INPLANT TRAINING ATMATUNGA WORKSHOP(COACH CARE CENTRE,MTN)

MOHAMMED NOOR PATEL 14224 EE-5G

Various types of coaches and their electrical aspects

INTRODUCTION OF INDIAN RAILWAYS LINKE HOFMANN BUSCH (LHB) COACHES ALTERNATOR RECTIFIER CUM REGULATOR UNIT BATTERY AND BATTERT CHARGING TERMINAL POWER SUPPLY IN AC COACHES TECHANICAL DETAILS

CONTENTS

It is one of the world's largest railway networks comprising 115,000 km of track over a route of 65,000 km (40,000 mi) and 7,500 stations.

As of December 2015 it transported over 25 million passengers daily .

INTRODUCTION

LHB COACHES

IV COUPLER

EXT.SUPPLY SOCKET

BATTERIES BATTERY FUSE BOX

AC PACKAGE UNIT FRESH AIR INTAKE EXHAUST

FANS

GENERAL FEATURES OF LHB COACH MICRO-PROCESSOR BASED AC PACKAGE AND PUMP UNIT HIGH OPERATING SPEED(UPTO 180 Km/hr)

ANTI-TELESCOPIC DISC BRAKE SYSTEM WHEEL SET EARTHING DEVICE MODULAR INTERIOR

ALTERNATOR

Connection StarGenerated voltage 97V ACRating 4.5kWNo. Of V grooves 4

The alternator is mounted between two wheels. The V belts are attached in the V grooves on the pulley attached to the shaft and the axis of the wheel.

PERMANENT MAGNET ALTERNATOR

COMPACT SIZE AND WEIGHT (280Kg) REQUIRED LESS MAINTENANCE HIGHER EFFICIENCY (upto 75%) VERY LOW VOLTAGE & CURRENT RIPPLE COMPATIBLE WITH INVERTED & VRLA

RECTIFIER CUM REGULATOR UNIT (RRU)

Speed Range 550 RPM to 2500 RPMVoltage 124VRating 4.5kWFull Load Current 38A

RRU is connected just beside the alternator to rectify the output of the generator.

The RRU has following functions:

1. To rectify the 3-phase AC output of the alternator through DC full wave bridge rectifier.

2. Regulator the voltage generated by the alternator at the set value.

3. Regulating the output current.

The output of the RRU is given to battery box to charge the battery .

In a non AC coaches a battery box consist of 18 cells(6V/120Ah each) ,In AC coaches 2 battery box 56 cells(2V/1100Ah each) used.

BCT is provided for external charging of the batteries at stations or maintenance lines.

Used Battery in train is VRLA (Valve Regulated Lead Acid) types advantages -

1. Topping up with water is not required.2. Periodical checking of specific gravity is not required.

Battery and Battery Charging Terminals: -

110 V , 70 Ah , VRLA BATTERY MAIN FEATURES CONSTRUCTIONAL FEATURES • PURE LEAD -TIN PLATE ( THIN ) • 12 VOLTS BATTERY MODULE • CAN BE MOUNTED IN ANY ORIENTATION PERFORMANCE FEATURES• WIDE TEMPERATURE RANGE : -40 Deg.C to +55 Degree C • 8+ YEARS FLOAT LIFE @ 25 Degree C • HIGH DISCHARGE RATE @ 25Degree C• RAPID RECHARGE • DEEP DISCHARGE RECOVERY

110V,70AH VRLA LIGHT WEIGHT BATTERIES

9 MODULES OF 12 VOLTS EACHTOTAL WEIGHT 235 Kgs

Rotary Junction Box is provided inside the coaches.

It is used to arrange and control the power supply to various circuit of the

coaches (e.g. light, fan) with the help of rotary switches and HRC fuses.

4 Rotary switches are connected in Rotary Junction Box:

1. The first switch is used to supply 70% light load in coach.

2. The second switch is used to supply 30% light load in coach.

3. . The third switch is used to supply fan load in coach.

4. The fourth switch is known as EFT switch.

ROTARY JUNCTION BOX

It is provided at the both end of the coach to feed the additional

supply to the adjacent coach in case of emergency.

Supply from the healthy coach may be extended to him/dark

coach by connecting wire(1.5x2 meter) for supply to the

positive and negative terminals of the EFT.

Emergency Feed Terminals (EFT)

AC COACH

Each coach is equipped with two compact roof-mounted air-conditioning units

Cooling capacity of approximately 2x22.5 KW which are controlled by a microprocessor.

The operating voltage of the unit is 3 phase, 415 V, 50 Hz. Each unit has 2 refrigerant circuits with compressors,

condensers with Copper pipes and Aluminum fins, evaporators and condenser fans.

ROOF MOUNTED AC PACKAGE UNITCAPACITY

COOLING - 22.5KW ( 6.4 TON ) HEATING - 6.1KW

•POWER INPUT - 17KVA•OPERATING VOLTAGE - 3 PHASE,415V,50HZ•WEIGHT - 630KG

SALIENT FEATURES•NTC TYPE TEMP. SENSOR.• MICRO-PROCESSOR CONTROL . •HUMIDITY CONTROL

ROOF MOUNTED AC PACKAGE UNIT

CONDENSOR FANS AIR INTAKE FOR THE CONDENSOR FANS

400 AMPS INTERVEHICLE COUPLER

60 KVA TRANSFORMER WITH EPOXY ENCAPSULATION

TERMINAL BOARD

PERFORATED SS HOUSING

MOUNTING ARRGT. WITH AVM’S

• TYPE - EPOXY COATED ENCAPSULATED , WATER PROOF

WINDING

• RATING- 3ø , 50Hz , 60KVA, 750/415V

• NATURAL AIR COOLED

• WEIGHT - 335KG ( Max.)

60 KVA TRANSFORMER FEATURES

CONCLUSION

Thank You