction vehicle bus (MVB) through the AS 318 MVB interface via the vehicle

control.

7.7.1 View of a SIBAS-KLIP substation

The following picture shows two SIBAS-KLIP substations arranged above one another:

CHAPTER 8

BOGIE & UNDER GEAR


8.1 INTRODUCTION 01

8.2 BOGIE FRAME 01

8.3 WHEEL & AXLE 02

8.4 ROLLER BEARINGS 03

8.5 AXLE BOX HOUSING 04

8.6 AXLE BOX SPRINGS 04

8.7 LOWER SPRING SEAT 04

8.8 DASHPOTS AND AXLE GUIDE ASSEMBLIES 05

8.9 BOLSTER AND BOLSTER SPRING 05

8.10 HYDRAULIC SHOCK ABSORBERS 05

8.11 RUBBING PLATE IN MC AND HCC BOGIE 06

8.12 EQUALISING STAYS 07

8.13 CENTRE PIVOT (MC & HCC bogie) 08

8.14 CENTRE PIVOT (Trailer Coach) 09

8.15 SIDE BEARERS 10

8.16 ANCHOR LINKS (Trailer bogies) 11

8.17 HANGER AND HANGER BLOCKS 11

8.18 BOGIE BRAKE GEAR 12

8.19 BUFFING & DRAW GEAR 13



1

CHAPTER 8

BOGIE & UNDER GEARS

8.1 INTRODUCTION

The bogie frame is a welded construction with two longitudinal girders and a

cross bar and two frame ends. The tractive or brake force is transmitted via a bogie pin

from the bogie to the body.

The frame ends are used to take up the brake cylinder and the brake rigging. This

vehicle features tread brakes, which have a direct effect on the wheel.

Furthermore, 4 steel cables are each located between body and bogie. These are

used as a lifting supports.

For primary suspension, buffer height, brake rigging, wheel and axle, hydraulic

shock absorbers of AC EMU, DC EMU, AC-DC EMU bogie refer CMI – K001 (April

2000) and amendment slip no.1(Feb. 2007) and for maintenance of air suspension refer

CMI-9802 (Rev.2) , February 2008 issued by Carriage Directorate, RDSO, Lucknow .

8.2 BOGIE FRAME

(Ref: CMI- K001)

Bogies of motor coaches (MC), high carrying capacity coaches (HCC) and trailer

coaches (TC) are of all welded, light weight construction. The axles, with self aligning

roller bearings mounted inside cast steel axle boxes, are rigidly guided by telescopic dash

pot and axle box guide assemblies.

Helical springs working in parallel with dashpots are used for primary suspension.

Coach body is supported on two side bearers located 1700 mm (TC) and 1200 mm (MC

& HCC) apart on a floating bogie bolster which in turn rests on air spring supported on a

spring plank hung on swing links from bogie frame. The air springs at each end of bolster

are damped by hydraulic shock absorbers. Side bearers consist of metal slides immersed

in oil baths well protected from dust ingress.

Primary

springs

Secondary air

suspension Lifting support



2

Refer drawing no. ICF/MRVC/M-0-0-001 (sheet 1 & 2), AC/DC EMU/D2-0-0-

201 (sheet 1 & 2) and AC/DC EMU/C2-0-0-201 (sheet 1 & 2) for bogie general

arrangement of motor coach, D coach and C coach respectively given in Annexure for

drawings.

Refer drawing no. ICF/MRVC/M-0-3-001 (sheet 1 & 2) and ICF/MRVC/D-0-3-

001 (sheet 1 & 2) for bogie frame arrangement of motor coach and D/C coach

respectively given in Annexure for drawings.

No weight is transferred through the bogie (center) pivot, which is located in the

centre of the bolster. The pivot acts merely as a centre of rotation and serves to transmit

acceleration and retardation forces.

The floating bolster in TC bogie is secured in the longitudinal direction to bogie

frame by means of two anchor links with silent block bushes, located diagonally opposite

to each other and transmit draw and braking forces between bogie frame and coach body

through the centre pivot. The MC & HCC bogie bolster is located between bogie

transoms and transmits draw and braking forces through rubbing plates fixed at the

bolster ends.

8.3 WHEEL & AXLE

The EMU coaches are provided with composite design of wheels consisting of

rolled steel wheel centres with renewable tyres. The tyres of TC bogies are fastened to

the wheel disc with glut rings whereas the MC/ HCC bogies have, in addition to the glut

rings, 4 locking keys to ensure more positive securing.

Refer drawing no. ICF/MRVC/M-0-2-001 for axle and wheel set given in

Annexure for drawings.



3

Tyre Profile

1. The new/re-turned tyre profile shall be as per ROSO Sketch No. 91146 atl. 2.

2. The condemning limits for the flange wear, root wear, deep flange, sharp flange, hollow

tread wear and flat surface on tyre shall be as per the condemning gauge shown in plate

45 of I.R.CA Part IV.

3. Wheel gauge should be within the tolerance of +2/-1 mm.

Wheel Diameter

Bogie New Condemning Last Shop Issue Size

1. MC 952mm 877mm 885mm

2. TC 952mm 857mm 865mm

3. HCC 952 mm 865mm 873mm

Permissible Variation on Wheel Tread Diameter

The permissible variation in tread diameter of wheels at the time of tyre turning or wheel

replacement are as follows:

1. Wheels of the same axle : 0.5mm

2. Wheels of the same bogie : 5.0mm

3. Wheels between two bogies under the same coach : 13.0 mm

No separate service limits are specified as the above figures have been fixed to allow for

the differential wear likely to develop between successive tyre turnings/ wheel changing.

It is, therefore, not necessary to withdraw EMU/MEMU stock from service specifically

for restoring the differential between wheel diameters to be within the prescribed limits.

Material Specification for Wheel and Axle

The material specification applicable to the wheels and tyres are as follows:

1. Tyres : IRS Specification R-15/95.

2. Axle

: IRS Specification R-16/95 for TC bogies

IRS Specification R-43/92 for MC & HCC bogies

8.4 ROLLER BEARINGS

MC & HCC Bogies are fitted with direct mounted, double row, self aligning roller

bearings No. 22328 C/C3. TC Bogies are fitted with direct mounted, double row, self

aligning roller bearing No. 22326 C/C3.

Refer drawing no. EMU/M-0-2-016 (sheet 1 & 2) and EMU/M-0-0-001 (sheet 1

& 2) for roller bearing of motor coach, D coach/C coach respectively given in Annexure

for drawings.



4

8.5 AXLE BOX HOUSING

Double row self-aligning spherical roller bearings are housed in accurately

machined cast steel axle boxes. The axle boxes are also provided with light alloy front

and back covers secured by four bolts.

Refer drawing no. ICF/MRVC/M-0-2-002 (sheet 1 & 2) for axle roller bearing

housing and gear-wheel assembly of motor coach given in Annexure for drawings.

Axle boxes and covers should be thoroughly cleaned and checked for cracks

particularly at the holes of the covers which have shown proneness to failures. The bolts

should be examined for worn threads, straightness, etc. before re-use and should be well

tightened and locked by spring washers and split pins to ensure that the covers and the

axle box housing form a water tight assembly and protect bearing from dust and

moisture.

8.6 AXLE BOX SPRINGS

Axle box springs are of helical type manufactured from centreless ground chrome

vanadium, silica manganese steel. These springs are also shot-peened to obtain higher

fatigue life. It is necessary to check these springs for cracks and measure their free height

to ensure that they meet the design requirements.

All springs shall be grouped in three categories and used on bogies as per

instructions detailed in RDSO Technical Pamphlet No.C-8419 (Rev 1).

8.7 LOWER SPRING SEAT

Lower spring seat on the axle box wing in which guide bush of dashpot moves up

and down does not normally wear in service. In the absence of inadequate quantity of oil

in the dashpot. the inside surface is likely to wear. If the surface is worn more than 0.4

mm in diameter or if the surface is scored or otherwise damaged, the lower spring seat

should be reclaimed.

All lower spring seats should be carefully checked for cracks before reuse.



5

8.8 DASHPOTS AND AXLE GUIDE ASSEMBLIES

Axle box guides are accurately machined hollow forgings welded to the bogie

frame to ensure that the wheel sets are rigidly guided in parallel. These guides are fitted

with acetal/ bronze bush at the lower end for close guidance of the wheel set both in

lateral and longitudinal directions. The lower spring seat is filled with oil and the

assemblies sealed with rubber ring to make it oil tight.

The provision for topping-up oil in the dashpot of MC & HCC bogie are made. In

the trailer coach bogies, holes on the bogie side frame above each guide are provided to

top up the damping fluid when required.

Refer drawing no. AC/DC EMU/M2 -0-1-201 for axle box guide given in

Annexure for drawings.

8.9 BOLSTER AND BOLSTER SPRING

Bolster rested on both ends on air springs as shown below. More details are given

in chapter on ”Suspension”.

Refer drawing no. ICF/MRVC/M-0-4-001 (sheet 1 & 2) and DMU/DPC/10-0—4-

001 (sheet 1 & 2) for bogie bolster arrangement of motor coach, D coach/C coach

respectively given in Annexure for drawings.

8.10 HYDRAULIC SHOCK ABSORBERS

The hydraulic shock absorbers are fitted to work in parallel with bolster springs.

These shock absorbers normally give trouble-free service and require no attention in

between POHs. However, shock absorbers which are found either leaking or physically

damaged should be replaced.



6

As the resistance of these shock absorbers is likely to deteriorate in service, it is

necessary to attend to them as per instructions given in the manufacturer's maintenance

manual.

8.11 RUBBING PLATE IN MC AND HCC BOGIE

Nylon rubbing plate has been fitted to the bolster which serves as cushion

between the bolster and bogie frame. Initial clearance of 1mm on each side has been

provided between the nylon rubbing plate and steel rubbing plate.

During POH,' this clearance must be maintained by fitting steel packings of

suitable thickness. During service, this clearance should not exceed 3mm on each side.

Any higher clearance may cause excessive longitudinal oscillations and may strain stay

tubes (connecting the bolster to the spring plank) and cause their breakage.

Vertical and Horizontal Shock Absorbers



7

8.12 EQUALISING STAYS

Equalising stays connecting the spring plank and bolster, pin jointed at both ends,

have been provided to prevent lateral thrust on bolster springs. It is necessary to remove

the pins at every POH, clean and oil them to ensure that they are free to rotate when re-

assembled.

Any restricted movement at these joints is likely to prevent free movement of

bolster. The free movement of pins can be ensured by greasing the assembly.

The pins should be provided with washers and split pins to ensure that they do not

fall out in service.

Figures given for Equalising stays of MC / HCC and TC bogies:



8

8.13 CENTRE PIVOT (MC & HCC bogie)

The centre pivot arrangement is shown in Fig. given below. The body bolster of

the under-frame is provided with a bush of inner dia 90mm in the top and 150mm dia

hole at the bottom and the centre pivot pin, when fitted to the body bolster, perfectly fits

into these holes as shown in diagram given below.

Any wear due to bogie rotation is taken up by the upper and the lower bushes

between the centre pivot pin and the bogie bolster.



9

8.14 CENTRE PIVOT (Trailer Coach)

The centre pivot arrangement is shown below. It is not designed to transmit any

vertical load but transmits only tractive and braking forces.



10

8.15 SIDE BEARERS

Side bearers consist of a hard wearing ground steel plate immersed in an oil bath

with a floating bronze wearing piece, which has a self aligning spherical top surface on

which the body rests and transmits the vertical load. The oil well is provided with a cover

to prevent ingress of dust.

The hard ground plate and the spherical bronze wearing piece are likely to wear in

service. The hard ground plate should be renewed when the wear exceeds 1.5mm or

ridges are observed on the plate. The bronze wearing piece should be renewed when the

wear on the mating surface reaches 3 mm or damages occur to the oil grooves. Sharp

edges which are known to develop at the periphery of the wearing pieces are likely to

impair lubrication and should be rounded off before re-using.

For filling up oil in side bearer without lifting the coach, oil filling nipples have

been provided on the oil well.

Any of the following oils can be used for the side bearers and the quantity

required per side bearer is 2.5 litres.

IOC : Servoline-68

HPC : Yantrol-68

BPC : Bharat Univol-68



11

8.16 ANCHOR LINKS (Trailer bogies)

Anchor links should be carefully examined for cracks at the weld. The rubber in

the silent bloc should also be carefully examined for deterioration. Appearance of fretting

on the edges of the rubber is an indication of deterioration of rubber.

Whenever a silent bloc is to be replaced, it must be from those that have been

duly tested. To avoid pre-loading of the anchor link while assembling on the bogie,

ensure that the assembly can be done without forcing the link into position. This can be

done conveniently after lowering the body on the bogies.

8.17 HANGER AND HANGER BLOCKS

Hanger and hanger blocks shown in Fig. given below should be thoroughly

cleaned after dismantling and examined carefully for cracks /wear and other damages.



12

The extent of permissible wear on these components is indicated below:

(Ref: CMI - K001)

Trailer bogie

Components Size New Condemning Wear Shop issue

size

Hanger block 8 6.5 1.5 7.00

Pin 45 43.5 1.5 44

Hanger 354 357 3 355.5

Motor bogie

Components Size New Condemning Wear Shop issue

size

Hanger block 9.5 8 1.5 8.5

Pin 45 43.5 1.5 44

Hanger 246 249 3 247.5

8.18 BOGIE BRAKE GEAR

Maximum radial clearance of 1 mm between the brake gear pins and bushes is

permitted. If the clearance is more, the worn out part should be replaced and the standard

clearance to be maintained.

Brake block should be replaced when they wear out to thickness of 16 mm by

removing the looped key from the brake head.

An adjusting palm pull rod with holes displaced at regular intervals is provided in

the brake rigging to take up slack in rigging due to tyre wear. Adjustment should be done

by relocating the pin in different holes on this palm pull rod.

Refer drawing no. EMU-M-3-2-064 (sheet 1 & 2) bogie brake arrangement for

20T axle bogies given in Annexure for drawings.



13

8.19 BUFFING & DRAW GEAR

The EMU/MEMU coaches are provided with semi permanent/semi automatic

schaku couplers. These are to be maintained as per the instructions contained in the

Maintenance Manual supplied by the manufacturers.

CHAPTER 9

SUSPENSION


9.1 SUSPENSION 01

9.2 AIR SUSPENSION 02

9.3 WORKING PRINCIPLE OF PNEUMATIC (AIR) SUSPENSION 02

9.4 ADVANTAGES OF AIR SUSPENSION 03

9.5 CHARACTERISTICS FEATURES OF AIR SUSPENSION 03

9.6 CONSTRUCTION DETAILS 04

9.7 SCHEMATIC LAYOUT OF PNEUMATIC SUSPENSION CONTROL

EQUIPMENT 05

9.8 OPERATING & MAINTENANCE INSTRUCTIONS 05



1

CHAPTER 9

SUSPENSION

9.1 SUSPENSION

The bogie features two types of suspension, a primary and a secondary. The

primary spring are arranged in parallel as coil springs.

Each coach having two bogies provided with 16 Nos. of metal bonded conical

rubber spring (8 Nos. per bogie) between the bogie frame and axle box which acts as a

primary suspension system. Each metal bonded conical rubber spring is subjected to

variable, heavy duty dynamic loading in vertical, lateral and longitudinal direction during

running.

To increase ride comfort, a secondary spring was fitted. This type of suspension is

an air spring suspension. In the event of a defect (mechanical damage), this can be

disabled via a shut-off valve. This is located below the body. The bogie was equipped

with an air spring valve. This ensures that the same body height is maintained

independent of additional load.

Furthermore, additional damping was provided on the secondary spring in the

form of an hydraulic shock absorber to avoid rocking movements.

Fig.: Primary spring suspension

Fig.: Secondary air spring suspension



2

9.2 AIR SUSPENSION

(Ref: CMI-9802 (Rev.2), February 2008)

Carriage Directorate of RDSO has issued CMI-9802 (Rev.2), February 2008 for

“Maintenance Instructions on Air Suspension for DC, AC & AC-DC EMU/HHP DMU

Coaches”. This CMI may be referred for details.

9.3 WORKING PRINCIPLE OF PNEUMATIC (AIR) SUSPENSION

Air suspension is a suspension where properties of air are used for cushioning

effect (springiness). Enclosed pressurized air in a pre-defined chamber called air spring,

made up of rubber bellow & emergency rubber spring, provides various suspension

characteristics including damping.

Air springs are height-controlled load leveling suspension devices. With changing

loads, air spring reacts initially by changing the distance between air spring support and

vehicle body. The height monitoring valve (called leveling valve) is in turn actuated,

either taking the compressed air pressure to the air spring or releasing air pressure from it

to the atmosphere. This process continues until the original height is restored as shown in

figure given below:

Working Principle of Pneumatic (Air) Suspension



3

This mechanism ensures a constant floor height on coaches provided with air

springs, irrespective of the load. This greatly reduces problems associated with low

buffer/ coupler heights.

9.4 ADVANTAGES OF AIR SUSPENSION

• Capable to sustain Super Dense Crush Loads typical of suburban traffic.

• Maintain constant floor height of coach.

• Provide superior ride comfort.

• Virtually constant natural frequency from tare to full loads, reducing passenger fatigue.

• Isolation of structure borne noise, this improving comfort.

• Improved reliability, reduced maintenance effort.

• Flexibility to choose characteristics as per requirement at design stage.

9.5 CHARACTERISTICS FEATURES OF AIR SUSPENSION

• Soft flexible characteristics in vertical direction - Achieved by compression of air.

• Excellent lateral spring characteristics, as desired - Achieved by variation in effective

area in lateral direction.

• Avoids excess air consumption due to instantaneous modes of vehicle oscillation or

change in air pressure - Achieved by designing delayed reaction leveling valve.



4

9.6 CONSTRUCTION DETAILS

Construction details of air spring are shown in figures given below for air spring

with outside emergency spring & air spring with inside emergency spring.

AIR SPRING WITH OUTSIDE EMERGENCY SPRING

AIR SPRING WITH INSIDE EMERGENCY SPRING



5

9.7 SCHEMATIC LAYOUT OF PNEUMATIC SUSPENSION CONTROL

EQUIPMENT

A schematic layout of pneumatic suspension control equipment has been provided

in Fig.7 at page no. 17 of CMI 9802 which is reproduced below:

9.8 OPERATING & MAINTENANCE INSTRUCTIONS

Operating Instructions

o Motorman to maintain 7 bar pressure in compressor.

o In case of heavy leakage of air from air spring system, Isolate the affected bogie

and observe speed restriction at 50 kmph up to the terminal point for

maintenance.

Inspection & Maintenance Of Air Spring

o Inspect for any water collection in rubber bellow of air spring.

o Inspect the air spring for any damage or leakage.

o Inspect air spring seat and top plates for corrosion, if corrosion noticed, paint with

primer & black paint.

Inspection of Pipe Line

o The air spring piping may be checked for any leakage/damage by soap test and

repair if required.

Inspection & Maintenance of Lower Spring Beam

o Inspect all welding joints of the lower spring beam (cradle) and repair if required.

o Inspect air spring fixing holes of lower spring beam for elongation, if elongated

build them to dia.I3 mm or dia. 22 mm.

o Inspect the corrosion on top surface of lower spring beam, Remove the corrosion,

paint with primer and black paint.



6

Test for Leakage

• Connect the hosepipes on the under frame piping with the leveling valves of the

bogies.

• Connect pressure gauges to the drain plug locations of I50-litre reservoir.

• Provide packing in the gap between bolster & bogie frame.

• Connect the 150-litre reservoir on the under frame to the compressed air source

of pressure 9.0 kg/cm2.

• Allow air into the air springs to a value of 9.0 kg/cm2

in the pressure gauge by

adjusting the horizontal lever of the leveling valve and keep it in the same

position.

• Close the isolating cock connecting MR pipe with 150 litre reservoir.

• Test all pipe joints for leakages.

• Check the pressure gauge readings after one hour. The pressure drop should be

within 1% of the test pressure 9.0 kg/cm2.

• Release the air completely by dropping the horizontal lever.

• Remove the packing.

CHAPTER 10

BRAKE SYSTEM



1



2

CHAPTER 10

BRAKE SYSTEM 10.1 BRAKING SYSTEM

The vehicle is equipped with several brake systems. Normally, the joystick/brake

lever (Master Controller) is used for braking the vehicle. This lever can also be used for a

rapid application of the brakes in the event of an emergency.

This system uses the EP brake system. To use this system in the best possible

way, one Brake Control Unit (BCU) is provided per unit. The BCU controls the brake

force of the units. If the BCU fails, the TCU will perform the functions of the BCU.

An indirect brake, which can be operated via two automatic brake valves, serves

as a fallback. One is used by the driver, the second one by the guard.

The vehicle mainly uses the electric brake. With this brake, the generated brake

force can be returned back into the contact line network (OHE). If the brake force cannot

be fed into the network, the brake current is commutated to a brake resistance and the

magnetic drag is reduced to 0 kN within 1 sec. As a next step, the electro-pneumatic

brake takes over the magnetic drag.

To secure the parked units, a spring-loaded brake has been installed. It acts on all

4 axles of the DTC/ NDTC. The brake can be applied or released via push buttons

provided in the driver's cab. In the case of a fault, the spring-loaded brake is locked by an

air shut-off cock. In this case, the driver has to release the brake by hand via the

emergency release device.

The pneumatic brake is already connected from 15 km/h (due to idle time of the

EP brake). Furthermore, the electronic brake force is reduced depending on the speed

(between 15 to 3 km/h). If the speed drops below 3km/h, the EP brake is automatically

reduced.

The term "special brake blending" refers to the proportional reduction of the

electronic brake while the compressed-air brake is increased.



3

Figure: Set-up of the EP unit



4

Figure: Set-up of the brake system DTC – MC – TC



5

Figure: Set-up of the brake system NDTC – MC – TC



6

Figure: Overview of spring-loaded brake

The spring-loaded brake is suitable for securing the units. It acts on the two

bogies of the DTC / NDTC. Compressed air is required to release the brake. In the case

of a broken or defect hose, the spring-loaded brake is applied automatically. However,

this fault can be eliminated via the emergency release device, i.e. one funicular traction

per spring-loaded brake on the bogie. It is no longer possible to apply the spring-loaded

brake after a fault of this kind. In addition, the shut-off cock of the spring-loaded brake

must always be shut-off for an emergency release.

Air reservoir

Emergency

release

device

Holding

valve

Compressed-

air brake

cylinder

Spring-loaded brake cylinder

BP connection

Solenoid valve

Manometer in

the driver's

cab

Figure: Shut-off cock of the spring-loaded brake and emergency release device

Release device

Shut-off cock of the spring-loaded brake

CHAPTER 11

PASSENGER AMMENITIES


11.1 COACH FANS 01 11.2 AIR VENTILATION & MAIN BLOWER UNITS 01 11.3 COACH LIGHT 02 11.4 PASSENGER INFORMATION SYSTEM 02



1

CHAPTER 11

PASSENGER AMMENITIES

11.1 COACH FANS

Technical data

Sr.No. Description : Coach Fan AC-DC EMU

1 Make : M/s Raman Sinha ( Shankar)

2 Voltage : 98-135 V AC, 50 Hz AC

3 Power : 65 W

4 Power factor : 0.9

5 Sweep : 450 mm

6 RPM : 1200

7 Air Delivery : 85 m3/ min

8 Wire mesh & Body : Aluminium

9 Fan Blade : Nylon

11.2 COACH LIGHT



2

11.3 AIR VENTILATION & MAIN BLOWER UNITS

Make Siemens

Type 2CS7 352-8RG11-1EM8

Motor Make Siemens Motor

Type of motor 1PP9083-2LA99ZN03

Nominal voltage 3AC, 415V ±10% @ 50Hz

Starting current and torque 24.4A / 22.0Nm

Continuous rating (at shaft) 1.75kW

Speed (at rated power) 2840 rpm

Power factor and slip of the motor

(at rated power) 0.82 slip: 5.3%

Power consumption at rated capacity

(Working point) 1.6 kW

Output power at shaft (working point) 1.25 kW

Efficiency at rated capacity Motor 77.5 %

Blower 49%

11.4 PASSENGER INFORMATION

SYSTEM

Display unit

CHAPTER 12

MAINTENANCE SHEDULES

FOR

AC – DC EMU (SIEMENS)


6.1 DC HIGH SPEED CIRCUIT BREAKER UR 6 01



1

CHAPTER 12

MAINTENANCE SHEDULES FOR AC – DC EMU (SIEMENS)

REF: SMI for uniform periodicity of maintenance schedules for EMU (AC & DC)

&MEMU coaches (ref: RDSO / PE / SMI / EMU / 0037 -2007, Rev. 0, April 2007)

1. The various maintenance schedules periodicity for AC EMU/MEMU stock as

given below should also be applicable to AC – DC EMU stock plying in Mumbai

area.

2. Due attention to be paid to passenger amenities items mentioned in para ‘B’ from

trip inspection onwards.

LEGENDS USED:

TI Trip Inspection

POH 18 months Inspection

IA 45 Days Inspection

IC 180 Days Inspection

TYPE OF SCHEDULE AND PERIODICITY FOR AC, AC - DC EMU/MEMU

Type of Schedule Periodicity

Daily/ Night -

Trip Inspection (TI) 10 Days

IA 45 Days

6 Monthly (IC) 180 Days

POH 18 Months

12.1 CLEANING SCHEUDLE

Washing of exteriors & wet mopping of interiors shall be done during trip

inspection and brooming must be done at night stabling points every day.

12.2 ITEMS FOR DAILY CHECKING AT NIGHT STABLING POINTS (Ref: RDSO / PE / SMI / EMU / 0037 -2007,Rev. 0, April 2007)

1. Visual Inspection of wheels for cracks, checking of axle boxes, its cover and bolts.

2. Check axle guide springs, air springs, bogie frame and all brake riggings. Also

check schaku couplers and side buffers.

3. Check brake blocks for their position and replacements if required.

4. Drain main reservoirs.

5. Check main compressor for their oil level.



2

6. Check gear case suspension housing bolts etc.

7. Check all compartment lights & fans.

8. Check and test horns, wiper, dead man device, guard emergency brake.

9. Check and clean head code, look out glasses.

10. Check fire extinguishers, locking of HT compartment, driving cabs.

11. Ensure all indications lamps functioning.

12. Formation testing from both the ends and brake testing.

13. Check for all hoses, air pipes.

14. Specially check headlights, taillight and flasher lights.

15. Check for battery voltage.

16. Visual check for any oil leakage from transformer, radiator and pipe lines.

17. Go through the motorman logbook and attend the defects booked during the run.

18. Record in the logbook any other abnormalities, which need attention in shed, but

ensure safety and reliability.

Para ‘B’ (SMI / EMU / 0037 -2007) Passenger Amenities Items

Due attention to be paid to passenger amenities items mentioned below from trip

inspection onwards.

S. No. ITEMS

1. Broken seats and seats frame.

2. Worn out / broken chequered plates in doorways.

3. Missing glass and louver shutter including complete window frame.

4 Missing doors.

5. Worn out / tilted foot steps

6. Missing overhead handles and hand rails.

7. Breakage of FRP panel (interior panels).

8. Missing of different types of angles/ moldings.

9. Missing of seat fittings.

10. Missing of tread plate of door.

11. Missing of luggage rake.

12. Missing of notice plates and ACP handles.

13. Condition of chequered plates.

14. Proper head code working.

15. Proper working of compartment Light & Fan. Changing of defective lamp,

fan fitting etc.



3

12.3 TRIP INSPECTION SCHEDULE (10 Days) ELECTRICAL

Sr. Items to be checked Remark

1.0 Driving cab

i) Check E-Cabinet for any isolation of Switches &

MCBs.

ii) Down load fault events from both CCUs and all the

TCUs and analyze for faults.

2.0 Light & Fan

i) Check operation of Lights, Fans and Ventilation

switches on both positions 50% &100%.

ii) Check the working of all Fans and Lights in the

coaches. Attend the defects noticed.

iii) Check working of Signal Bell / Emergency Bell &

indication LEDs.

iv) Check working of Flasher, Tail & Blinker Light and

ensure smooth operation of their Push Buttons.

v) Check working of Head Light & Auxiliary Head

Lights at both Dim/ Bright positions.

vi) Check working of DC-DC Converter for Head Light

on both normal and standby positions.

vii) Check working of Cab Light, Emergency Cab Light,

Spot Light & Cab Fans.

viii) Ensure smooth operation of all push buttons &

switches in the D/ Cab.

3.0 Battery

i) Check & record Battery Voltage of individual unit by

operating "TEST BATTERY VOLTAGE" push

button in motor coach shunting cab.

100V to 110v

ii) Check for intactness of Battery Box mounting

Bracket and Bolts.

4.0 Transformer

i) Check oil level. Check for any oil leakage.

ii) Check for any hitting / damage signs.

iii) Check intactness of Transformer Mounting Bolts and

availability of safety slings.

iv) Check the colour of silica gel. Orange -ok ,

Grey- Not OK

6.0 Control and Switch Gear

i) Check all MCBs & Switches for normal position on

the E-Cabinet in the Motor Coach.

ii) Check for set condition of Motor Protection Switch

(MPS) in all the end panels.

iii) Ensure proper locking of panel doors of E-Cabinet in

D/cab & MC, End wall panels in all the coaches.



4


iv) Ensure proper position of MVB

segment address selector switch

in all motor coaches.

Rake U1 U2 U3 U4

9 Car 0 1 5 -

12 Car 0 1 2 5

15 Car 0 1 2 3

7.0 Roof Equipment

i) Check for any signs of external hitting/ damages/ cracks

on pantograph and other roof equipment.

ii) Check for any OHE rubbing marks on panto pan below

Red mark.

iii) Check thickness of copper Wearing Strips. It should be

above condemning size. > 3mm

iv) Check that wearing Strips are without Sharp Edges and

ensure Screws are not projecting above the wearing

strips and are properly secured.

v) Check that there is no Gap between the Main wearing

and End wearing Strips.

vi) Ensure availability of all Bolts, Nuts, Lock-Nuts, Spring

Washers, Split pins etc. of various fittings.

vii) Ensure intactness of middle Articulation Assembly

shaft check nut.

ix) Check Bow Plunger is sliding freely while pressing and

split pins are available (SIL). Check Rocker assembly

for free movement (Schunk).

x) Check the Control Box, Rubber Bellow & Rubber/PU

Pipe for any air leakage. (Schunk) Check the Servo

motor, Throttle Valve, Magnet Valve for Any air

leakage. (SIL)

xi) Check Horizontal Damper for Oil Leakage and smooth

operation (Schunk).

xii) Check for free movement of servo motor piston rod and

eyelet rod. (SIL)

xiii) Ensure availability of all flexible shunts and check that

strands are not broken.

xiv) Ensure provision of steel bracket on lower articulation

to prevent earthing of anti balancing tube after

uncoupling.

xv) Check whether rubber stopper on the base frame and

MS bracket on lower articulation is provided to prevent

over turning of panto in unwired section (SIL).

xvi) Check & record Raising and Lowering time of

antograph 6-10 Sec

xvii) Ensure pantograph is raising in three steps.



5


xviii) Clean all the roof Insulators with Vim powder & dry

cloth.

xix) In case flashing marks are noticed on the insulators,

clean and apply anti tracking varnish on the flashed

portion.

8.0 Main Air Compressor (Mac)

i) Check for any Oil or Air Leakage from Joints,

Radiator, Suction/ Delivery pipes and safety valves.

ii) Check for any hitting mark/damage to the radiator.

iii) Check for intactness of resilient mounting.

iv) Check for any abnormal sound & excess Heat during

run.

v) Check Cut in & Cut out pressure of compressor

governors.

Cut in 7.0 Kg/cm²

Cut out 8.0 Kg/cm²

9.0 Auxiliary Compressor

i) Check Oil Level and for any oil/ air leakage.

ii) Check the Tightness of Foundation Bolts and other

fittings.

iii) Ensure proper function of Aux Compressor & its

governor.

Cut in 5.3 Kg/cm²

Cut out 6.3 Kg/cm²

10.0 APC Magnet

i) Check intactness of mounting bolts.

ii) Check intactness and proper securing of cable conduit.

11.0 Final Testing (From Both D/Cabs)

i) Keep MMI in Maintenance Mode

ii) Check Healthiness of various Lamp Indication by

Pushing Test Push Button.

iii) Check on MMI that all coaches are set.

iv) Check the Healthiness of each and every function

physically which are displayed on various screens.

(Top level, Unit Level, Drive/ Brake, Energy, Fault

logged, V > 0 & V = 0) of MMI.

v) Check for any Error Message on the screen.

vi) Check ground fault in 110V DC and 110V AC circuit

by multi-meter. Record voltage between (45-55 V) +ve

to ground -ve to ground.

vii) Check CB set/ trip on MMI.

viii) Check Panto Raising/Lowering timing on MMI. 6-10 Sec

ix) Check working of Fan, Light and Ventilation (both

50% and 100%)



6


x) Check Changeover on MMI for 415V AC, 110V AC, 110V

DC by operating Basic Unit Isolating Switch.

xi) Check operation of Head Light, Auxiliary Head Light,

Flasher, Tail Light and Blinker Lights on various positions.

xii) Check operation of Signal bell and Emergency bells and

their indication.

xiii) Check working of PA/PIS & TMS system.

Intercom, Passenger address , PIS, TMS

xiv) Check for Healthiness of Head-code.

xv) Check functionality of Entering Neutral Section Push

Button by observing feedback on SKS 12 & 13.

xvi) Check operation of "Battery Supply " switch

xvii) Check working of Emergency OFF Loop push Button.

xviii) Observe all Sensors Feed Back Signals in "Observer" by

laptop speed sensors, BC pressure.

xiv) Ensure AWS working by Pressing vigilance Push button

for 8 sec.

xv) Check working of Dead man valve in normal and RDM

mode .

xvi) Measure and record the rate of air flow of ACU & TCU

blowers of all four Motor coaches ACU > 5-6m/s, TCU >

7-9 m/s

U1 U2 U3 U4

TCU ---------

ACU ---------

xvii) Check working of audio visual and cross passing.

xviii) Run down the Rake in Normal and RDM mode.

xix) Check AWS Speedometer and Speed Recorder and ensure

no differential error occurs from both cabs.

xx) Revert to "Drive Mode" on MMI after completion of

testing.



7

12.4 TRIP INSPECTION SCHEDULE (10 Days) CARRIAGE


1.0 Driving Cabs

i) Check proper working of Duplex, BC, Guard's and Parking

Brake gauges.

ii) Check for availability of Short Circuit Clips, Wooden Wedge,

Fire Extinguisher, ACP Bamboo.

2.0 Auto Drain Valve

i) Check the working of Auto Drain Valve.

ii) Check for leakage from drain valve. Replace if required.

3.0 AIR DRIER

i) Check Mounting Arrangement of Air Dryer for intactness.

ii) Check functioning of Air Drier by observing Humidity

Indicator.

iii) Check for any air leakage from Duplex piston valve.

iv) Check both the towers are purging.

4.0 Parking Brake

i) Check for proper fitment of Parking Brake Cylinder

foundation, Brake Arm, Cup Sleeve, wire rope, release handle

etc.

5.0 Schaku Coupler

i) Ensure the intactness of Cup-Sleeve Bolt.

ii) Check the condition of Articulation Bearing Bolt and Bush.

iii) Check for any air leakage from MR & BP Pipe bracket and

bushing.

iv) Check the condition of centering device & lift spring.

v) Check greasing of articulation bearing bolt and condition of

bush.

6.0 Air Suspension

i) Check foundation Allen Bolts intactness.

ii) Check for any crack, dent Marks, leakages, and hitting marks

on air Spring Bellow.

iii)

Check the Leveling Valve Assembly for any leakage or

damage.

Check leveling valve safety plate.

iv) Ensure Air Spring iso. Cocks are in open position.

v) Check all the Pipes, Couplings for any leakage and attend it.

vi) Check for any rubbing/damage to Flexible Pipes and attend.



8


7.0 Piping And Reservoirs

i) Check for any air leakage, ensure availability of all clamps.

ii) Check Welding Joints, Split Pins, and Fixing Bolts of all the

air reservoirs.

iii) Ensure that the Reservoirs are intact with MS straps.

iv) Check for isolation of EP/AUTO/Bogie & coupling cocks

v) Check for any Damage to Piping and Cocks. Replace

defective / leaking cocks.

8.0 BOGIE

i) Check Bogie frame, Bolster and coach under-frame for any

crack / damage.

ii) Check coach sole-bar and under frame for any crack/ hitting

marks.

iii) Check condition of liner between Bogie & Bolster.

iv) Check for healthiness and foundation intactness of lateral and

vertical friction dampers.

v) Check Palm-pull rods for any crack/ bending. Check condition

of bushes, pins and safety Chains.

vi) Check availability of pins with Bulb Cotters & Split Pins.

vii) Check Side Bearer for Crack or Oil Leakage.

ix) Check for Side Bearer cover jam/ loose.

x) Check for bolt tightness of Center Pivot or any crack.

xi) Check Axle Springs for any Breakage/ Permanent set.

xii) Check and ensure the intactness of Cattle guard, Buffer

foundation Bolts.

9.0 BRAKE CYLINDER

i) Check fixing Bolts of Brake Cylinders for any damage or

slackness.

ii) Check Brake Rigging parts i.e. pins, Nut Bolts, Cutters, Split

Pins of Brake Block key shoe head pins for missing, worn out,

slackness.

iii) Check Brake Hanger Safety Brackets and Safety Stopper

Plates are intact.

iv) Replace worn out Brake Blocks.

v) Ensure sufficient Gap between Brake Block and Wheel. >12 mm

vi) Check Brake Cylinder Piston not infringing with U Bracket

in brake applied condition.



9


10.0 Wheel And Axle Box

i) Feel temperature of Axle Box Housing for any

abnormality.

ii) Check Axle Box Covers for intactness of bolts and

availability of Split Pins.

iii) Check the Wheel for Flat, Chipping and other defects.

11.0 Furnishing Items

i) Ensure healthiness of both side curtains in both D-Cabs.

ii) Check M/man seat for smooth up/down and Forward/

Reverse movement operation.

iii) Check Grab Handles and Center Pole for proper

intactness and welding.

iv) Clean Look Out Glass and ensure clear Visibility.

v) Check operation (open/close/ locking) of D/cab doors.

vi) Check operation (open/close/ locking) of doors in

passenger area. Check for any damages to door frames.

vii) Attend broken Seats & Seat Frames and torn first class

seats.

viii) Ensure availability of safety cover of Articulation

Bearing bolt.

ix) Ensure proper cleaning of D/cab and look out glasses.

x) Ensure general cleaning of all coaches.

12. Testing (Put MMI In Maintenance Mode)

12.1 Switch On DCS Key And Observe On MMI.

i) Check application of holding brakes in all coaches.

ii) DCS key "ON" position- 0.8 Kg/cm2

iii) DCS key "OFF" position - 1.2 Kg/cm2

12.2 EP Brake Application

i) Application Timing - 4-6 sec

ii) Release Timing - 4-6 sec

12.3 Auto Brake Application

i) Application Timing 6-10 Sec

ii) Release Timing - < 20 Sec

12.4 Emergency Brake By Power Brake Controller

i) Application Timing - 4-6 sec

ii) Release Timing - to be confirmed rdso 4-6 sec



10


12.5 Emergency Brake By Brake Controller

i) Application Timing - 6-10 Sec

ii) Release Timing - < 20 Sec

12.6 Check The Following During Brake

Application And Releasing

i) Air leakage from Brake units/ Brake Cylinder /

Pipeline / Reservoir / Safety Valve. No Leakage

ii) Ensure No EP Unit is hunting.

iii) Safety valve should be blowing during Auto Brake

Application only.

iv) Check for free movement of Brake Cylinder

Piston during application & releasing.

v)

In case of Late Releasing of brake on MMI,

identify the particular coach by going to Unit and

attend.

vi) Check working of parking brake Application

/Releasing Push Button.

vii)

Ensure during parking Brake application PB

gauge showing 0.0 kg/cm2 and during releasing

5.0Kg/cm2

ix) Verify working of Parking Brake Cylinder in all

the Coaches.

x) Check working of Emergency Valve in Normal

and RDM from both the Cabs.

xi) Check working of Guard Emergency Handle from

both cabs.

xii)

Check working of hooter from both cabs (M/Man

and GD side) and ensure no leakage from Horn Foot valve.

xiii) Check BP, Charging Time from Both the D/cabs. 90-120 sec

ix) Measure brake pipe pressure on Duplex gauge.

ICS ON Cab-1

ICS ON Cab-2

BP Cab-1_____

BP Cab-2_____

BP Cab-1_____

BP Cab-2_____



11

12.5 MAINTENANCE SCHEDULE OF AC-DC (Siemens) IA (45Days) ELECTRICAL

Sr. Description Remark

1.0 Pre-Testing

1.1 Keep MMI in Maintenance Mode.

1.2 Check on MMI that all coaches are set.

1.3

Check the Healthiness of each and every function

physically which are displayed on various screens (Top

level, Unit Level, Drive/Brake, Energy, Fault logged, V >

0 & V = 0) of MMI.

1.4 Check for any Error Message on the screen.

1.5

Check ground fault in 110V DC circuit by multi-meter.

Record voltage between (45 - 55 V) '+ve to ground, -ve to

ground.

1.6 Check ground fault in 110V AC circuit by multi-meter.

Record voltage between ( 45 - 55 V).

1.7 Check and ensure all MCB are set on E-Cabinet.

1.8 Check and ensure all rotary switches are set in their

relevant normal position in E-Cabinet.

1.9 Check CB set/trip on MMI.

1.10 Check Changeover on MMI for 415V AC, 110V AC, 110V


1.11 Check functionality of Entering Neutral Section Push

Button by observing feed-back on SKS 12 & 13.

1.12 Check operation of "BA Reset" switch

1.13 Check working of Emergency OFF Loop push Button.

1.14 Observe BECU Speed Sensors Feed Back Signals in

"Observer" by laptop.

1.15 Check working of Dead man’s valve in normal and RDM

mode .

1.16 Ensure the functions of E-Cabinet switches.

1.17 Measure the rate of air flow of ACU of all four Motor

coaches after filter cleaning.

> 5-6 m/s

1.18 Measure the rate of air flow of TCU blowers of all four

Motor coaches after air blowing.

> 8-9m/s

1.19 Check working of audio visual.

1.20 Down load the events of all Four TCU & both CCU and

analyze for any fault message.

1.21 Take energy consumed readings and reset the both counters.

1.22 Take energy re-generated readings and reset the both

counters.

1.23 Take distance (km) readings and reset the both counters.

1.24 Ensure correct position of check nut in Escorts make ICS.

1.25 Note the brake cylinder pressures in each coach with

SIBAS monitor both normal redundant modes of BCU.



12


2.0 Master Controller

2.1 Check the operation of Dead-man, Forward/ Reverse, DCS

Key, Traction, brake and coast position.

2.2 Visually check Encoder cable for any insulation damage.

2.3 Check all electrical & micro switches connections for

intactness.

2.4 Visually check the operation of all micro switches

2.5 Ensure no excessive play in T-handle.

3.0 Push buttons & Switches.

3.1 Check & ensure smooth operation with their indications of all

push buttons on Driver desk.

3.2 Check Healthiness of various Lamp Indications by Pushing

Test Push Button.

3.3 Check the operation of all the switches.

4.0 End wall

4.1 Check intactness of wiring connection at MCB, Relays,

Contactors etc. of all D cabs.

5.0 Transformer

5.1 Check colour of silica gel. It should ORANGE. Heat/replace

the silica gel if found grey.

5.2 Check for any oil leakage.

5.3 Check working of radiator blower fans & oil pump.

5.4 Check for any hitting mark or damage.

5.5 Transformer cleaning to be done.

5.6 Oil level to be checked. It should be in-between low level and

300

mark.

5.7 Ensure Earthing connection intactness.

5.8 Check the foundation bolts intactness.

5.9 Ensure Radiator fins cleanliness.

6.0 Traction Motor

6.1 Record the temperature at DE and NDE side of traction motor

bearings by temperature gun.

While rake

placed in

shed

6.2 Visual inspection for any external hitting or damage.

6.3 Check intactness of TM mounting bolts & MSU half shell

bolts.

6.4 Check tightness of Gear case bolts.

6.5 Check the oil level and colour of gear case oil.

6.6 Check intactness of body earthing.

6.7 Check for rubbing and damage of Traction Motor cables and

their proper securing.

6.8 Visual inspection for damage to sandwich packing.

6.9 Clean suction air filters by dry compressed air.



13


6.10 Check for proper fitment and tightness of bellow.

6.11 Check for any damage. Replace if required.

7.0 Motor Suspension Unit (MSU)

7.1 Check for any sign of over-heating of bearings.

7.2 Check that the housing bolts are intact.

7.3 Check for any abnormality.

8.0 Main Compressor

8.1 Clean externally compressor body & radiator.

8.2 Check operation of compressor by way of observing running

sound, feel temperature by hand.

8.3 Check for any oil or air leakage from joints, suction or

delivery pipes.

8.4 Ensure oil level.

8.5 Check condition of resilient mounting for intactness.

8.6 Check & ensure tightness of foundation bolts.

8.7

Check vacuum indicator on silencer (suction filter)

i) Colourless - ok

ii) Red Colour - Suction filter defective

8.8 Ensure proper tightness of delivery pipe.

8.9 Ensure the healthiness of mounting wire ropes.

8.10 Clean air suction filters by dry compressed air.

8.11 Check pressure built up time of each Unit ( 0- 7 kg/cm2) 10-12 min

8.12 Check Cut in & Cut Out Setting of Main air Compressor Cut in 6.0 kg/cm²

Cut out-7.0 kg/cm²


9.1 Check the carbon brush, if required to be replaced.

9.2 Check oil level. Top up if required.

9.3 Check for any leakage of oil and air.

9.4 Drain auxiliary Compressor air reservoir.

9.5 Check the foundation bolts.

9.6 Check & Record time to build up pressure 0 to 5.0 kg/cm² within 4 min

9.7 Check Cut in & Cut Out Setting of Auxiliary Compressor. Cut in 5.3 kg/cm²

Cut out-6.3 kg/cm²

9.8 Check battery voltage with auxiliary compressor ON.

10.0 TCC & ACU

10.1 Clean the air intake jally of TCC / Module heat sink.

10.2 Check working of TCC blowers.

10.3 Intactness of grounding shunts.

10.4 Check the intactness of VSS cable connections.

10.5 Cleaning of TCC, ACU cabinet.



14


11.0 L.A, C.T. & P.T.

11.1 Clean the insulators.

11.2 Check the HT Connection intactness.

11.3 Check the intactness of foundation bolts.

11.4 Check for any crack on the insulators.

12.0 Pantograph & Roof Equipment

12.1

Check for any sign of external hitting / damages /

cracks on Panto Pan, Rocker Assembly, Lower Frame

,Upper Frame, Base Frame, Coupling Rod, Parallel

Guide Bar (Schunk) Raising Springs, Tension bolts,

Anti-balancing rod, upper articulation, Lower

articulation, Eye-let Rod and Other Sub Assemblies of pantograph. In case of any abnormality replace it (SIL).

12.2 Check for any OHE rubbing marks on panto pan below

Red paint line.

12.3 Check thickness of Wearing Strips. It should be above

condemning size.

> 3 mm

12.4

Check that wearing Strips are without Sharp Edges and

ensure Screws are not projecting above the wearing

strips and are properly secured.

12.5 Check that there is no Gap between the Main wearing

and End wearing Strips.

12.6 Ensure availability of all Bolts, Nuts, Lock-Nuts,

Spring Washers, Split pins etc. of various fittings .

12.7 Check Lower Frame Assembly & Upper Frame

Assembly for excessive lateral play (transverse).

12.8

Check Bow Plunger is sliding freely while pressing and

split pins are available (SIL).

Check Rocker assembly for free movement (Schunk).

12.9

Check the Control Box, Rubber Bellow & Rubber/PU

Pipe for

any air leakage.(Schunk)

Check the Servo motor, Throttle Valve, Magnet Valve

for Any air leakage.(SIL)

12.10 Check Horizontal Damper for Oil Leakage and smooth

operation (Schunk).

12.11 Check for free movement of servo motor piston rod and

eyelet rod. (SIL)

12.12 Ensure availability of all flexible shunts and check that


12.13 Ensure provision of steel bracket on lower articulation to

prevent earthing of anti balancing tube after uncoupling.



15


12.14

Check whether rubber stopper on the base frame and MS

bracket on lower articulation is provided to prevent over

turning of panto in unwired section. (SIL)

12.15 Check & record Raising and Lowering time of Pantograph. 6-10 Sec

12.16 Ensure pantograph is raising in three steps in SIL.

12.17 Clean all the Insulators with vim powder & dry cloth.

12.18 Air blow the DBR.

12.19 Visual check for any damage to grid, flashover.

12.20 Check for HT connection intactness.

12.21 Check and ensure that there is no Air Leakage from the Panto

magnet valve.

12.22 Check panto pan tension. 10.5 kg (Shunk)

9.5 kg ( SIL)

13.0 VCB (Single bottle)

13.1 Check foundation bolts tightness.

13.2 Check the tightness Electrical connections.

13.3 Check for cracks and flash marks.


13.5 Check for connection of AC earthing switch.

13.6 Clean and grease the AC earthing switch.

13.7 Check for any air leakage in VCB pneumatic connection.

14.0 DC Earthing switch

14.1 Clean & Grease the moving and fixed contact of earthing switch.

14.2 Ensure Connection tightness.

15.0 Change over switch



15.3 Clean insulator using Vim powder.

15.4 Check visually for any crack/damage.

15.5 Check tightness of all cable connections.


16.1 Check all MCBs & Switches for normal position on the E-

Cabinet in the Motor Coach.

16.2 Check for set condition of Motor Protection Switch (MPS) in

all the end panels.



16


16.3 Ensure proper locking of panel doors of E-Cabinet in D/cab &

MC, End wall panels other coaches.

16.4 Ensure proper position of MVB segment address selector

switch.

17.0 AWS

17.1 Note the defects reported in defect card book.

17.2 Check and note the reading of SFBC, EBC, ISU

17.3

Ensure the intactness of ISU, BAU, Indication panel, PCB card

frame, Elmex terminal, magnet valve, SPM hooter & tightness

of wire connections

17.4 Check the ISU handle for proper fitment & tightened if found

loose.

17.5 Ensure functioning of SPM hooter and BAU.

17.6 Check AWS MCB and ground fault.

17.7 Set wheel diameter in B4A1 card.

17.8 Function test pressure test, SPM test & simulation test to be

done.

17.9 Replace speed cut off and exhaust magnet valve. 9 monthly basis

17.10

Check & note the Engine magnet pulses on B1A1 card by

multimeter

50 Khz-socket 1 & 3 200 +/_ 20 mv

100 Khz – soket 5 & 7 350 +/ - 25mv

17.11

Check voltage on B14A1 card

Socket 1-2 12v +/- 0.3 v, 0.6v

Socket 3-2 24v +/- 1.1v, 0.6v

Socket 4-5 5v +/- 0.3v

17.12 Download medha/ AAL SPM data

17.13

Ensure intactness of Engine magnet foundation beam, engine

magnet, JB-1, JB-II, TGs, magnet valve & cover, pipes &

clamping, all fastners, washer, split spins, safety chains etc.

17.14 Check the clearance of engine magnet clearance from the rail.

17.15 Ensure TG axle attachment, dowel pins fork.

17.16

Ensure the SPM is showing speed by manually rotating TG in

both directions. Ensure no brake is applied in forward

direction and brake applied in reverse direction.

18.0 APC

18.1 Ensure proper intactness of foundation hardware of APC

magnet.



17

Sr. Description Remarks

18.2 Check for intactness of electrical coupler.

18.3

Ensure functioning of APC receiver by passing over APC

track magnet and ensure same at SIBAS clip also. Ensure reset

of APC also.

19.0 Fire Extinguisher

19.1 Check for seal is intactness.

19.2 Check for refilling date & Replace if expired.

19.3 Check for fire extinguisher mounting.

19.4 Check the condition of nozzle/ pipe & replace if punctured.

20.0 PIS/PA System & TMS

20.1 Check working of intercom.

20.2 Check working of public address from both cab.

20.3 Check working of PIS from both cabs by entering any journey.

20.4 Ensure availability of manual head code.

20.5 Check working of coach display and speakers.

21.0 Light & Fan

21.1 Check operation of Lights, Fans and Ventilation switches on

50% &100% position.

21.2 Check the working of all Fans and Lights in the coaches.

Attend the defects if noticed.

21.3 Check working of Signal Bell / Emergency Bell & indication

LEDs.

21.4 Check working of Flasher, Tail & Blinker Light and ensure

smooth operation of their Push Buttons.

21.5 Check working of Head Light & Auxiliary Head Lights at both

Dim/ Bright positions.

21.6 Check working of DC-DC Converter for Head light on both

normal and standby positions.

21.7 Check head light focus and adjust if required.

21.8 Check working of Cab Light, Emergency Cab Light, Spot

Light & Cab Fans.

21.9 Ensure smooth operation of all push button & switches in the

D/ Cab.

22.0 BATTERY

22.1

Check & record Battery Voltage by operating "TEST

BATTERY VOLTAGE" push button in motor coach shunting cab after switching off battery.

22.2 Check for intactness of Battery Box mounting Bracket and

Bolts.



18

Sr. Description Remarks

22.3 Check the battery voltage when MC charged & record it.

22.4 Check the condition of battery cover, battery box for proper

fitment.

22.5 Check the condition of battery connecting leads.

22.6 Ensure intactness of lead connections.

22.7 Check the level of electrolyte in each cell &Top up if less.

22.8 Check the voltage of each cell.

22.9 Check the specific gravity of each cell.

22.10 Apply petroleum jelly on all connections after cleaning.

22.11 Clean the battery box & trolley.

22.12 Ensure proper working of trolley & door hinges.

22.13 Ensure compact placement of battery cells to avoid relative

movement during run.

23.0 Final Testing from both Driving CABs

23.1 Keep MMI in Maintenance Mode

23.2 Check Healthiness of various Lamp Indication by Pushing

Test Push Button .


23.4

Check the Healthiness of each and every function physically

which are displayed on various screens.

(Top level, Unit Level, Drive/Brake, Energy, Fault logged, V

> 0 & V = 0) of MMI.


23.6

Check ground fault in 110V DC and 110V AC circuit by

multi-meter. Record voltage between (45 - 55 V) + ve to

ground and -ve to ground.


23.8 Check Panto Raising/Lowering timing on MMI. 6-10 Sec

23.9 Check working of Fan, Light and Ventilation (both 50% and

100%).

23.10 Check Changeover on MMI for 415V AC, 110V AC, 110V


23.11 Check operation of Head Light, Auxiliary Head Light,

Flasher, Tail Light and Blinker Light.

23.12 Check operation of Signal bell and Emergency bells and their

indication.

23.13 Check working of PA/PIS & TMS system.

23.14 Check for Healthiness of Head-code.



19

Sr. Description

23.15 Check functionality of Entering Neutral Section Push Button

by observing feed-back on SKS 12 & 13.

23.16 Check operation of "Battery Supply " switch.


23.18 Ensure AWS working by Pressing vigilance Push button for 8

sec.

23.19 Check working of Dead man’s valve in normal and RDM

mode .

23.20 Measure and record the rate of air flow of ACU & TCU

blowers of all four Motor coaches.

ACU>5-6m/s

TCU>7-9 m/s

23.21 Check working of audio visual and cross passing.

23.22 Run down the Rake in Normal and RDM mode from both

cabs.

23.23 Check AWS Speedometer and Speed Recorder and ensure no

differential error in both cabs.

23.24 Revert MMI to "Drive Mode" after completion of testing.



20

12.6 MAINTENANCE SCHEDULE OF AC-DC (Siemens) IA (45 Days) CARRIAGE


1.0 Driving CAB

a. Check while the rake is rolling:

1. Check skidding of wheels.

2. Check unusual noise from under-gear.

b. On Stationary mode:

1. Check logbook and enter remarks regarding attention against

any adverse remarks given logbook.

2. Check the function on MMI for all coaches.

3. Check brake continuity test.

4. Check Signal bell – I continuity.

5. Check Signal bell – II continuity

6. Check working of intercom and PA system.

7. Check working of AWS.

1.1 Check proper working of Duplex, BC, Guard's and Parking Brake

gauges.

1.2 Check and ensure for Wooden Wedges provided in each driver cab. 4 nos.

1.3 Check and ensure for Fire Extinguishers provided in each driver

cab. Ensure expiry date.

2 nos.

1.4 Ensure cleaning of look out glasses (M/Man side & Guard side).

1.5 Ensure cleaning of D/cab & Driver Desk.

1.6 Check for smooth operation of guard emergency handle and proper

ON/OFF stenciling.

1.7 Check for any air leakage from pipe & couplings of Guard

emergency handle.

2.0 ACP

2.1 Check working of ACP by pulling handle from each coach (east &

west side) and ensure flag is coming out sufficiently and getting re-

set.

2.2 Ensure that coach in which ACP operated is correctly displayed on

the MMI.

3.0 Air Spring Suspension

3.1 Check the foundation allen bolts intactness.

3.2 Check air spring for any crack, dent marks, leakage and hitting

marks on air spring.

3.3 Check the foundation and fitment of vertical dampers & Replace if

not working.

3.4 Check the Leveling Valve assembly for any leakage & Replace if

required.

3.5 Check the Installation lever and adjust the clearances if found

abnormal.



21


3.6 Check the working of all cocks provided for air spring &

Replace if required.

3.7 Ensure that Leveling Valve installation Rod is in vertical

position.

3.8 Ensure proper position of all air springs cocks.

3.9 Drain Air Spring Reservoir and ensure availability of baffle

plates to protect drain cock.

3.10 Check all the Pipes & Couplings for any air leakage and

attend it.

3.11 Check for any rubbing / air leakage/ damage to the air

spring flexible hoses and replace if required.

3.12 Ensure availability & intactness of bolster liner locking

plate.

3.13 Check the welded joints of Air spring base frame for any

cracks/ breakages.

3.14 Check the intactness of foundation bolts of 20 liters tank

and healthiness of release valve.

3.15 Check the function of duplex check valve as per work

instruction.

3.16 Ensure the foundation bolt intactness of leveling valve

protection plate.

4.0 Air Drier

4.1 Check for intactness of mounting hardware.

4.2 Check for any air leakage from Duplex piston valve.

4.3 Purging of air dryer with interval of 120 secs for Knorr

Bremse make and 60 sec. for SIL make.

4.4 Check for alternate operation of regenerative towers.

4.5 Check the healthiness of desiccant by observing colour of

humidity indicator.

Blue = OK, Yellow = warning

4.6 Check and observe the water content in MR by dew point

meter.

4.7 Visual inspection for external damages to air dryer and its

pipe lines.

4.8 Check the tightness of Electrical supply connector.

5.0 Parking Brake

5.1

Check for proper fitment of Parking Brake Cylinder

foundation, Brake Arm, Cup Sleeve, Release handle wire rope etc.



22


5.2 Check the Parking Brake Cylinders operation, (wheel No. 1-

3, 5-7 in DTC and middle NDTC) and ensure physically

application and release of the brakes.

5.3 Check the working of Double Check Magnet valve. Replace

if found leakage / not working.

5.4 Ensure the intactness of Double Check Magnet valve

foundation allen bolts.

5.5 Ensure releasing of brakes with rope handle.

6.0 Buffers & Schaku Coupler

6.1 Ensure the intactness of Cup-Sleeve Bolt.

6.2 Check the condition of Articulation Bearing Bolts and Bush.

6.3 Check for any air leakage from MR & BP Pipe bracket and

bushing/ elbow clamps.

6.4 Check the condition of centering device & leaf spring.

6.5 Check the tightness of check nut and wing nut.

7.0 Piping & Reservoirs

7.1 Check for any air leakage/rubbing & ensure availability of

clamps.

7.2 Check welding joints, split pins, fixing bolts of all the

reservoirs.

7.3 Check for any isolation of EP/ AUTO/ Bogie & coupling

cocks and attend if isolated.

7.4 Ensure smooth operation of EP, Auto & Bogie cocks.

7.5 Check for any Damage to Piping and Cocks & Replace

defective/ leaking cocks.

7.6 Check intactness of foundation Bolts of MR, Auxiliary and

Air Spring Reservoirs & Ensure availability of split pins.

7.7 Check the intactness of Reservoirs of MS straps.

7.8 Drain all the Reservoirs with drain cocks.

7.9 Check the operation of MR, BP , Bogie isolating and drain

cocks & Replace if any leakage.

7.10 Check for leakages flexible hoses.

7.11 Check condition of leading coach hose pipes.

7.12 Observe any sign of air leakage and looseness of end fittings.

7.13 Check rubbing of hose pipes and shifting of end nipples.

7.14 Check MR/BP cocks leakage by closing cocks.



23


8.0 Bogie

8.1 Check Bogie frame, Bolster and coach under frame for any

crack / damages or excessive wear.

8.2 Check coach sole bar and under frame for any crack / hitting

marks.

8.3 Check condition of liner between Bogie & Bolster.

8.4 Check for healthiness and foundation intactness of lateral and

vertical friction dampers. Check for signs of oil leakages.

8.5 Check Palm-pull rods for any crack/ bend.

8.6 Check condition of bushes, pins and safety Chains.

8.7 Check availability of pins with Bulb Cotters & Split Pins.

8.8 Check Side Bearer for Crack or Oil Leakage.

8.9 Check for Side Bearer cover jam/ loose.

8.10 Check for intactness of Center Pivot or any crack.

8.11 Check Axle Springs for any Breakage/ Permanent set.

8.12 Check and ensure the intactness of Cattle guard, Buffer

foundation Bolts.

8.13

Check for hitting/rubbing between bolster and bogie in lateral

direction. Check for condition of liner plate and proper

clearance.

< 3mm

8.14 Check brake shoe hanger assembly for any excessive play,

crack & damages.

8.15 Check intactness of rubber snubbers and crown packing on axle

box.

8.16 Check for any damage or abnormality on brake yoke assembly.

8.17 Check the condition of safety brackets and intactness of fixing

bolt.

8.18 Check height of cattle guard from rail level. 150 to 200 mm

9.0 Brake Cylinder

9.1 Check fixing Bolts of Brake Cylinders for any damage or

slackness.

9.2 Check Brake Rigging parts i.e. pins, Nut Bolts, Cutters, Split

Pins, Brake Block key, Brake shoe head pins for missing, worn

out, slackness.

9.3 Check Brake Hanger Safety Brackets and Safety Stopper Plates

are intact.



24


9.4 Replace worn out Brake Blocks.

9.5 Check Brake Cylinder Piston not infringing with U Bracket

in brake applied condition.

10.0 Brake Block

10.1 Adjust gap between brake blocks and wheel in released

condition.

12 mm to 15

mm

10.2 Ensure tightness of brake shoe key.

11.0 Brake Rigging

11.1 Check Nuts, Bolts, Pins, Cotters, Bush, and Washers for

intactness and wear, replace if required.

11.2 Ensure availability of Stopper Plates.

11.3 Check Brake Hangers, Brake Beams and other Brake

Rigging components for intactness and wear.

11.4 Lubricate all the moving parts by applying oil/ grease.

12.0 Dashpot

12.1 Check the oil level, top up if required. Record the quantity of

oil topped up in Dash pot.

M/C 97 mm

12.2 Check for any breakage of dashpot spring and dashpot

protective tube.

12.3 Check D/Pot bottom rubber packing for torn & damage.

12.4 Check intactness of dashpot safety loop brackets.

12.5 Ensure intactness of oil filling nipples / cap.

13.0 Wheel &Axle Box

13.1 Check for tilting of Axle Box.

13.2 Check Wheel with tapping hammer for any dull sound,

intactness of keys and glut ring, crack, flow of metal at

surface.

On tyred wheels

13.3 Check Axle Box cover for any cracks and grease leakage.

13.4 Check Axle Box Covers for intactness of bolts and

availability of Split Pins.

13.5 Check the Wheel for Flat, Chipping and other defects.

13.6 Take Wheel profile and check for wheel defect such as shell

tread, Grooved / Flat tyre, Sharp flanges, Deep Flanges, Thin Flanges, Root Wear & other defects.

13.7 Visually check for any abnormality like disc shifting Axles,

MSUs etc.

13.8 Check the temperature of Axle boxes with the help of

temperature gun.

While rake

placed in shed



25


14.0 Furnishing Items

14.1 Ensure healthiness of both side curtains and V-Cool films in

both D-Cabs.

14.2 Check M/man seat for smooth up/down and

Forward/Reverse movement operation.

14.3 Check Grab Handles and Center Pole for proper intactness

and welding & Provide missing grab handles.

14.4 Check operation (open/ close/ locking) of D/cab doors and

windows.

14.5 Check operation (open/close/locking) of doors in passenger

area / check for any damages.

14.6 Check the seats for any damage and foundation bolt

intactness. Attend broken Seats & Seat Frames and torn first

class seats.

14.7 Ensure availability of safety covers of Articulation Bearing

bolt.

14.8 Check in Handicap compartment for passenger amenities.

14.9 Clean the drain holes on the flooring in passenger area.

14.10 Check the interior & exterior stenciling of coach.

14.11 Ensure intactness of Door way side partition foundations.

14.12 Ensure intactness Coach body end panel partition.

14.13 Ensure intactness Partition SS sheet welding and molding

screw.

14.14 Ensure intactness of the hatch door bracket welding from

inside.

14.15 Ensure intactness of hatch door nut and bolt from inside.

14.16 Ensure intactness of hatch door screw from outside.

14.17 Ensure intactness of hatch door fixing chain and clamp

inside the HT compartment.

15.0 Testing

15.1 Put MMI in maintenance mode & Switch on DCS and

observe on MMI.

i) Application of holding brakes in all coaches.

ii) DCS key “ON” position. 0.8 Kg/cm2

iii) DCS key “OFF” position 1.2 Kg/cm2


i) Application Timing 4-6 sec

ii) Release Timing 4-6 sec






26


15.4 Emergency brake with Power Brake Controller



15.5 Emergency brake with Pneumatic Brake Controller



iii) Check EP application and releasing time.

iv) Check Auto application and releasing time.

15.6 Check working of Brake Controller at all positions & Ensure

No leakage from Brake Controller in release/ auto lap position.

15.7 Ensure No air leakage from EP unit in both released and

applied condition.

15.8 Ensure no EP Unit should be Hunting.

15.9 Ensure the provision of safety valve in all brake units.

15.10 Ensure the functioning of Brake Unit Safety Valve by

applying Auto Brake.

15.11 Ensure functioning of Emergency Valve in normal and

RDM.

15.12 Ensure functioning of Guards Emergency Brake.

15.13 Check all Brake Cylinders for Leakage.

16.0 Pneumatic Testing

16.1 Check BP pressure charging time from both cabs 0 to 4.7

kg/cm2.

2.5 to 3 minutes

for 12 car rake

16.2 Measure brake pipe pressure on Duplex gauge:

i) Pre-Testing Final Testing ICS ON Cab-1

BP Cab-1_______ BP Cab-1_______

BP Cab-2 _______ BP Cab-2_______

* Pressure difference in both Cab's RDK should be

> 0.1kg/cm2

ii)

Pre-Testing Final Testing ICS ON Cab-2

BP Cab-1_______ BP Cab-1_______

BP Cab-2 _______ BP Cab-2_______

16.3 Check 1 kg/cm2 MR pressure dropping time.

16.4 Check 1 kg/cm2 BP pressure dropping time.

16.6 Ensure MR and BP pipe pressure continuity.



27


16.7 Ensure proper working of Duplex Pressure Gauge, BC

Gauge, Parking Brake and Guard's Gauge.

16.8 Ensure physically application & release of Parking Brake.

16.9 Ensure Parking Brake gauge shows 0.0 kg/cm

2 pressure in

applied condition and 5 kg/cm2 in released condition.

16.10 Ensure the working of Parking Brake Push button.

16.11 Ensure smooth operation of Horn Foot Valve.

16.12 Ensure quality sound of horns.

16.13 Ensure correct position of check nut in Escort make ICS.



28

12.7 MAINTENANCE SCHEDULE OF AC-DC (Siemens) IC (180Days) ELECTRICAL


1.0 Pre-Testing

1.1 Keep MMI in Maintenance Mode.


1.3


which are displayed on various screens (Top level, Unit Level,

Drive/Brake, Energy, Fault logged,

V > 0 & V = 0) of MMI.


1.5 Check ground fault in 110V DC circuit by multimeter. Record

voltage between ( 45 - 55 V) '+ ve to ground, -ve to ground.

1.6 Check ground fault in 110V AC circuit by multimeter. Record

voltage between ( 45 - 55 V).

1.7 Check and ensure all MCB are set on E-Cabinet.

1.8 Check and ensure all rotary switches are set in their relevant

normal position E-Cabinet


1.10 Check Changeover on MMI for 415V AC, 110V AC, 110V DC

by operating Basic Unit Isolating Switch.

1.11 Check functionality of Entering Neutral Section and cruise

control Push Button by observing feedback on SKS 12 & 13.

1.12 Check operation of "BA Reset" switch.


1.14 Observe BECU Speed Sensors Feed Back Signals in "Observer"

by laptop.

1.15 Check working of Dead man valve in normal and RDM mode.

1.16 Ensure the functions of E-Cabinet switches.

1.17 Check the Healthiness of MVB Line with MVB bus tester as per

existing TC.

1.18 Measure the rate of air flow of ACU of all four Motor coaches

after fitter cleaning.

> 5-6 m/s

1.19 Measure the rate of air flow of TCU blowers of all four Motor

coaches after air blowing.

> 8-9 m/s

1.20 Check working of audio visual.

1.21 Down load the events of all Four TCU & both CCU and analyze

for any fault message.

1.22 Take energy consumed readings and reset the both counters.

1.23 Take energy re-generated readings and reset the both counters.

1.24 Take distance (km) readings and reset the both counters.

1.25 Note the brake cylinder pressures in each coach with SIBAS

monitor both normal and redundant modes of BCU.



29


2.0 Master Controller

2.1 Check the operation of Dead-man, Forward/ Reverse, DCS Key,

Traction, brake and coast position.

2.2 Visually check Encoder cable for any insulation damage.

2.3 Check all electrical & micro switches connections for

intactness.

2.4 Visually check the operation of all micro switches.

2.5 Ensure no excessive play in T-handle

3.0 Push buttons & Switches

3.1 Check & ensure smooth operation with their indications of all

push buttons on Driver desk

3.2 Check Healthiness of various Lamp Indication by Pushing Test

Push Button.

3.3 Check the operation of all the switches.

4.0 End wall

4.1 Check intactness of wiring connection at MCB, Relays,

Contactors & etc. of all coaches.

4.2 Check the LV connections for tightness in train-line junction

box.

4.3 Clean the end wall panels.

5.0 Transformer

5.1 Check colour of silica gel. It should BLUE/ ORANGE. Heat the

silica gel if found grey.

5.2 Check for any oil leakage.

5.3 Check working of radiator blower fans & oil pump.

5.4 Check for any hitting mark or damage.

5.5 Transformer cleaning to be done.

5.6 Oil level to be checked. It should be in between the low level

and 300

mark.

5.7 Ensure Earthing connection intactness.

5.8 Check the foundation bolts intactness.

5.9 Ensure Radiator fins cleanliness.

5.10 Check the BDV & DGA of Transformer oil & filter if BDV

low.

6.0 Traction Motor

6.1 Record the temperature at DE side of bearing. While rake

placed in shed 6.2 Record the temperature at NDE side of bearing.

6.3 Visual inspection for any external hitting or damages.

6.4 Check intactness of TM mounting bolts & MSU half shell bolts.

6.5 Check tightness of gear case bolts.



30

Sr. Description

6.6 Check the oil level and colour of gear case oil.

6.7 Check intactness of body earthing.

6.8 Check for rubbing and damage of Traction Motor cables and their proper securing.

6.9 Visual inspection for damage to sandwich packing.

6.10 Clean suction air filters by dry compressed air.

6.11 Check for proper fitment and tightness of bellow.

6.12 Check the size of ERB and replace if under size.

6.13 Check the healthiness spring tension of ERB and replace if

defective.

6.14 Check and ensure intactness of gaskets & fiber bush of ERB.

6.15 NDE bearing greasing. During IInd IC

6.16 Check for any damage. Replace if required.

6.17 Cleaning of Traction motor filter.

7.0 Suspension Tube Assembly

7.1 Check for any sign of over-heating of bearings.

7.2 Check that the housing bolts are intact.

7.3 Check for any abnormality.

7.4 Both end MSU bearing greasing to be done. During IInd IC

8.0 Main Compressor

8.1 Clean externally compressor body & radiator.

8.2 Check operation of compressor by way of observing running sound, feel temperature by hand.

8.3 Check for any oil or air leakage from joints, suction or delivery

pipes.

8.4 Check condition of resilient mounting for intactness.

8.5 Check & ensure tightness of foundation bolts.

8.6 Check vacuum indicator on silencer (suction filter)

i) Colourless–ok ii) Red Colour – Suction filter defective

8.7 Ensure proper tightness of delivery pipe.

8.8 Ensure the healthiness of mounting wire ropes.

8.9 Clean air suction filters by dry compressed air.

8.10 Check pressure built up time of each Unit (0- 7 kg/cm2). 10-12 min

8.11 Check Cut in & Cut Out Setting of Main air Compressor. Cut in- 6.0 kg/cm²

Cut out -7.0 kg/cm²

8.12 Check oil level. 100% replacement in IInd IC.



31



9.1 Check the carbon brush, if required to be replaced.

9.2 Check oil level, Top up if required.

9.3 Check for any leakage of oil and air.

9.4 Drain auxiliary Compressor air reservoir.


9.6 Check & Record time to build up pressure up to 6.5 kg/cm².

9.7 Check Cut in & Cut Out Setting of Auxiliary Compressor Cut in- 5.3 kg/cm² Cut out- 6.3 kg/cm²

9.8 Ensure oil level and top up if required.

10.0 TCC & ACU & CCU

10.1 Clean the air intake jally of TCC / Module heat sink.

10.2 Check working of TCC blowers.

10.3 Check intactness of grounding shunts.

10.4 Check the intactness of VSS cable connections.

10.5 Cleaning of CCU.

10.6 Cleaning of TCC, ACU cabinet.

10.7 Check the contactors K1, K4, K5, K6, and clean the arc chutes if

required, and check interlocks.

11.0 L.A., C.T. & P.T.



11.3 Check the intactness of foundation bolts.

11.4 Check for any crack on the insulators.

12.0 Pantograph & Roof Equipment Remark

12.1 Check for any sign of external hitting / damages / cracks on

Panto Pan, Rocker Assembly, Lower Frame ,Upper Frame, Base

Frame, Coupling Rod, Parallel Guide Bar (Schunk), Raising

Springs, Tension bolts, Anti-balancing rod, upper articulation,

Lower articulation, Eye-let Rod and Other Sub Assemblies of

pantograph (SIL). In case of any abnormality replace it.

12.2 Check for any OHE rubbing marks on panto pan below Red paint

line.

12.3 Check thickness of Wearing Strips. It should be above

condemning size. >3 mm

12.4

Check that wearing Strips are without Sharp Edges and ensure

Screws are not projecting above the wearing strips and are

properly secured.

12.5 Check that there is no Gap between the Main wearing and End

wearing Strips.

12.6 Ensure availability of all Bolts, Nuts, Lock-Nuts, Spring

Washers, Split pins etc. of various fittings.



32


12.7 Check Lower Frame Assembly & Upper Frame Assembly for

excessive lateral play (transverse).

12.8

Check Bow Plunger is sliding freely while pressing and split pins are

available(SIL).

Check Rocker assembly for free movement (Schunk).

12.9

Check the Control Box, Rubber Bellow & Rubber/PU Pipe for any

air leakage. (Schunk).

Check the Servo motor, Throttle Valve, Magnet Valve for Any air

leakage. (SIL)

12.10 Check Horizontal Damper for Oil Leakage and smooth operation

(Schunk).

12.11 Check for free movement of servo motor piston rod and eyelet rod.

(SIL)

12.12 Ensure availability of all flexible shunts and check that strands are

not broken.

12.13 Ensure provision of steel bracket on lower articulation to prevent

earthing of anti balancing tube after uncoupling.

12.14

Check whether rubber stopper on the base frame and MS bracket on

lower articulation is provided to prevent over turning of panto in

unwired section (SIL).

12.15 Check & record Raising and Lowering time of Pantograph 6-10 Sec.

12.16 Ensure pantograph is raising in three steps (SIL).

12.17 Clean all the Insulators with vim powder & dry cloth.

12.18 Clean and Air blow the DBR.

12.19 Visual check for any damage to grid, flashover.

12.20 Check for HT connection intactness.

12.21 Check and ensure that there is no Air Leakage from the Panto

magnet valve.

12.22 Check panto tension. 10.5kg (Shunk)

/ 9.5 kg ( SIL)

13.0 VCB

13.1 Check foundation bolts tightness.

13.2 Check the tightness Electrical connections.

13.3 Check for cracks and flash marks.


13.5 Check for connection of AC earthing switch.

13.6 Clean and grease the AC earthing switch.

13.7 Check for any air leakage in VCB pneumatic connection.

13.8 Draining of pressure regulator and air reservoir.

14.0 DC Earthing switch

14.1 Clean & Grease the moving and fixed contact.

14.2 Ensure Connection tightness.



33


15.0 Change over switch



15.3 Clean insulator using Vim powder.

15.4 Check visually for any crack/ damages.

15.5 Check tightness of all cable connections.


16.1 Check all MCBs & Switches for normal position on the E-

Cabinet in the Motor Coach.

16.2 Check for set condition of Motor Protection Switch (MPS) in

all the end panels.

16.3 Testing & Calibration of compressor & Control pressure

governors.

16.4 Check for any damages to ceramic parts and grid of grounding

resistor.

16.5 Check the foundation for intactness.

16.6 Check the intactness of grounding shunts and provide if

missing.

16.7 Clean and air blow the grounding resistor.

16.8 Ensure proper locking of panel doors of E-Cabinet in D/cab &

MC, End wall panels other coaches.

16.9 Ensure proper position of MVB segment address selector

switch.

17.0 AWS

17.1 Note the defects reported in defect card book.

17.2 Check and note the reading of SFBC, EBC, ISU.

17.3

Ensure the intactness of ISU, BAU, Indication panel, PCB card

frame, Elmex terminal, magnet valve, SPM hooter & tightness

of wire connections.

17.4 Check the ISU handle for proper fitment & tightened if found

loose.

17.5 Ensure functioning of SPM hooter and BAU.

17.6 Check AWS MCB and ground fault.

17.7 Set wheel diameter in B4A1 card.

17.8 Function test pressure test, SPM test & simulation test to be

done.

17.9 Replace speed cut off and exhaust magnet valve. 9 monthly

17.10

Check & note the Engine magnet pulses on B1A1 card by

multimeter

50 Khz-socket 1 & 3 = 200 +/- 20 mv

100 Khz – socket 5 & 7 = 350 +/ - 25mv



34


17.11

Check voltage on B14A1 card

Socket 1-2 = 12v +/- 0.3v, 0.6v

Socket 3-2 = 24v +/- 1.1v, 0.6v

Socket 4-5 = 5v +/- 0.3v

17.12 Download Medha/ AAL SPM data

17.13

Ensure intactness of Engine magnet foundation beam, engine

magnet, JB-1, JB-II, TGs, magnet valve & cover, pipes &

clamping, all fasteners, washer, split spins, safety chains etc.

17.14 Check the clearance of engine magnet clearance from the rail.

17.15 Ensure TG axle attachment, dowel pins fork.

17.16

Ensure the SPM is showing speed by manually rotating TG in both

directions. Ensure no brake is applied in forward direction and

brake applied in reverse direction.

18.0 APC

18.1 Ensure proper intactness of foundation hardware of APC magnet

and clearance of APC receiver from rail level.

18.2 Check for intactness of electrical coupler.

18.3

Ensure functioning of ACP receiver by passing over APC track

magnet and ensure same at SIBAS clip also. Ensure reset of ACP also.

19.0 Fire Extinguisher

19.1 Check for seal intactness.

19.2 Check for refilling date & Replace if expired.

19.3 Check for fire extinguisher mounting.

19.4 Check the condition of nozzle/ pipe & replace if punctured.

20.0 PIS/PA System & TMS

20.1 Check working of intercom.

20.2 Check working of public address from both cabs.

20.3 Check working of PIS from both cabs by entering any journey.

20.4 Ensure availability of manual head code.

20.5 Check working of coach display and speakers.

21.0 Light & Fan

21.1 Check operation of Lights, Fans and Ventilation switches on 50%

&100% position.

21.2 Check the working of all Fans and Lights in the coaches. Attend the

defects if noticed.

21.3 Check working of Signal Bell / Emergency Bell & indication LEDs.



35


21.4 Check working of Flasher, Tail & Blinker Light and ensure

smooth operation of their Push Buttons.

21.5 Check working of Head Light & Auxiliary Head Lights at both

Dim/ Bright positions.

21.6 Check working of DC-DC Converter for Head light on both

normal and standby positions.

21.7 Check head light focus and adjust if required.

21.8 Check working of Cab Light, Emergency Cab Light, Spot Light

& Cab Fans.

21.9 Ensure smooth operation of all push button & switches in the

D/ Cab.

22.0 BATTERY

22.1

Check & record Battery Voltage by operating "TEST

BATTERY VOLTAGE" push button in motor coach shunting

cab after switching off battery.

22.2 Check for intactness of Battery Box mounting Bracket and

Bolts.

22.3 Check the battery voltage when MC charged & record it.

22.4 Check the condition of battery cover, battery box for proper

fitment.

22.5 Check the condition of battery connecting leads.

22.6 Ensure intactness of lead connections.

22.7 Check the level of electrolyte in each cell &Top up if less.

22.8 Check the voltage of each cell.

22.9 Check the specific gravity of each cell.

22.10 Apply petroleum jelly on all connections after cleaning.

22.11 Clean the battery box & trolley.

22.12 Ensure proper working of trolley & door hinges.

22.13 Ensure compact placement of battery cells to avoid relative

movement during run.

22.14 Clean and blowing of battery fuse box.

23.0 Final Testing from both Driving CABs

23.1 Keep MMI in Maintenance Mode

23.2 Check Healthiness of various Lamp Indication by Pushing

Test Push Button.



36

Sr. Description


23.4


which are displayed on various screens.

(Top level, Unit Level, Drive/ Brake, Energy, Fault logged, V >

0 & V = 0) of MMI.


23.6

Check ground fault in 110V DC and 110V AC circuit by

multimeter. Record voltage between (45 - 55 V), + ve to

ground, -ve to ground.

23.7 Check CB set/ trip on MMI.

23.8 Check Panto Raising/Lowering timing on MMI. 6-10 Sec

23.9 Check working of Fan, Light and Ventilation (both 50% and

100%).

23.10 Check Changeover on MMI for 415V AC, 110V AC, 110V DC

by operating Basic Unit Isolating Switch.

23.11 Check operation of Head Light, Auxiliary Head Light ,

Flasher, Tail Light and Blinker Light.

23.12 Check operation of Signal bell and Emergency bells and their

indication.

23.13 Check working of PA/ PIS.

23.14 Check for Healthiness of Head-code.

23.15 Check functionality of Entering Neutral Section Push Button

by observing feed-back on SKS 12 & 13.

23.16 Check operation of "Battery Supply" switch.


23.18 Ensure AWS working by Pressing vigilance Push button for 8

sec.

23.19 Check working of Dead man valve in normal and RDM mode.

23.20 Measure and record the rate of air flow of ACU & TCU

blowers of all four Motor coaches.

ACU >5-6 m/s

TCU >7-9 m/s

23.21 Check working of audio visual and cross passing.

23.22 Run down the Rake in Normal and RDM mode from both cabs.

23.23 Check AWS Speedometer and Speed Recorder and ensure no

differential error in both cabs.

23.24 Revert MMI to "Drive Mode" after completion of testing.



37

12.8 MAINTENANCE SCHEDULE OF AC-DC (Siemens) IC (180Days) CARRIAGE

S.N. Items to be checked Remark

1.0 Driving-CAB

1.1 Check proper working of Duplex, BC, Guard's and Parking

Brake gauges.

1.2 Check for availability of Wooden Wedges. 04 nos.

1.3 Check for availability of Fire Extinguishers. 02 nos.

1.4 Ensure cleaning of look out glasses (M/Man side & Guard side).

1.5 Ensure cleaning of D/cab & Driver Desk

1.6 Check for smooth operation of guard emergency handle and

proper ON/OFF stenciling

1.7 Check for any air leakage from pipe & couplings of Guard

emergency handle.

a. Check while the rake is rolling:

1. Check skidding of wheels.

2. Check unusual noise from under-gear.

b. On Stationary mode:

1. Check logbook and enter remarks regarding attention against

any adverse remarks given logbook.

2. Check the function on MMI for all coaches.

3. Check brake continuity test.

4. Check Signal bell – I continuity.

5. Check Signal bell – II continuity

6. Check working of intercom and PA system.

7. Check working of AWS.

2.0 ACP

2.1 Check working of ACP by pulling handle from each coach (east

& west side) and ensure flag is coming out sufficiently and

getting reset.

2.2 Ensure that coach in which ACP operated is correctly displayed

on the MMI.

2.3 Overhauling and lubrication of ACP mechanism.

3.0 Air Spring Suspension

3.1 Check the foundation allen bolts intactness.

3.2 Check air spring for any cracks, dent marks. leakages and hitting

marks on air spring.

3.3 Check the foundation and fitment of vertical dampers & Replace

if not working.

3.4 Check the Leveling Valve assembly for any leakage & Replace

if required.

3.5 Check the Installation lever and adjust the clearances if found

abnormal.



38

Sr.

No. Items to be checked

Remark

3.6 Check the working of all cocks provided for air spring & Replace

if required.

3.7 Ensure that Leveling Valve installation Rod is in vertical position.

3.8 Ensure proper position of all air springs cocks.

3.9 Drain Air Spring Reservoir and ensure availability of baffle plates

to protect drain cock.

3.10 Check all the Pipes & Couplings for any air leakages and attend it.

3.11 Check for any rubbing / air leakage/ damage to the air spring

flexible hoses and replace if required.

3.12 Ensure availability & intactness of bolster liner locking plate.

3.13 Check the welded joints of Air spring base frame for any crack/

breakages.

3.14 Check the intactness of foundation bolts of 20 ltrs. tank and

healthiness of release valve.

3.15 Check the function of duplex check valve as per work

instructions.

3.16 Ensure the foundation bolt intactness of leveling valve protection

plate.

4.0 Air Drier

4.1 Check for intactness of mounting hardware.

4.2 Check for any air leakage from Duplex piston valve.

4.3 Purging of air dryer with interval of 120 secs.

4.4 Check for alternate operation of regenerative towers.

4.5 Check the healthiness of desiccant by observing colour of

humidity indicator.

Blue = OK,

Yellow = warning

4.6 Check and observe the water content in MR by dew point meter.

4.7 Visual inspection for external damages to air dryer and its pipe

lines.

4.8 Check the tightness of Electrical supply connector.

5.0 Parking Brake

5.1 Check for proper fitment of Parking Brake Cylinder foundation,

Brake Arm, Cup Sleeve, Release handle wire rope etc.

5.2 Check the Parking Brake Cylinders operation, (wheel No. 1-3, 5-7

in DTC and middle NDTC) and ensure physically application and

release of the brakes.

5.3 Check the working of Double Check Magnet valve. Replace If

found leakage / not working.

5.4 Ensure the intactness of Double Check Magnet valve foundation

allen bolts.

5.5 Ensure releasing of brakes with rope handle.



39

Sr.


Remark

6.0 Buffers & Schaku Coupler

61 Ensure the intactness of Cup-Sleeve Bolt.

6.2 Check for any air leakage from MR & BP Pipe bracket, bushing, V

holding and Elbow clamps,

6.3 Check the condition of centering device & leaf spring.

6.4 Check greasing of articulation bearing bolt and condition of bush.

6.5 Clean and lubricate coupler articulation bearing bolt and fiber bush.

6.6 Measure and ensure bogie clearances.

6.7 Check Front screw coupling for any abnormality, lubricate if

required.

6.8 Check intactness of couplers, earthing cables.

6.9 Check draw bar and allen key bolt for proper tightness.

6.10 Check the tightness of check nut and wing nut.

7.0 Piping & Reservoirs

7.1 Check for any air leakage/ rubbing & ensure availability of clamps.

7.2 Check welding joints, split pins, fixing bolts of all the reservoirs.

7.3 Check for any isolation of EP/ AUTO/ Bogie & coupling cocks and

attend if isolated.

7.4 Ensure smooth operation of EP, Auto & Bogie cocks.

7.5 Ensure that bogie cocks are vent type, if found without vent same

to be replaced.

7.6 Ensure EP and Auto cocks are without vent type.

7.7 Check for any Damage to Piping and Cocks & Replace defective /

leaking cocks.

7.8 Check intactness of foundation Bolts of MR, Auxiliary and Air

Spring Reservoirs & Ensure availability of split pins.

7.9 Check the intactness of Reservoirs MS straps.

7.10 Drain all the Reservoirs with drain cocks.

7.11 Check the operation of MR, BP, Bogie isolating and drain cocks &

Replace if any leakage.

7.12 Check for leakage of flexible hoses.

7.13 Observe any sign of air leakage and looseness of end fittings.

7.14 Check rubbing of hose pipes and shifting of end nipples.

7.15 Check MR/BP cocks leakage by closing cocks.

7.16 Ensure cleaning of NRV and pipe line strainers.



40

Sr.


Remark

8.0 BOGIE

8.1 Check Bogie frame, Bolster and coach under-frame for any crack / damages or excessive wear.

8.2 Check coach sole bar and under frame for any cracks / hitting marks.

8.3 Check condition of liner between Bogie & Bolster.

8.4 Check for healthiness and foundation intactness of lateral and vertical friction dampers. Check for signs of oil leakages.

8.5 Check Palm-pull rods for any crack / bend.

8.6 Check condition of bushes, pins and safety Chains.

8.7 Check availability of pins with Bulb Cotters & Split Pins.

8.8 Check Side Bearer for Crack or Oil Leakage.

8.9 Check for Side Bearer cover jam / loose.

8.10 Check and ensure the intactness of Cattle guard, Buffer foundation Bolts.

8.11 Check for hitting/rubbing between bolster and bogie in lateral direction. Check for condition of liner plate and proper clearance.

< 3mm

8.12 Check brake shoe hanger assembly for any excessive play, crack & damages.

8.13 Check intactness of rubber snubbers and crown packing on axle box.

8.14 Check for any damage or abnormality on brake yoke assembly.

8.15 Check the condition of safety brackets and intactness of fixing bolt.

8.16 Check height of cattle guard from rail level. 150 to200 mm

9.0 BRAKE CYLINDER

9.1 Check fixing Bolts of Brake Cylinders for any damage or

slackness.

9.2 Check Brake Rigging parts i.e. pins, Nut Bolts, Cutters, Split Pins,

Brake Block key, Brake shoe head pins for missing, worn out, slackness.

9.3 Check Brake Hanger Safety Brackets and Safety Stopper Plates are

intact.

9.4 Replace worn out Brake Blocks.

9.5 Check Brake Cylinder Piston not infringing with U Bracket in

brake applied condition.



41

Sr.


Remark

10.0 BRAKE BLOCK

10.1 Adjust gap between brake blocks and wheel in released condition. 12 mm to 15 mm

10.2 Ensure tightness of brake shoe key.

11.0 BRAKE RIGGING

11.1 Check Nuts, Bolts, Pins, Cotters, Bush, and Washers for intactness

and wear, replace if required.

11.2 Ensure availability of Stopper Plates.

11.3 Check Brake Hangers, Brake Beams and other Brake Rigging

components for intactness and wear.

11.4 Lubricate all the moving parts by applying oil / grease.

12.0 DASHPOT

12.1 Check the oil level, top up if required. Record the quantity of oil

topped up in Dash pot.

MC 97 mm

12.2 Check DashPot bottom rubber packing for torn & damage.

12.3 Check intactness of dashpot safety loop brackets. Ensure

intactness of oil filling nipples / cap.

13.0 WHEEL & AXLE BOX

13.1 Check for tilting of Axle Box.

13.2 Check Wheel with tapping hammer for any dull sound, intactness

of keys and glut ring, crack, flow of metal at surface.

on tyred wheels

13.3 Check and record the wheel size.

13.4 Check Axle Box cover for any crack and grease leakage.

13.5 Check Axle Box Covers for intactness of bolts and availability of

Split Pins.

13.6 Check the Wheel for Flat, Chipping and other defects.

13.7 Take Wheel profile and check for wheel defect such as shell tread,

Grooved / Flat tyre, Sharp flanges, Deep Flanges, Thin Flanges,

Root Wear & other defects.

13.8 Visually check for any abnormality like disc shifting Axles, MSUs

etc.

13.9 Check the temperature of Axle boxes with the help of temperature

gun.

While rake is

placed in shed

14.0 FURNISHING ITEMS

14.1 Ensure healthiness of both side curtains and V-Cool films in both

D-Cabs.

14.2 Check M/man seat for smooth up/down and Forward/ Reverse

movement operation.



42

Sr.


Remark

14.3 Check Grab Handles and Center Pole for proper intactness and

welding & Provide missing grab handles.

14.4 Check operation (open/close/locking) of D/cab doors and

windows.

14.5 Check operation (open/close/locking) of doors in passenger area /

check for any damages.

14.6 Check the seats for any damage and foundation bolt intactness.

Attend broken Seats & Seat Frames and torn first class seats.

14.7 Ensure availability of safety cover of Articulation Bearing bolt.

14.8 Check in Handicap compartment for passenger amenities.

14.9 Clean the drain holes on the flooring in passenger area.

14.10 Check the interior & exterior stenciling of coach.

14.11 Ensure intactness of Door way side partition foundations.

14.12 Ensure intactness Coach body end panel partition.

14.13 Ensure intactness Partition SS sheet welding and molding screw.

14.14 Ensure intactness of the hatch door bracket welding from inside

14.15 Ensure intactness of hatch door nut and bolt from inside.

14.16 Ensure intactness of hatch door screw from outside.

14.17 Ensure intactness of hatch door fixing chain and clamp inside the

HT compartment.

15.0 TESTING

15.1 Put MMI in maintenance mode & Switch on DCS and observe

on MMI.

i) Applica./tion of holding brakes in all coaches.

ii) DCS key “ON” position 0.8 Kg/cm2

iii) DCS key “OFF” position 1.2 Kg/cm2


i) Application Timing 4-6 sec





15.4 Emergency brake with Power Brake Controller

i) Application Timing 4-6Sec




43

15.5 Emergency brake with Pneumatic Brake Controller



iii) Check EP application and releasing time.

iv) Check Auto application and releasing time.

15.6 Check Emergency application and releasing time.

15.7 Check working of Brake Controller at all positions & Ensure No

leakage from Brake Controller in release / auto lap position.

15.8 Ensure No air leakage from EP unit in both released and applied

condition.

15.9 Ensure no EP Unit should be Hunting.

15.10 Ensure the provision of safety valve in all brake units.

15.11 Ensure the functioning of Brake Unit Safety Valve by applying

Auto Brake .

15.12 Ensure functioning of Emergency Valve in normal and RDM.

15.13 Ensure functioning of Guards Emergency Brake.

15.14 Check all Brake Cylinders for Leakage.

Sr.


Remark

16.0 PNEUMATIC TESTING

16.1 Check BP pressure charging time from both cab 0 to 4.7

kg/cm2.

2.5 to 3 minutes

for 12 car rake

16.2 Measure brake pipe pressure on Duplex gauge.

i)


BP Cab-1_______ BP Cab-1_______

BP Cab-2 _______ BP Cab-2_______ * Pressure difference in both Cab's RDK should not be

> 0.1kg/cm2

ii)


BP Cab-1_______ BP Cab-1_______

BP Cab-2 _______ BP Cab-2_______

16.3 Check 1.0 kg/cm2 MR pressure dropping time. 10 minutes

16.4 Check 1.0 kg/cm2 BP pressure dropping time. 10 minutes

16.5 Check MR and BP drop test in 10 minutes, <1.0 kg/cm2.



44

16.6 Ensure MR and BP pipe pressure continuity.

16.7 Ensure proper working of Duplex Pressure Gauge, BC Gauge,

Parking Brake and Guard's Gauge.

16.8 Ensure physically application & release of Parking Brake and

on MMI.

16.9 Ensure Parking Brake gauge shows 0.0 kg/cm

2 pressure in


16.10 Ensure the working of Parking Brake Push button.

16.11 Ensure smooth operation of Horn Foot Valve.

16.12 Ensure quality sound of horns.

16.13 Ensure correct position of check nut in Escort make ICS.



45

12.9 POH SCHEDULE FOR AC/DC SIEMENS EMU RAKES

Sr.

No. Description

Std

Parameters

POH

(18 Months)

1.0 DRIVING-CABS

1.1

Check & ensure smooth operation of all push buttons

(DVR desk) and replace if required. Ensure provision

of all the labels.

OK YES

1.2 Entering neutral section (ENS) (Condition basis) OK YES

(i) Light set / trip.(Condition basis) OK YES

(ii) Fan set / trip.(Condition basis) OK YES

(iii) SB1-100% replacement. OK YES

(iv) Check operation of all switches (E-cabinet & DVR

desk) & replace if required. Ensure provision of all the

labels.

OK YES

1.3 Pan UP & Down (Condition basis). OK YES

(i) MC ON & OFF switches replacement to be done

100%.

OK YES

(ii) Calibration and testing of AWS speedometer, Techo

Generator and speed Recorder with Techo Generator.

Done YES

1.4 Check condition of all MCB's (E-cabinet). Done YES

1.5 Replace defective indication LEDs, MCBs, rotary

switches & push buttons.

Done YES

1.6 Check for availability of labels on E-cabinet, Provide

missing labels.

1.7 Clean and overhaul cab fans, Replace carbon brush. Done YES

1.8 Calibrate all pressure gauges (guard gauge, Duplex

gauge, PB & BC)

Done YES

1.9 Clean the drivers desk area and under the desk with

vacuum cleaner.

Done YES

1.10 Clean Cab light Reflectors. Done YES

1.11 Change the lamps of head light, Aux head light and

cab light.

Done YES

1.12 Check the working of spot light. OK YES

1.13 Check the working flasher light in both normal &

standby mode.

OK YES

1.14 Check the working of H/L & S/L both in normal &

standby mode.

OK YES

2.0 MASTER CONTROLLER

2.1 Check operation of Master Controller and lubricate the

cam switches as per OEM instruction.

OK YES



46

Sr.

No. Description

Std

Parameters

POH

(18 Months)

2.2 Replace the defective Micro switches / cams if any

and ensure proper tightness of fasteners as per specified torque.

OK YES

2.3 Visual check all electrical connections and their

intactness.

OK YES

2.4 Ensure that dead man valve operates at specified

angle.

OK YES

2.5 Ensure that "T" handle is not loose and there is no

excessive play.

OK YES

2.6 Overhauling of master controller & testing on

endurance test bench.

OK 2nd

POH

3.0 MMI

3.1 Functional test of MMI. Done YES

3.2 Ensure working of MMI cooling fan. Clean the fan. Done YES

4.0 COACH LIGHTS

4.1 Ensure working of all tube lights and emergency

lights. Replace defective fittings.

OK YES

4.2 Clean all the reflectors of coach lights. OK YES

4.3 Replace the reflector frame air tight gaskets if

required.

OK YES

4.4 Ensure setting and tripping of light from both D/cabs. OK YES

4.5 Replace tube lights (Condition basis) OK 2nd

POH

4.6 Replace 100% electronic ballasts (Condition basis ) OK 2nd

POH

5.0 FANS

5.1 Clean the fans, replace defective guards and blades. OK YES

5.2 Ensure 100% of working fans. OK YES

5.3 Check availability and tightness of all fixing, cover

and guard.

OK YES

5.4 Replacement of capacitor of carriage fans. OK 2nd

POH

5.5 Ensure noise free running, replace Bearings if

required.

OK YES

6.0 END PANELS

6.1 Open and blow out the dust. Done YES

6.2 Clean the terminals with Nylon brush. Done YES

6.3 Check the tightness of connection in the train line

junction box.

Done YES

6.4 Check condition of lugs, sleeves & number ferrules. OK YES



47

Sr.

No. Description

Std

Parameters

POH

(18 Months)

6.5 Check the operation of all MCB's. Replace defective

MCBs.

Done YES

6.6 Check & ensure the tightness of 415 v three phase

connections and terminals.

OK YES

6.7 Visually check and ensure the operation of light /fan

contactor, change over contactor, MAC contactor.

Replace if tips are found flashed. Ensure provision of all the labels.

OK YES

6.8 Check the operation and function of all motor

protection switches (MPS). Replace defective

switches.

OK YES

7.0 PNEUMATICS & BRAKES

7.1 Overhaul and test of all Brake Equipment. Done YES

7.2 Over haul & test Dead-man magnet valve, AWS Feed

Cut- Off Valve, Exhaust Valve and Emergency Valves.

Done YES

7.3 Overhaul Non Return Valves. Done YES

7.4 Replace damaged / leaking drain cocks. OK YES

7.5 Overhaul & test Brake Cylinders. OK YES

7.6 Check condition of MR, BP hoses & replace if

defective.

OK YES

7.7 100 % replacement of MR, BP flexible hoses. NA 4th POH

7.8 Calibrate all the pressure governor.

A) Control Governor 3.4 to 4.2

kg/cm2.

YES

B) Equipment Governor 4.6 to 5.6

kg/cm2

YES

C) Main Comp Governor 6.0 to 7.0

kg/cm2

YES

D) Aux Comp Governor 5.3 to 6.3

kg/cm2

YES

E) Parking Brake Governor 2.0 to 3.0

kg/cm2

YES

7.9 Overhaul all the strainers and filters & Replace rubber

items.

Done YES

7.10 100% Replacement of filter elements. Done 4th POH

7.11 Check operation and lubricate isolating cocks. Replace

defective cocks.

OK YES

7.12 Overhaul Auto Drain Valves. Done YES



48

Sr.

No. Description

Std

Parameters

POH

(18 Months)

7.13 Overhaul Panto Set-Trip Magnet Valves. Done YES

7.14 Overhaul Panto Isolating Cock and Throttle Valves. OK YES

8.0 PIPING & RESORVOIERS

8.1 Check the welding joints, split pins, fixing bolts of

MR, Aux. and Air spring reservoirs for intactness.

OK YES

8.2 Check the intactness of MS straps of all the reservoirs. Done YES

8.3 Check for hitting marks and attend if any. Done YES

8.4 Ensure that the pipes are not rubbing with coach body

or bogie frame etc.

Done YES

8.5 Ensure the availability of Baffle protection plates for

drain cocks to arrest damage due to ballast hitting.

Done YES

8.6 Check the availability of proper pipe line clamps as

per the ICF Drg.

Done YES

8.7 Pressure testing of reservoir at 10 Kg/cm2 Done 2

nd POH

9.0 GUARDS EMERGENCY BRAKES

9.1 Overhaul Guard Emergency brake valve and ensure its

smooth operation.

OK YES

9.2 Ensure that the handle "ON-OFF" position is proper. OK YES

10.0 PARKING BRAKES

10.1 Overhaul the parking brake cylinder, Double check

magnet valves & pressure reducing valve.

Done YES

10.2 Check for proper fitment of parking brake cylinder,

brake arm, cup sleeve and release handle etc.

Done YES

10.3 Check parking brake operation on wheel no.1,3, 5&7

in 'C' coaches. Verify application and release of the brakes.

Done YES

11.0 SHUNTING CAB

11.1 Check smooth operation of all switches & push button

and ensure healthiness of indication lamps.

OK YES

11.2 Check the working of Battery Selector Switch. OK YES

11.3 Check for smooth working of master controller. OK YES

11.4 Check the working of Shunting Cab Gauges & Meters. OK YES

11.5 Clean the Shunting Cab area and under the desk with

Vacuum Cleaner.

OK YES

11.6 Check the condition of flexible hoses of pantograph,

changeover switch and VCB. Replace if found defective.

OK YES

11.7 100 % replacement of all the hoses. Done 4th POH



49

Sr.

No. Description

Std

Parameters

POH

(18 Months)

12.0 MAIN COMPRESSOR

12.1 Clean externally compressor body & the radiator. OK YES

12.2 Replace air suction filters. Done YES

12.3 Check the condition of drain plug for sticking up of

metal particles.

Done YES

12.4 Check condition of top and bottom Rubber Gaskets.

Replace if found defective.

Done YES

12.5 Check for any oil or air leakage from joints, suction or

delivery pipes and attend.

Done YES

12.6 Overhaul and calibrate safety valve setting. 8.5 Kg/cm2 YES

12.7 Check condition of resilient mounting for intactness. OK YES

12.8 Check for any crack/intactness of base frame. OK YES

12.9 Check vacuum indicator on silencer (suction filter)

i)Colourless-ok ii) Red Colour - Suction filter defective

OK YES

12.10 Replace lubricating oil. OK YES

12.11 Ensures availability all fasteners. OK YES

12.12 Ensure proper tightness of delivery pipe. OK YES

12.13 Ensure the healthiness of mounting wire ropes. OK YES

12.14 Overhaul the Resilient mounts. OK 2nd

POH

12.15 Check operation of compressor by way of observing

running sound, feel temperature by hand.

OK YES

12.16 Remove and Overhaul as per OEM manual. OK 4th POH

(Knorr)

2nd

POH

(ELGI)

12.17 Check pressure built up time of each Unit (0- 7

kg/cm2).

6 minutes YES

13.0 AUXILIARY COMPRESSOR

13.1 Replace lubricating oil. Done YES

13.2 Clean externally including the surrounding area. Done YES

13.3 Replace suction filter. Done YES

13.4 Check the tightness of foundation bolts and other

fasteners.

Done YES

13.5 Clean the commutator with compressed air/ Charmis

leather & replace the carbon brushes.

Done YES

13.6 After maintenance carry out an efficiency test. Record

pressure build up time from 0 to 5.0 kg/cm2

4 minutes YES



50

Sr.

No. Description

Std

Parameters

POH

(18 Months)

13.7 Check operation of compressor by way of observing

running sound and temperature.

OK YES

13.8 Ensure air blowing of pipe lines connected to Aux.

compressor.

Done YES

13.9 Overhaul NRV & ' T' Strainer. Done YES

13.10 Overhaul and calibrate safety valve. OK YES

13.11 Remove and overhaul as per OEM manual Done 2nd

POH

14.0 AIR DRIER

14.1 Check mounting arrangement of Air Drier for

intactness.

OK YES

14.2 Overhaul the Duplex Piston Valve and Replace all

"O"rings.

OK YES

14.3 Replace final filter element. OK YES

14.4 Check for any leakage from Air Drier. OK YES

14.5 Check proper working of air dryer as under;

a) Purging of air dryer with interval of 120 sec.

b) Check the alternate operation of cooling towers.

c) Check the healthiness of desiccant by observing

colour indicator

(Blue = OK, Yellow = warning, Red = Not OK)

Done YES

14.6 Overhaul as per OEM's Manual. Done YES

15.0 BATTERY

15.1 Clean and Overhaul Battery set as per OEM’s manual Done YES

15.2 Clean the battery box & trolley OK YES

15.3 Ensure proper working of trolley the door hinges. OK YES

15.4 Ensure compact placement of battery cells to avoid

relative movement during run.

OK YES

15.5 Change the battery set with new one every 4.5 years

(54 months).

Done 3rd

POH

16.0 AC-DC EARTHING SWITCH

16.1 Check the condition of moving & fixed contact and

locking mechanism.

OK YES

16.2 Check AC & DC Earthing Switch for smooth

operation and intactness.

OK YES

16.3 Check of Kaba keys. OK YES

16.4 Overhaul the switch as per OEM's manual. OK 4th POH

16.5 Check for intactness of copper flexible braids &

earthing shunts. Replace if found broken / flashed.

OK YES



51

Sr.

No. Description

Std

Parameters

POH

(18 Months)

17.0 TRANSFORMER

17.1 Ensure the oil level in transformer. Check for any oil

leakage. Top up if required.

OK YES

17.2 Check transformer for hitting or damage to any part. No hitting /

damage

YES

17.3 Check condition of HV Cable Head Bushing for

tightness.

OK YES

17.4 Check silica gel for any colour change Heat/ replace if

required.

Orange YES

17.5 Clean radiator with dry compressed air. Done YES

17.6 Clean transformer with dry compressed air. Done YES

17.7 Check transformer oil pump for any leakage &

abnormal sound.

No leakage YES

17.8 Check BDV of the transformer oil. Filtration to be

done if required.

50 kV YES

17.9 Conduct test on oil samples as per OEM manual. OK YES

17.10 Ensure the healthiness of sensors and their wiring. OK YES

17.11 Check the healthiness of radiator fans and ensure

proper direction of rotation.

OK YES

17.12 Check IR of primary and secondary winding. OK YES

17.13 Check for proper functioning of Oil flow, oil level and

temperature sensors.

OK YES

17.14 Ensure the healthiness of pressure relief valve. OK YES

17.15 Ensure the healthiness of oil level indicator (Visual

glass type).

OK YES

17.16 Overhaul the Resilient mounts. Done 2nd

POH

18.0 CABLE HEAD TERMINATION ( CHT )

18.1 Check and clean the bushing & ensure its healthiness. Done YES

18.2 Check intactness HV bushing clamps in under-frame

and on roof.

OK YES

18.3 Replace CHT. Done 8th POH

19.0 TRACTION MOTOR

19.1 Visual inspection for any damage or rubbing. OK YES

19.2 Ensure intactness of all the Fasteners. OK YES

19.3 Check Earthing brush (ERB) assembly. Replace Brush

If found half worn.

OK YES

19.4 Check intactness of body earthing. OK YES



52

Sr.

No. Description

Std

Parameters

POH

(18 Months)

19.5 Check the condition of Air below / duct for any

damage and intactness of all fasteners.

OK YES

19.6 Clean suction air filters by dry compressed air. Done YES

19.7 100% replacement of suction filters. Done Every POH

19.8 Open junction box and check for connection tightness,

flashing or overheating marks.

Done YES

19.9 Clean the metal particles from the magnetic oil drain

screw on gear case.

OK YES

19.10 Blow TM with the help of dry compressed air. Done YES

19.11 Re-grease the motor bearing (N-End) Shell Retinax

LX2 (H3 17) Qty. 26 Gms.

Done YES

19.12 Change the Gear Oil after cleaning the Gear Case

internally.

Done YES

19.13 Ensure proper Cleating and Routing of TM cables. Done YES

19.14 Check IR and continuity of stator winding. Done YES

19.15 Check the winding resistance with DLRO. Done YES

19.16 Check pinion teeth for any dent / pitting marks or

wear.

Done YES

19.17 Replace the hard ware items, gaskets, felts and

sealants of gear-case.

Done YES

19.18 Check the lugs for proper crimping and over-heating

marks.

Done YES

19.19 Check for proper intactness of cable screen earthing

near cable ground.

Done YES

19.20 Check the condition of bearing by Shock pulse meter. Done YES

19.21 Assemble the motor on bogie and green run test in

both direction for 2 Hrs.

Done YES

19.22 Check for any oil leakage or abnormal sound from TM

and MSU and record temperature rise of DE & NDE TM & MSU bearings.

OK YES

19.23 Light run motor at rated speed and ensure bearing

testing by SPM/vibration meter.

OK YES

19.24 Complete Overhaul the traction motor. OK 8th POH

20.0 MOTOR SUSPENSION TUBE UNIT (MSU)

20.1 Check housing bolts are intact. OK YES

20.2 Check for proper fitment of adjustment washer. OK YES

20.3 Check for any cracks or damage to MSU. OK YES

20.4 Topping of bearing grease by Shell Retimax LX2 (H3 OK YES



53

Sr.

No. Description

Std

Parameters

POH

(18 Months)

17) Qty. 300grms.

20.5 Dismantle MSU and overhaul as per OEM's manual. Done 4th POH

21.0 High Speed Circuit Breaker (HSCB)

21.1 Visually check for any damage etc. OK YES

21.2 Clean the arc-chute horn. OK YES

21.3 Check surface finish of contacts for pitting / flashing

marks.

OK YES

21.4 Measure contact wear. Replace worn out contacts. OK YES

21.5 Check condition of Inrush resistance. Measure

variation.

OK YES

21.6 Replace of main contacts, arc chutes & closing device

components.

OK 2nd

POH

21.7 Dismantle and Overhaul as per OEM's manual. OK 4th POH

22.0 CONTACTORS (K1 & K4, K5 & K6)

22.1 Clean magnetic core and insulating parts by

compressed air.

Done YES

22.2 Check the surface of electromagnet and clean with

alcohol if needed.

OK YES

22.3 Check the condition of Main & Auxiliary Contacts. OK YES

22.4 Check the condition of arc-chutes. OK YES

22.5 Check for smooth closing of magnet valve without

jamming at 55% Ve.

OK YES

22.6 Check that the two poles of contactor closes

simultaneously.

OK YES

22.7 Check the wear of main and aux. contacts. Replace worn out contacts.

OK YES

22.8 Check value of pre charging resistors. OK YES

22.9 Dismantle and Overhaul as per OEM's manual. Done 4th POH

23.0 VCB

23.1 Check for any damage and tightness of connectors and

magnet valve coil.

OK YES

23.2 Check for crack, chip and flash mark on insulators. OK YES

23.3 Clean the insulator with dry and clean cloth. OK YES

23.4 Check for damage to connection to earthing isolator.

Cleaning and greasing if required.

Done YES

23.5 Check HV connection tightness. Done YES

23.6 Check torque of VCB fixing screw. 70Nm YES



54

Sr.

No. Description

Std

Parameters

POH

(18 Months)

torque

23.7 Check the earth connection tightness. 70Nm

torque

YES

23.8 Check & set value of pressure regulator. 4.5±0.1

kg/cm2

YES

23.9 Drain air reservoir tank. Done YES

23.10 Check for any air leakage in VCB. Done YES

23.11 Check the cable and lugs for breakage & looseness of

auxiliary switch.

Done YES

23.12 Check the working order of each auxiliary switch. Done YES

23.13 Check auxiliary switch screw for damage. Done YES

23.14 Check auxiliary switch moving contact for its

continuity

OK YES

23.15 Securing of auxiliary switch and support plate. OK YES

23.16 Check proper fixing/sticking of shock absorber plate

in cylinder mounting plate.

OK YES

23.17 Check setting of pressure switch. Done YES

23.18 Check the tightness of pneumatic connection of

pressure switch.

Done YES

23.19 Check the contact spring. Done YES

23.20 Weight the air dryer, if increase in weight is more than

0.8 kg from new weight, regenerate molecular sieve by

heating and replace if required.

Done YES

23.21 Check the healthiness of EP valve coil résistance

(1510Ω ± 8 at 35° C).

Done YES

23.22 Check the air leakage from piston assembly. OK YES

23.23 Replacement of filter cartridge with `O' ring of

pressure regulator.

OK YES

23.24 Check the closing and opening speed. OK YES

23.25 Check the sealing connectors, Flexible Pipe,

regulators, air tank etc.

OK NA

23.26 Lubricate drive plate assembly, shafting head bearing

guides, vertical spring, flexible braids, piston seal,

piston rod & EP valve.

OK YES

23.27 Torque tightening - 1) rear flange, 19.3 NM YES

2) Shafting head 193NM YES

3) Vertical insulator 67NM YES

4) Bolts of cover for holding 67NM YES



55

Sr.

No. Description

Std

Parameters

POH

(18 Months)

cylinder

5) air tank mounting nuts 39.4NM YES

23.28 Inspection of main contacts wear in vacuum switch

tube.

OK YES

23.29 Overhaul the VCB as per OEM's instruction and

RDSO SMI.

Done YES

24.0 BRAKING RESISTOR

24.1 Visual check for any damage to grid, flashover. OK YES

24.2 Air Blowing /cleaning by water jet to be done of entire

unit.

OK YES

24.3 Check for HT connection intactness. OK YES

24.4 Spray cleaning solution on the resistor after removing

the cover and terminal box from housing and wash by

using water jet and dry it with compressed air.

Note: cleaning should be done only after cooling of resistors

OK YES

24.5 Check the ceramic parts if show sign of damage to be

replaced.

Done YES

24.6 Dismantle and Overhaul as per OEM's manual. Done 4th POH

25.0 L.A., C.T. & P.T.

25.1 Check for any abnormality Clean the insulators. OK YES

25.2 Check IR continuity. OK YES

25.3 Check the cable connections and tightness. OK YES

25.4 Check & replace the PT secondary fuse if required. OK YES

26.0 PANTOGRAPH (ROOF EQUIPMENT)

A M/s SCHUNK

26.1 Replacement the rubber/ PVC air pipe. OK YES

26.2 Replacements of air bellow if any air leakage. OK YES

26.3 Check & adjust the static contact force. OK YES

26.4 Check the setting of control box Safety Valve. 10.5Kg/cm2 YES

26.5 Replacement of defective lock of pneumatic control

Box

12.5 kg/cm2 YES

26.6 Check the intactness all fasteners and ensure tightness

as per specified torque in OEM manual.

OK YES

26.7 Clean the mounting insulators with VIM powder. OK YES

26.8 Replacement of flexible copper shunts if more than

25% strands are broken

OK YES



56

Sr.

No. Description

Std

Parameters

POH

(18 Months)

26.9 Overhauling & cleaning of pressure regulator pre-

filter.

OK YES

26.10 Check and attend if any air leakage from pneumatic

control box.

OK YES

26.11 Rocker Assembly: Check rocker suspension, Leaf

springs and spring supports if found hit marks,

damaged or bent etc. Replace complete rocker assembly if any defect noticed.

OK YES

26.12 Check the parallelity of Air bellows. OK YES

26.13 Check the horizontal displacement of pantograph. OK YES

26.14 Transverse deflection with 300N at a height of

1800mm , -VE & +VE side

20-30mm YES

26.15 Visual inspection of hydraulic dampers for any oil

leakage & replace if required.

OK YES

26.16 Check and adjust Pressure Regulating valve and lock

the check nut with torque mark.

OK YES

26.17 Overhaul complete pantograph & test. Done 2nd

POH

B M/s SIL

26.18 Check for any sign of external hitting / damages /

cracks on Panto Pan, Rocker Assembly, Lower

Frame, Upper Frame, Base Frame, Coupling Rod,

Raising Springs, Tension bolts, Anti-balancing rod,

upper articulation, Lower articulation, Eye-let Rod and

Other Sub Assemblies of pantograph. In case of any abnormality replace it.

OK YES

26.19 Replace the bow assembly with replenish copper

strips.

OK YES

26.20 Ensure availability of all Bolts, Nuts, Lock-Nuts,

Spring Washers, Split pins etc. of various fittings.

OK YES

26.21 Ensure intactness of middle Articulation Assembly

shaft check nut. (36 mm + 5 mm)

OK YES

26.22 Check Lower Frame Assembly & Upper Frame

Assembly for excessive lateral play (transverse).

OK YES

26.23 Check Bow Plunger is sliding freely while pressing

and split pins are available.

OK YES

26.24 Overhaul Servo motor, Throttle Valve, Magnet Valve. OK YES

26.25 Check for free movement of servo motor piston rod

and eyelet rod.

OK YES

26.26 Ensure availability of all flexible shunts and check that


OK YES

26.27 Ensure provision of steel bracket on lower articulation OK YES



57

Sr.

No. Description

Std

Parameters

POH

(18 Months)

to prevent earthing of anti balancing tube after uncoupling.

26.28 Check whether rubber stopper on the base frame and

MS bracket on lower articulation is provided to

prevent over turning of panto in unwired section.

OK YES

26.29 Check & record Raising and Lowering time of

Pantograph (6-10 Sec).

OK YES

26.30 Ensure pantograph is raising in three steps (3-Steps). OK YES

26.31 Clean all the Insulators with vim powder & dry cloth. OK YES

26.32 If flashing marks noticed on the insulators Replace it

with new one.

OK YES

26.33 Check and ensure that there is no Air Leakage from

the Panto magnet valve .

OK YES

26.34 Check panto tension

10.5 Kg (Shunk) / 9.5 Kg ( SIL)

OK YES

27.0 INSULATORS & PANTO ZONE

27.1 Check the insulators for any crack / damages /

chipping marks etc. if hair line crack suspected, see with magnifying glass and replace the insulator.

OK YES

27.2 Thoroughly clean all the insulators with dry cloth and

after vim powder.

Done YES

27.3 Replace flashed/painted insulators. Done YES

27.4 Blow the roof equipment by compressed air. Done YES

27.5 Check and tighten the panto insulator bolts. OK YES

27.5 Apply anti tracking paint on the base frames of roof

equipment & Roof line & panto mounting insulators.

OK YES

28.0 ROOF BARS

28.1 Check roof bar connection and ensure tightness. OK YES

28.2 Ensure greasing of all greasing points of pantograph. Done YES

28.3 Megger the panto pan by disconnecting the cable to

Panto.

OK YES

28.4 Clean the roof bar insulators with vim powder. OK YES

29.0 ROOF GENERAL

29.1 Replace damaged roof cable cleats. OK YES

29.2 Check PCP sheet for any bulging, uprooting. Attend if

required.

OK YES

29.3 Check the catwalk for any damages and proper taping

of insulation tape over the brackets.

OK YES



58

Sr.

No. Description

Std

Parameters

POH

(18 Months)

29.4 Cable termination and other junction box to be sealed

properly to avoid water entry.

OK YES

29.5 Overhauling lubrication and testing of ACP

mechanism.

Done YES

29.6 Ensure no leakage from roof. Carry out testing by

pressure jet and attend the leakage.

OK YES

30.0 TCU

30.1 Check air intake and outlet opening are un-obstructed. OK YES

30.2 Clean suction filter of TCU by the compressed air. OK YES

30.3 Check electrical connection for corrosion and

tightness.

OK YES

30.4 Check the grounding connection for corrosion &

tightness.

OK YES

30.5 Check cables and connections for proper tightness. OK YES

30.6 Check that cable ties are not loose. OK YES

30.7 Check that warning levels on the cover are clean. NO YES

30.8 Cleaning the ventilated section after removing 2

covers at back side of cabinet.

OK YES

a) Clean the equipment section with vacuum cleaner

and compressed air.

OK YES

b) Check the seal on the cover, if required clean and

apply Vaseline or talcum powder.

Done YES

30.9 Cleaning the unventilated section after removing all

covers (don’t use compressed air).

OK YES

a) Vacuum or brush out the equipment section in

component (use lint free cloth).

Done YES

b) Check the seal on the cover, if required clean and

apply Vaseline or talcum powder.

Done YES

30.10 Blowers along with motors to be overhauled. Done 4th POH

30.11 Replace auxiliary fans. Done 4th POH

31.0 ACU

31.1 Isolate the Aux. converter, open the front door and

ground it.

Done YES

31.2 Inspect the arc quenching chambers and switch

elements.

Done YES

31.3 Visually check whether arc quenching chambers

exhibit mechanical damage or metal deposits.

Done YES

31.4 Visually inspect whether material deposits have

occurred at the power contacts.

OK YES



59

Sr.

No. Description

Std

Parameters

POH

(18 Months)

31.5 In events of faults replace the defective component. If

the protection is in order re-attach the arc quenching chamber.

OK YES

31.6 Inspect the components for any damage and check that

they are firmly sealed. (discoloration or mechanical

damage)

OK YES

31.7 Check the power modules, controls, fans and current

& voltage sensors.

Done YES

31.8 Check healthiness ACU internal cabling. Done YES

31.9 Check the tightness of line connections. OK YES

31.10 Inspect the plugs for corrosion and proper contact. OK YES

31.11 Check the tightness of plug clamping screws. Replace

if needed.

OK YES

31.12 Open the pivoting frame and clean the fan with

vacuum cleaner.

Done YES

31.13 Mount the fan cover panel (8XM6 torque - 6.5Nm),

close the pivoting frame (2XM8 torque -15Nm) tight.

Done YES

31.14 Fan to be removed and fan area to be cleaned. Done YES

31.15 Anti corrosion bags to be replaced. Done YES

31.16 Cleaning of air intake point, air duct and cooling ribs

etc.

Done YES

31.17 Power module fans to be replaced. Done 4th POH

31.18 Check the cable connection of fuses & ensure the

healthiness of fuses.

Done Every POH

32.0 CCU

32.1 Clean the dust with soft brush and vacuum cleaner. Done YES

33.0 BECU

33.1 Check for any abnormality. OK YES

33.2 Clean with Vacuum Cleaner. OK YES

33.3 Check speed sensor intactness provided in C coach. OK YES

34.0 TRAIN LINE JUNCTION BOX

34.1 Open and blow out the dust with compressed air. Done YES

34.2 Clean the terminal with nylon brush. OK YES

34.3 Check tightness of all the connections. OK YES

34.4 See that all wires are numbered. OK YES

35.0 AHU



60

Sr.

No. Description

Std

Parameters

POH

(18 Months)

35.1 Remove the filter from the coach, clean it by

immersing the filter in a tank filled with

soap/detergent water (mild hot). The jet of high

pressure air should not be used for cleaning.

Done YES

35.2 Replaced the damaged ventilation filters. Done YES

35.3 Verify the healthiness of stainless steel earthing block

welded to coach end wall. They should be clear and free from paint residues.

OK YES

35.4 Check the intactness of electrical connection after O/H

of the AHU.

OK YES

35.5 Check the blower for any abnormal sound and attend. OK YES

35.6 Remove and Overhaul the blowers. Done 4th POH

36.0 BLOWER MOTORS (TCU, ACU, Radiator fan)

36.1 Check the direction and working of all blower motors. OK YES

36.2 Ensure No blower motor working with abnormal

sound.

OK YES

36.3 Measure Phase current of all the Blower Motor by

tongue tester.

OK YES

36.4 Grease the bearing of the pump using grease gun and

nipple

Done YES

36.5 Remove the auxiliary motors and Overhaul Done 4th POH

36.6 Check the availability of Equi-potential Cables &

Bogie to Coach sole bar Earthing Shunts.

OK YES

37.0 SIBAS KLIP STATION & MVB REPEATER

37.1 Check visually for any abnormality. OK YES

37.2 Clean with help of soft brush. Done YES

37.3 Check the tightness of connection in KLIP station and

contactor panel.

OK YES

38.0 AC-DC COS

38.1 Visual inspection of insulators, contacts and

foundations.

OK YES

38.2 Cleaning of insulators. OK YES

38.3 Inspection of disconnecting knife and contact spring. OK YES

38.4 Check revolving mechanism for free movement. OK YES

38.5 Checking of operation of pneumatic cylinder and

EMV valve.

OK YES

38.6 Replace damaged and faulty parts. OK YES

38.7 Measure the contact spring contact force. 20-40 N YES



61

Sr.

No. Description

Std

Parameters

POH

(18 Months)

38.8 Contact Opening. 10mm YES

38.9 Overhauling of AC-DC COS. Done 2nd

POH

39.0 BOGIE

39.1 Lift the coaches, clean the bogies and check for cracks

and attend.

Done YES

39.2 Replace defective/worn out bogie parts sub

assemblies.

Done YES

39.3 Complete dismantling and overhauling. Done YES

39.4 Ensure square-ness of bogie frame By trammling

gauge.

Done YES

39.5 Check the centre pivot pin for any crack/ breakages

and Replace with single piece forged type C.P. pin if

required.

OK

YES

39.6 Replace non standard guide bush of centre pivot body

bolster if required.

OK YES

39.7 Check for any abnormalities of side bearers, covers,

wearing piece, wearing plate & housing and attend for

leak proof by providing oil top up arrangement.

OK YES

40.0 BRAKE CYLINDER

40.1 Overhaul. Done YES

40.2 Check fixing bolts of brake cylinders for any damages

or slackness.

OK YES

40.3 Check brake rigging parts i.e. pins, nut bolts, cutters,

split pins of brake block key shoe head pins for missing, worn out, slackness.

OK YES

41.0 BRAKE RIGGING

41.1 Replace all brake blocks. Done YES

41.2 Ensure gap adjustment between brake block and

wheel. >12 mm YES

41.3 Ensure tightness of brake shoe key. OK YES

41.4 Check Pins, nuts, bolts, cotters, washers for worn out,

breakages and stopper plate. Tighten them and replace

if required.

OK YES

41.5 Check Brake hangers, brake beams, and other brake

rigging components. Replace if required.

OK YES

41.6xx Replace the brake hanger nylon bush. Done YES

41.7 Lubricate all the moving parts. OK YES

41.8 Check the condition of safety brackets and looseness

of fixing bolt.

OK YES



62

Sr.

No. Description

Std

Parameters

POH

(18 Months)

41.9 Check for any damage or abnormality on brake yoke

assembly.

OK YES

41.10 100% replacement of all type of bushes. Done YES

41.11 Replacement of pins on condition basis. Done YES

41.12 100% replacement of pins. Done 2nd

POH

42.0 DASHPOT

42.1 Check for oil leakage. OK YES

42.2 Check the oil level with dip stick and top up if

necessary (97mm). Record quantity of oil fill up in Dash pot.

OK YES

42.3 Check for any breakages of dashpot spring and

dashpot top covers.

OK YES

42.4 Cleaning and lubrication of Dash pot springs. OK YES

42.5 100% replacement of rubber packing. Done YES

42.6 Check dashpot guide bush and replace if required. Done YES

43.0 AIR SUSPENSION

43.1 Check the foundation allen bolts intactness. OK YES

43.2 Check for any cracks, dent marks, leakages, and

hitting marks on air balloon.

OK YES

43.3 Check the foundations and fitment of vertical dampers.

If damper not working replace it.

OK YES

43.4 Check the leveling valve assembly for any leakage,

replace if required.

OK YES

43.5 Check the adjusting lever rods and adjust the

clearances if found abnormal.

OK YES

43.6 Adjust the Installation lever in horizontal position. OK YES

43.7 Check all the cocks provided for air springs are

working if not replace them.

Done YES

43.8 Check for all the air spring cocks are in open position. OK YES

43.9 Drain all the cocks provided in air spring tank. OK YES

43.10 Check all the pipes, couplings for any leakage and

attend it.

Done YES

43.11 Check for any rubbing/ abnormality on the flexible

pipes provided in air spring and replace them as required.

OK YES

43.12 100% replacement of flexible hoses. Done 2nd

POH

43.13 Check the function of duplex check valve by operating

leveling valve of same bolster alternately.

OK YES



63

Sr.

No. Description

Std

Parameters

POH

(18 Months)

43.14 Overhaul all control valves, leveling valve, duplex

check valve.

OK YES

43.15 Overhaul air springs, retest & refit. Done YES

43.16 Replace the CDC filter element. Done YES

44.0 SHOCK-ABSORBERS

44.1 Replacement of oil, rubber kit and load testing of

vertical and lateral shock absorber.

Done YES

44.2 100% replacement of all the shock absorber. Done 4th POH

45.0 WHEELS AND AXLES

45.1 Re-profiling of Wheels. OK YES

45.2 Overhauling of axle box and attention to roller

bearing.

Done YES

45.3 Ultrasonic testing of Axle. Done YES

45.4 Perform magna flux test on each wheel with the help

of magna flux test magnet.

Done YES

45.5 Measure the wheel distance with the help of wheel

distance gauge.

Done YES

46.0 DRAW & SHACKU COUPLER

46.1 Check draw bar and allen key bolts. OK YES

46.2 Check Articulation bearing. Replace if required. OK YES

46.3 Replace Fiber bush required if. OK YES

46.4 Greasing of articulation bearing. OK YES

46.5 Overhaul as per OEM manual. Done YES

46.6 Screw coupling : Check and ensure sound fixation and

lubricate oil.

Done YES

46.7 Ensure intactness of fasteners. OK YES

47.0 FURNISHING ITEMS

47.1 Replacement of lookout glass at motormen side on

condition basis.

Done YES

47.2 Check operation (open/close/locking) of D/cab and

passenger area doors and replace door roller if found

defective.

OK YES

47.3 Attend doors for stopper, tower bolts, latches, handles. OK YES

47.4 Replacement of defective D/cab and passenger area

windows locks, springs, Rubber Gasket, safety mesh.

Done YES

47.5 Replacement of worn out/ broken chequred sheets. Done YES

47.6 Provide missing glass and louver shutter including OK YES



64

Sr.

No. Description

Std

Parameters

POH

(18 Months)

complete window frame.

47.7 Provide missing notice plates. OK YES

47.8 Provide ACP handles, ACP ropes, ACP Springs, Rods,

cover etc.

OK YES

47.9 Check the condition of trough floor OK YES

47.10 Check for any abnormality in handicap compartment,

luggage compartments.

OK YES

47.11 Dismantle, attend and change the cover of seat and

back rest.

OK YES

47.12 Ensure functioning of windows & doors. Done YES

47.13 Replace missing Grab Handles and ensure proper

welding of grab handles in door-ways.

Done YES

47.14 Ensure functioning of D-Cab window glass. Done YES

47.15 Passenger door and D-cab door and rubber buffing

profile to be replaced on condition basis.

OK YES

47.16 Check luggage compartment partition for missing of

SS sheet securing patti, if found missing to be attend.

OK YES

47.17 Replacement of defective lookout glass curtains. Done YES

47.18 Motor coach HT compartment defective locks to be

replaced.

OK YES

47.19 Proper securing of hatch door to be ensured. OK YES

47.20 Check for Roof corrosion, Paint corroded. OK YES

47.21 Replace Ist class seat cushion/ driver seats. OK 4th POH

47.22 Special attention in DTC, HT compartment , End wall

& AHU to prevent the ingress of water in rainy

season.

Done YES

47.23 Ensure healthiness of Locks / tower bolt provided on

coach End wall panel doors.

Done YES

47.24 Ensure proper locking of each & every door viz E-

Cabinet of D/cab & MC, Various cabinet door in HTC.

OK YES

47.25 Roof painting OK YES

47.26 Complete Repainting OK 4th POH

48.0 FINAL TESTING

A Pneumatic Testing

48.1 Switch on DCS key and observe on MMI.

48.2 Check application of holding brakes in all coaches.

a) DCS key "ON" position 0.8 Kg/cm2 YES



65

Sr.

No. Description

Std

Parameters

POH

(18 Months)

b) DCS key "OFF" position 1.2 Kg/cm2 YES

48.3 Check BP pressure charging time from both cabs 0 to

4.9 kg/cm2.

90-100 Sec YES

48.4 Check MR and BP drop test in 10 minutes. not more

than 1.0kg/cm

2

YES

48.5 Ensure MR and BP pipe pressure continuity. OK YES


a) Application Timing 4-6sec YES

b) Release Timing 4-6 sec YES


a) Application Timing 6-10 Sec YES

b) Release Timing <20 Sec YES

48.8 Emergency brake By Power Brake Controller

a) Application Timing 4-6sec YES

b) Release Timing 4-6 sec YES

48.9 Emergency brake By Brake Controller

a) Application Timing 4-6 Sec YES

b) Release Timing <20 Sec YES

48.10 Check working of Brake Controller at all positions and

ensure No leakage in release and auto lap position from Brake Controller.

Ok YES

48.11 Check each coach Brake Cylinders for Leakage. OK YES

48.12 Ensure proper working of Duplex Pressure Gauge, BC

Gauge, Parking Brake and Guard's Gauge.

OK YES

48.13 Ensure Parking Brake application & release. OK YES

48.14 Ensure Parking Brake gauge shows 0 pressure in


OK YES

48.15 Ensure the working of Parking Brake Push button. OK YES

48.16 Ensure No EP unit should have air leakage in both

release and applied condition.

OK YES

48.17 Ensure no EP Unit should be Hunting. OK YES

48.18 Ensure the provision of safety valve in all brake units. OK YES

48.19 Ensure the healthiness of Brake Units Safety Valves

by applying Auto Brake.

OK YES

48.20 Check and ensure Brake Cylinder Pressure of all

coaches should not be more than specified limit.

1.2 kg/cm2-

DTC/TC

1.6kg/cm2-

YES



66

Sr.

No. Description

Std

Parameters

POH

(18 Months)

MC

48.21 Ensure functioning of Emergency Valve by keeping

PBC on EB position.

OK YES

48.22 Ensure effective functioning of Guards Emergency

Brake.

OK YES

48.23 Check the function of Auto Drain Valve. YES

48.24 Check and ensure no air leakage in pipe line,

couplings & hoses pipes.

OK YES

48.25 Check rubbing of hose pipes and shifting of end

nipples.

OK YES

48.26 Check & ensure that clamping arrangements of pipes

is as per RDSO Drg.

OK YES

48.27 Check and ensure Smooth Operation of each coach

MR& BP Cocks.

OK YES

48.28 Ensure smooth operation of Horn Foot Valve. OK YES

48.29 Check the working of Safety valve by applying of auto

brakes.

should be

blow

YES

48.30 Ensure the working of Air Dryers and note their

Tower Change Over Cycle Time.

120sec YES

48.31 Check working of AWS Feed Cut Off Valve and

Exhaust Valve.

OK YES

48.32 Check and ensure smooth operation of AWS Cocks. OK YES

48.33 Check working of both Cab Wipers and ensure wiping

action of wiper blade.

OK YES

48.34 Check Cut in & Cut Out Setting of Auxiliary

Compressor.

6.3 kg/cm2-

5.3kg/cm2

YES

48.35 Check and ensure that there is no Air Leakage from

the Panto-magnet valve.

OK YES

48.36 Check the healthiness of all Coaches Air Spring

Suspension System & Leveling Valve.

OK YES

48.37 Check Cut In & Cut Out setting of Main Compressor. Cut in - 7.0

kg/cm2

Cut out -8.0

kg/cm2

YES

48.38 Ensure availability of Fire Extinguisher in all Motor

coaches.

OK YES

48.39 Ensure availability of Short Circuit Clips, Wooden

Wedge, Fire Extinguisher, ACP Bamboo etc. in DTC.

OK YES

49.0 ELECTRICAL TESTING



67

Sr.

No. Description

Std

Parameters

POH

(18 Months)

49.1 Keep MMI in maintenance mode. OK YES

49.2 Check on MMI that all coaches are set. OK YES

49.3 Check the healthiness of each and every function

physically which are displayed on various screens

(Top level, Unit Level, Drive/Brake, Energy, Fault logged, V > 0 & V = 0) of MMI.

OK YES

49.4 Check for any Error Message on the screen. OK YES

49.5 Check CB set / trip on MMI. OK YES

49.6 Check Panto Raising/Lowering timing on MMI. 6-10 Sec YES

49.7 Check working of Fan, Light and Ventilation (both

50% and 100%)

OK YES

49.8 Check changeover on MMI for 415V AC, 110V AC,

110V DC by operating Basic Unit Isolating Switch.

OK YES

49.9 Check Healthiness of various Lamp Indication by

Pushing Test Push Button.

OK YES

49.10 Check working of Head Light, Auxiliary Head Light,

Flasher, Tail Light and Blinker Lights on various

positions

OK YES

49.11 Check working of Signal bell, Emergency bells and

their indication.

OK YES

49.12 Check for Healthiness of Head-codes. OK YES

49.13 Check working of PA/PIS & TMS system.

i) Cab to Cab (PA & TMS)

ii) Cab to Passenger (PA)

OK YES

49.14 Check operation of " BA Reset " switch OK YES

49.15 Check working of " Emy OFF Loop Push Button " OK YES

49.16 Check the function of all Isolating Switches provided

on E-Cabinet.

OK YES

49.17 Ensure No isolation of Rotary Switches & MCBs in

trip position

OK YES

49.18 Check functionality of Entering Neutral Section Push

Button by observing feed back on SKS 12 & 13

OK YES

49.19 Ensure no any ground fault in 110V AC & 110 DC

circuits.

OK YES

49.20 Observe all Sensors Feed Back Signals in "Observer"

by laptop i.e. COS Timing, BECU speed sensors, BC

pressure, EP Unit pressure transducer, etc

OK YES

49.21 Check working of Passenger Alarm by pulling of ACP

from each coach.

OK YES



68

Sr.

No. Description

Std

Parameters

POH

(18 Months)

49.22 Check and ensure Flasher Indication Provided outside

on all ladies compartment while ACP pulled.

OK YES

49.23 Check working of Dead man valve in normal and

RDM mode .

OK YES

49.24 Run down the Rake in Normal and RDM mode from

DTC as well as from each Motor Coach.

OK YES

49.25 Check working of AWS Speedometer and Speed

recorder.

OK YES

49.26 List of Modification being done. OK YES

49.27 Check MCBs and Replace defective MCBs. OK YES

49.28 Check and ensure the MVB Healthiness as per

SIEMENS protocol.

OK YES

49.29 Testing of rake to be carried out as per the Testing

Protocol at Annexure-I.

OK YES

49.30 Ensure all the Modifications as per check list

(Annexure II).

OK YES

49.31 Down load the events of all motor coach TCU, BCU,

ACU and both CCU and to analyze.

OK YES

50.0 MEASUREMENT OF CLEARANCES OF BOGIE

PARTS AND WHEEL

50.1 Between bogie bolster and top of

bogie frame

TC - 97 mm

MC HT -97 mm NHT -103 mm

YES

50.2 Between bogie bolster and bottom of bogie frame 35 mm - 45

mm

YES

50.3 Between axle box crown and bottom

of bogie frame

TC 42 - 48mm

MC HT - 25-31mm

NHT - 35-41mm

YES

50.4 Buffer height 1030 -1035 mm/ YES

50.5 Size of wheel TC 857-952mm

MC 877-952mm

YES

50.6 Distance of wheels on axle 1600 mm -2/+1 YES

50.7 Height of cattle guard from rail level 150 to 200 mm YES

50.8 Clearance between bolster and

transom liner. Not more than 3mm YES

50.9 Measure bogie frame height 688 ± 5 mm YES

50.10 Measure sole bar bottom height 915mm YES



69

12.10 STORAGE REGULATIONS FOR RUBBER-METAL COMPONENTS

DIN 7716 must be observed when rubber-metal components are stored. DIN 7716 contains the

following key statements which are applicable to rubber-metal components:

Storage area

# The storage area should be cool, dry and adequately ventilated.

# The storage area must be protected from the weather.

Temperature

# Rubber-metal components should not be stored at temperatures below –10 °C or above

+25 °C.

# The storage area temperature may exceed these upper and lower limits for brief periods

only.

Humidity

# The components should not be stored in damp rooms.

# Care should be taken to ensure that condensation does not form. The most favorable

conditions are at a relative humidity of less than 65%.

Lighting

# The components should be protected from light, especially from direct sunlight or

strong artificial light with a high proportion of UV.

Oxygen and ozone

# The components should be protected against frequent air changes, especially drafts, by

wrapping them up, storing them in airtight containers or other means.

# As ozone can be particularly destructive, the storage areas must not contain any

equipment or devices which produce ozone, such as electric motors or other devices

which could produce sparks or other electrical discharges.

Chemicals

# Solvents, fuels, lubricants, chemicals, acids, disinfectants and similar substances must

not be stored in the same room.

# The materials of the containers used for packaging and covering consumables must not

contain constituents which could damage the components, e.g. copper or copper-based

alloys, petroleum products, oil or similar.

Film containing plasticizers must not be used for packaging!

# Any protective layers used on the equipment must not have any detrimental effects on

the elastomer or the rubber-metal bond.


Maintenance Manual for AC-DC EMU (Siemens) ANNEXURE - I

1

ANNEXURE-1 REFERENCE DRAWINGS


ANNEXURE - I Maintenance Manual for AC DC EMU (Siemens)

2



3



4



5



6



7



8



9



10



11



12



13



14



15



16



17



18



19



20



21



22



23



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25



26



27



28



29



30



31



32



33



34



35



36



37



38



39



40



41



42



43


Maintenance Manual for AC-DC EMU (Siemens) ANNEXURE - 2

1

ANNEXURE-2 LIST OF MUST CHANGE ITEMS DURING POH OF AC-DC EMU (SIEMENS)

Sr.

No.

Main

equipment

Sr.

No.

Item I

POH

II

POH

III

POH

1. Brake

Equipment

1. Worm drive hose clips for Dust Excluder

(Big) Y

2. Worm drive hose clips for Dust Excluder

(small) Y

3. Set of rubber component for TVSV (M/s

WSF make) Y

4. EP Magnet valve unit (Modified)

assembly (direct acting type) WSF Y

5. Set of rubber for modified PRV SK No.

EMU/MTN/BE/31 Y

6. Set of rubber for triple valve to Drg. no.

TQKA/R-11 Y

7. Kit of rubber components for N1 type

pressure reducing valve for parking brake Y

8. Maintenance kit of leveling valve of

FTIL/ KBIL make Y

9. Maintenance kit of duplex check valve of

FTIL/ KBIL make Y

10. Gasket of centrifugal dust collector Y

11. Overhauling kit for EP unit as per OEM Y

12. Overhauling kit for Brake controller as per

OEM Y

13. ‘O’ ring and spring for foot operated horn

valve Y

14. Diaphragm for horn & overhauling kit Y

15. Overhauling kit for emergency valve

(Dead man’s valve) Y

16. Piston packing for duplex check valve of

air drier. Y

17. Packing rubber for release valve Y

18. Rubber kit of solenoid valve of parking

brake Y

19. Air drier replacement kit -- Y

20. Overhauling of Quick release mechanism Y

2. Brake

Cylinder

1. Piston packing ring Y

2. Dust excluder Y

3. Parking brake cylinder rubber kit Y


ANNEXURE - 2 Maintenance Manual for AC DC EMU (Siemens)

2

Sr.

No.

Main

equipment

Sr.

No.

Item I

POH

II

POH

III

POH

3. TCU

1. Replacement of cooling fans bearings/

overhauling Y

2. Replacement of TCU Buffer Batteries Y

3. Replacement of TCU cabinet cover gasket & air

filters Y

4. MMI

1. Replacement of tail tell lamp Y

2. Replacement of CCFL & cooling fan (2nd

POH) Y

3. Replacement of all switches (soft keys) of MMI Y

5. ACU

1. Replace the drying agents provided inside the

ACU compartment Y

2 Replace the bearings of cooling fans Y

3 Replace the power module fans & foundation Y

4 Replace the internal fans of the modules 2. Y

5 ACU cabinet cover gasket Y

6 Replacement of Air filters Y

7 Replacement of all fuses Y

6.

Driver’s

Cab equipment

1. Actuator & Switching element:

Head light ON-OFF, Aux.-Main & Dim-bright Y

2 Push button & switching element:

Flasher, Blinker, Tail light, coach light 100% Y

3 Fuses of blinker, flasher, tail light, head light,

DC-DC converter Y

4 MC on/off, panto up/ down, entering neutral

section cruise control switch in driving cab Y

5 In motor coach MC on/ off, Panto On/ Off switch

6 Switching element of EMG off, SBI, SBII,

parking brake, audio-visual Y

7 Master

Controller

1 Springs for master controller Y

2 Micro switches Y

3 Elen screw for master controller Y

4 Replacement of key lock Y

8. VCB

1 Overhauling AOH kit Y

2 Overhauling IOH kit Y

3 Overhauling POH kit Y

4. Rubber Hose pipe Y



3

Sr.

No.

Main

equipment

Sr.

No.

Item I POH

II

POH

III

POH

9. AHU 1 Replacement of bearing Y

2 Replacement of air filters Y

10. Battery 1. Replace with new one Y

2. Replacement of battery fuse Y

11. Others

1 Replacement of all drivers desk, shunting desk,

BECU, E-cabinet, doors, rubber gasket Y

2 Replacement of all under-gear, bogie to body

shunts/cables Y

3 Replacement of CCU battery Y

4 Replacement of all connector rubber gasket

with cable tie. Y

5 Nut bolt of Hatch door Y

6 Nut bolt of DBR protection cover Y

7 Nut bolt of AHU cover of roof Y

8 Replacement of all hardware of all roof

equipment Y

9 Replacement of all roof equipment cables &

shunts Y

10 Rubber pipe of COS Y

11 COS flexible shunts Y

12. MCB with

Feedback

1 Cab occupation Y

2 Master controller Y

3 CCU supply Y

4 Panto and MC supply Y

5 TCC and TCU supply Y

6 SKS 12 Y

7 SKS 13 Y

8 Emg off, MMI Y

13.

Contactor

with add- on block

1. D-cab 22 K01, 22k02, 22k06, 22k07, 22k10,

43k06,43k07,44k01 Y

2 In motor coach 43 k07, 43k08, 43k01, 43k02 Y

14. Pipes

1 MR hose pipe Y

2 BP hose pipe Y

3 Bogie hose pipe Y

4 Parking brake pipe Y

5 Levelling valve pipe Y



4

Sr.

No.

Main

equipment

Sr.

No.

Description Every

POH

Every

alternate

POH

Every third

POH

15. Traction

Motor

1 Change the gear case oil Y

2 Change the rubber sand-witch O-

Ring & gear case felt

Condition

basis

Condition

basis

Condition

basis

3 Replacement of leather bellows Y

4 Replacement of Air filters Y

5 Rubber sand-witch unit Y

6 TM Hardware Y

16. Main

Compressor

1 Replace the resilient mounts after

the service life of 3 years Y

2 Replacement of suction filters &

oil breather filter Y

3 Valve plates and packing ring for

Aux. compressor Y

4 Overhauling kit alternate POH

for compressor as per OEM Y

5 Overhauling kit every third POH

for compressor as per OEM Y

6 Compressor Air drier pipe Y

7 Compressor oil Y

17 Transformers

1 Replacement the silica gel of the

breather with new and dry one,

silica gel container rubber ring

Y

2 Radiator (Heat Exchanger)

blower motor foundation dampers Y

3 Radiator (Heat Exchanger) to be

replaced after 10 years.

18.

Earth return

brushes

(ERB)

1 Rubber packing between ERB

housing and MSU to be replaced. Y

2 Replacement of ERB

On c

ondit

ion b

asis

Y



5

Sr.

No.

Main

equipment

Sr.

No.

Description Every

POH

Every

alternate

POH

Every

third

POH

19. Panto

(Schunk

make)

1 Rubber kit of pressure regulator throttle

valve and inlet filter Y

2 All flexible shunts Y

3 Steel cable (wire rope) Y

4 Rubber bellow Y

20. Panto

(Stone

India

limited Make)

1 Replacement of all split pins Y

2 Yoke assembly bearing 6302 Y

3 All others bearing (lower frame, middle,

upper articulation, push rod bearings) Y

4 Rubber kit of throttle valve Y

5 All flexible shunts Y



6



7

INDIAN RAILWAYS

CENTRE FOR ADVANCD MAINTENANCE TECHNOLOGY, MAHARAJPUR, GWALIOR, M.P. 474 005

Documents

for AC DC EMU (S - WELCOME TO RDSOrdso.indianrailways.gov.in/works/uploads/File/Maintenance...Chapter 1 Maintenance Manual for AC DC EMU (Siemens) 1.6 UNIT & RAKE FORMATION OF EMU