NXAIR BA v2 EN - Siemens · † Bus sectionalizer † busbar connection panel † Contactor panel 6.1 Circuit-breaker panel The circuit-breaker panel is the basic panel type of NXAIR

Medium-Voltage SwitchgearCircuit-Breaker Switchgear Type NXAIR: Factory-Assembled, Type-Tested and Metal-

Enclosed Switchgear for Indoor Installation, Air-Insulated

Loss of Service Continuity Category: LSC 2B (Metal-Clad)

Partition Class PM (Metallic Partition)

Internal Arc Classification: IAC A FLR, ISC = 31.5 kA, t = 1s Arc Duration

Medium-Voltage

Switchgear

OPERATING

INSTRUCTIONS

Order No.: 110-0134.9

8BX3300-0LA00-0AB1

Revision: 02

Issue: 31.03.2010

2 Revision 02 * OPERATING INSTRUCTIONS NXAIR * 110-0134.9 8BX3300-0LA00-0AB1

About these Instructions

These instructions do not purport to cover all details or

variations in equipment, nor to provide for every possible

contingency to be met in connection with operation.

For details about technical design and equipment like

e.g. technical data, secondary equipment, circuit

diagrams, please refer to the order documents.

The switchgear is subject to continuous technical

development within the scope of technical progress. If

not stated otherwise on the individual pages of these

instructions, we reserve the right to modify the specified

values and drawings. All dimensions are given in mm.

For further details, e.g. about additional equipment,

please refer to catalog HA 25.71.

Should further information be desired or should

particular problems arise which are not covered

sufficiently by these instructions, the matter should be

referred to the competent Siemens department.

The contents of this instruction manual shall not become

part of or modify any prior or existing agreement,

commitment or relationship. The Sales Contract

contains the entire obligations of Siemens. The warranty

contained in the contract between the parties is the sole

warranty of Siemens. Any statements contained herein

do not create new warranties or modify the existing

warranty.

110-0134.9 8BX3300-0LA00-0AB1 * OPERATING INSTRUCTIONS NXAIR * Revision 02 3

Contents

Safety instructions............................................................................4

1 Signal terms and definitions................................ 4

2 General instructions ............................................ 4

3 Due application.................................................... 5

4 Qualified personnel ............................................. 5

Description.........................................................................................6

5 Features .............................................................. 6

6 Panel types.......................................................... 7

6.1 Circuit-breaker panel ........................................... 7

6.2 Disconnecting panel............................................ 8

6.3 Metering panel .................................................... 8

6.4 Bus sectionalizer ................................................. 8

6.5 Contactor panel ................................................... 9

7 Panel design.......................................................10

8 Interlocks............................................................12

9 Accessories........................................................13

10 Technical data.....................................................14

10.1 Complete switchgear .........................................14

10.2 Operating conditions ..........................................17

10.3 Vacuum circuit-breaker type 3AE .......................17

10.4 Contactor type 3TL6 ..........................................18

10.5 Operating instructions for circuit-breaker

type 3AE and contactor type 3TL6.....................18

11 Service information ........................................... 20

11.1 Maintenance ..................................................... 20

11.2 Visual inspection ............................................... 21

11.3 Preventive maintenance .................................... 22

11.4 Switchgear extension........................................ 24

11.5 Spare part orders............................................... 24

11.6 Replacement of panels and components.......... 25

11.7 Disposal............................................................. 25

Operation NXAIR.............................................................................26

12 Safety instructions............................................. 26

13 Panel operation ................................................. 27

13.1 Control elements at the front side of

the panel ........................................................... 27

13.2 Operating tools.................................................. 29

13.3 Opening and closing the high-voltage door....... 32

13.4 Racking the withdrawable circuit-breaker to

service position..................................................36

13.5 Racking the withdrawable circuit-breaker to test

position ..............................................................40

13.6 Racking the withdrawable contactor to service

position ..............................................................44

13.7 Racking the withdrawable contactor to test

position ..............................................................47

13.8 Closing the circuit-breaker .................................49

13.9 Opening the circuit-breaker................................51

13.10 Charging the spring manually ............................53

13.11 Closing or opening the contactor.......................55

13.12 Feeder earthing..................................................56

13.13 Feeder de-earthing.............................................59

13.14 Busbar earthing..................................................61

13.15 Busbar de-earthing.............................................64

13.16 Access to connection compartment..................67

13.17 Taking the withdrawable circuit-breaker,

disconnector link and/or withdrawable

metering unit out of the panel ........................... 71

13.18 Inserting the withdrawable circuit-breaker

and/or disconnector link in a panel.....................75

13.19 Taking the withdrawable contactor out of the

panel ..................................................................81

13.20 Inserting the withdrawable contactor in

the panel ............................................................83

13.21 Emergency operation of the feeder earthing

switch without the withdrawable circuit-breaker

inserted in the panel ..........................................87

13.22 Verification of safe isolation from supply ...........88

13.23 Connecting earthing and short-circuit facility .....91

13.24 Manual operation of shutters in circuit-breaker and

disconnecting panels .........................................92

13.25 Manual operation of shutters in the contactor

panel ..................................................................96

13.26 Application of HV HRC fuse-links..................... 101

13.27 Normal current of the HV HRC fuse-links ........ 105

13.28 Motor starting currents.................................... 106

13.29 Coordinating the components of the motor

circuit ............................................................... 107

13.30 Key-operated interlocking with Ronis® locks... 108

14 Trouble shooting .............................................. 112

Index .............................................................................................113

Safety instructions


Safety instructions

1 Signal terms and definitions

Symbols used Operation symbol: Identifies an operation. Asks the operator to perform an

operation.

r Result symbol: Identifies the result of an operation.

2 General instructions

Independently of the safety instructions given in these operating instructions, the local

laws, ordinances, guidelines and standards for operation of electrical equipment as well

as for labor, health and environmental protection apply.

Any kind of modification on the product or alteration of the product must be coordinated

with the manufacturer in advance, as uncoordinated modifications or alterations can

cause the expiration of warranty claims, cause danger to life, limb and other legally

protected interests, and the fulfillment of the type tests (according to IEC 62271-200)

may not be guaranteed anymore.

The edition of the standard is only mentioned in the test report applicable at the time of

switchgear manufacture.

Five Safety Rules ofElectrical Engineering

The Five Safety Rules of Electrical Engineering must generally be observed during

operation of the products and components described in these operating instructions:

• Isolate.

• Secure against reclosing.

• Verify safe isolation from supply.

• Earth and short-circuit.

• Cover or barrier adjacent live parts.

DANGER!

as used in these instructions, this means that personal injuries can occur if the relevant

precautionary measures are not taken.

Observe the safety instructions.

ATTENTION!

as used in these instructions, this means that damage to property or environment can

occur if the relevant precautionary measures are not taken.

Observe the safety instructions.

NOTE!

as used in these instructions, this points at facilitations of work, particularities for

operation or possible maloperation.

Observe the notes.


Safety instructions

3 Due application

The switchgear corresponds to the relevant laws, prescriptions and standards applicable

at the time of delivery. If correctly used, they provide a high degree of safety by means

of logical mechanical interlocks and shockproof metal enclosure of live parts.

4 Qualified personnel

Qualified personnel in accordance with these instructions are persons who are familiar

with maintenance and operation of the product and have appropriate qualifications for

their work.

Furthermore, qualified personnel must have the following training and instruction or

authorization:

• Training and instruction or authorization to switch on, switch off, earth and identify

power circuits and equipment / systems as per the relevant safety standards

• Training and instruction regarding the applicable specifications for the prevention of

accidents and the care and use of appropriate safety equipment

• Training in first aid and behavior in the event of possible accidents

DANGER!

The perfect and safe operation of this switchgear is conditional on:

Observance of operating and installation instructions.

Qualified personnel.

Proper transportation and correct storage of the switchgear.

Correct installation and commissioning.

Diligent operation and maintenance.

Observance of the instructions applicable at site for installation, operation and

safety.

Description


Description

5 Features

The withdrawable circuit-breaker and contactor switchgear types NXAIR have the

following features:

• Factory-assembled, type-tested, metal-enclosed and metal-clad switchgear for indoor

installation according to IEC 62271-200 / VDE 0671-200

• Loss of service continuity category: LSC 2B (metal-clad)

• Partition class PM (metallic partition)

• Internal arc classification: IAC A FLR, ISC ≤ 31.5 kA, t = 1s arc duration

• All switching operations can be carried out at the panel front with the high-voltage door

closed

• Standard degree of protection IP3XD for the metal enclosure according to IEC 60529/

VDE 0470 Part 1

• Metallic, positively driven shutters protect against accidental contact with live parts

inside the panel

• Logical interlocks between actuation, circuit-breaker, disconnecting function and

earthing switch operating mechanism prevent maloperation

• Earthing of feeders by means of earthing switches with short-circuit making capacity

• Mechanical position indicators for the withdrawable part and the earthing switch

integrated in the mimic diagram at the panel front

Further information to design features and design options is given in catalog HA 25.71.

Fig. 1: Front view of circuit-breaker panel Fig. 2: Front view of contactor panel


Description

6 Panel types

The withdrawable circuit-breaker switchgear NXAIR consists of various panel types

which can be freely combined according to the requirements.

The following panel types are available:

• Circuit-breaker panel

• Disconnecting panel

• Metering panel

• Bus sectionalizer

• busbar connection panel

• Contactor panel

6.1 Circuit-breaker panel

The circuit-breaker panel is the basic panel type of NXAIR. The circuit-breaker panel can

fulfil the function "incoming feeder" or "outgoing feeder". It can carry or switch all rated

normal currents of the busbar and the feeders as well as the short-circuit currents

quoted on the respective rating plates.

Basic components • Busbars

• Withdrawable circuit-breaker

• Mechanically coupling low-voltage plug connector between the withdrawable part and

the panel

• Panel connection for cables or bars

Additional components • Current transformers

• Fixed-mounted voltage transformers in cable compartment and busbar compartment

• Voltage transformers on withdrawable part, disconnectable

• Earthing switch with short-circuit making capacity in cable compartment and busbar

compartment

• Surge arresters at the cable connection

• Surge limiters at the cable connection

• Insulated busbar system

• Busbar transverse partition

• Sockets for capacitive voltage detection

Description


6.2 Disconnecting panel

The disconnecting panel is an additional panel to the basic NXAIR panel type. The

disconnecting panel carries electrical power. It cannot switch electrical power. The

disconnector link is therefore protected by a padlock against arbitrary movement

(standard version).


• Withdrawable disconnector link


the panel

• Panel connection for cables or bars

Additional components • Current transformers


• Earthing switch with short-circuit making capacity in cable compartment and busbar

compartment

• Surge arresters at the cable connection

• Surge limiters at the cable connection




6.3 Metering panel

The metering panel is used to measure the voltage of the busbars. To separate the

voltage transformer set, the metering panel is equipped with a withdrawable part.


• Withdrawable metering unit


the panel

• Fixed-mounted voltage transformer set on withdrawable part with three single-pole

voltage transformers, optionally with or without fuses

6.4 Bus sectionalizer

A bus sectionalizer consists of two NXAIR panels: A circuit-breaker panel and a

disconnecting panel, or a circuit-breaker panel and a bus riser panel.


• Withdrawable circuit-breaker

• Disconnector link

• Mechanically coupling low-voltage plug connector between the withdrawable parts

and the panels

• Connection bars in connection compartment at the bottom


Description

Additional components • One or two current transformer sets

• One or two voltage transformer sets




• Busbar earthing switch


• Voltage transformers on withdrawable part, disconnectable

6.5 Contactor panel

The contactor panel is an additional panel to the basic NXAIR panel type. The contactor

panel is especially suitable for operational switching of loads with a high switching rate.

Short-circuit and overload protection is taken over by HV HRC fuse-links.


• Withdrawable contactor with HV HRC fuse-links

• Automatically coupling low-voltage plug connector between the withdrawable part and

the panel

• Panel connection for cables

Additional components • Fused control transformer

• Current transformers

• Surge limiters

Description


7 Panel design

Basic design • Enclosure made of galvanized sheet-steel

• Front doors and lateral switchgear end walls are powder-coated with resistant epoxy

resin material

• Individual modular compartments in solid-wall design

• Modular compartments bolted together

Fig. 3: Sectional view of the circuit-breaker panel design

a Metallic shutters for high-voltage contacts

s Low-voltage connection, plug-in type

d Operating and interlocking unit for withdrawable circuit-breaker,

disconnector link and withdrawable metering unit

f Vacuum interrupters

g Operating and interlocking unit for racking the withdrawable part

and for earthing

h Make-proof earthing switch

j Cable connection for up to 4 cables per phase

k Voltage transformer

l Contact system

; Block-type current transformer

A Bushing-type insulator

S Busbars

D Pressure relief duct

A Switching device compartment

B Busbar compartment

C Connection compartment

D Withdrawable circuit-breaker

E Low-voltage compartment


Description

Further information to design features and design options is given in catalog HA 25.71.

Fig. 4: Sectional view of the contactor panel design

a Metallic shutters for high-voltage contacts

s Contact system

d HV HRC fuse-links

f Vacuum contactor

g Operating and interlocking unit for racking the

withdrawable part and for earthing

h Cable connection for up to 2 cables per phase

j Make-proof earthing switch

k Block-type current transformer

l Busbars

; Pressure relief duct

A Switching device compartment

B Busbar compartment

C Connection compartment

D Withdrawable contactor

E Low-voltage compartment

Description


8 Interlocks

Mechanical interlocks

Additional electromagnetic interlocks (optional)

Action Internal preconditions of the withdrawable part

Inserting the withdrawable part in the panel Withdrawable part in test position on service truck

Pulling the withdrawable part out of the panel None

Racking the withdrawable part to service

position

Withdrawable part inserted and interlocked

Low-voltage connector plugged in

High-voltage door closed

Circuit-breaker in OPEN position / contactor in OPEN position

Feeder earthing switch in OPEN position

Plug low-voltage connector in Consistent coding between connector and withdrawable part fulfilled *

Racking the withdrawable part to test position Circuit-breaker in OPEN position / contactor in OPEN position

Closing the circuit-breaker / closing the

contactor

Withdrawable part in interlocked end position (test or service position)

Opening the circuit-breaker / opening the

contactor

None

Closing the contactor HV HRC fuse-links not tripped

Operating the feeder earthing switch Withdrawable part in interlocked test position

Operating the busbar earthing switch None (see note below)

Opening the high-voltage door Withdrawable part in test position

* Not feasible with withdrawable vacuum contactor

Action Addtional preconditions

Racking the withdrawable part General or external release

Operating the feeder earthing switch General or external release *

Operating the busbar earthing switch General or external release

* Not feasible with withdrawable vacuum contactor

NOTE!

The busbar earthing switch is secured against unintentional operation by means of a

padlock or an electromagnetic interlock.

Panel versions with electromagnetic interlocking are identified on the high-voltage

door with labels for interlocking the disconnecting function and/or the earthing

switch.


Description

Additional padlock interlock (optional)

Additional interlock with lock systems (optional) Lock system type Ronis®

9 Accessories

The switchgear is always supplied with the following standard accessories:

• Racking crank with protective shield for moving the withdrawable part.

• Push rod for closing / opening the circuit-breaker mechanically

• Hand crank with freewheel for charging the circuit-breaker manually

• Operating lever for feeder and busbar earthing switch

• Double-bit key for low-voltage door

• Double-bit key for withdrawable part

• Service truck for withdrawable parts

• Installation and operating instructions

The following accessories are optionally available:

• Slip-on levers for shutter operation (set for left and right side)

• Additional service truck for withdrawable parts

• Wall-mounting holder for accessories

• Earthing accessories for 31.5 kA/1 s

• Emergency tool adapter for feeder earthing switch without withdrawable part inserted

in the panel

• Plug-in voltage indicator IEC 61243-5/VDE 0682, Part 415, LRM system for capacitive

voltage tap

• Test unit for voltage indicator

• Touch-up kit for minor paint damage

• Touch-up paint, 1 kg tin

• Coupling unit, 64-pole - 3 m long connection between withdrawable part and panel for

function testing

• Tin of Longterm 2 grease (used on: contact system, earthing switch knifes)

• Shell Vaseline 8422 DAB 8 (used on: busbar connection and earth connection)

• Grease Isoflex TOPAS L32 (used on: shutter rods , withdrawable unit guide)

• Test equipment for pressure switch

• Phase comparison test units


Racking the withdrawable part Key for padlock

Operating the feeder earthing switch Key for padlock

Operating the busbar earthing switch Key for padlock

Opening the high-voltage door Key for padlock


Racking the withdrawable part to service

position

Access to actuating openings only after opening the Ronis® lock

Switch feeder earthing switch to CLOSED

position

Access to actuating openings only after opening the Ronis® lock

Switch feeder earthing switch to OPEN position Access to actuating openings only after opening the Ronis® lock

Description


10 Technical data

10.1 Complete switchgear

Electrical data (maximum values)

Dimensions per panelin mm

Electrical data

Rated voltage Ur [kV] 12 17.5

Rated short-duration power-frequency withstand voltage Ud [kV] 28 1) 38

Rated lightning impulse withstand voltage Up [kV] 75 2) 95

Rated frequency fr [Hz] 50/60

Rated short-circuit breaking current Isc [kA] 31.5

Rated short-circuit making current Ima [kA] 82

Rated peak withstand current Ip [kA] 82

Rated short-time withstand current Ik [kA] 31.5

Rated duration of short-circuit tk [s] 1-3

Rated normal current of the busbar Ir [A] 2500

Rated normal current of feeders Ir [A] 2500

Rated normal current for bus sectionalizer Ir [A] 2500

Rated normal current of feeders, contactor panel Ir [A] 310 3)

1) 42 kV optional

2) Contactor panel max. 60 kV at 7.2 kV and max. 40 kV across the open interrupter

Contactor panel max. 75 kV at 12 kV and max. 60 kV across the open interrupter

3) Depending on rated current of HV HRC fuse-links

Panel type NXAIR Dimension [mm]

Circuit-breaker panel ≤ 1000 A Width 600

1250 A 800

Disconnecting panel ≤ 1250 A 800

Bus sectionalizer ≤ 1250 A 2 x 800

Bus sectionalizer ≤ 2500 A 2 x 1000 or

1 x 1000 with 1 x 800

Busbar connection panel ≤ 2500 A 800

Contactor panel ≤ 310 A 435

Metering panel 800

Standard Height 2300

With high low-voltage compartment 2350

With natural ventilation 2300

With additional compartment for busbar components 2350

Contactor panel, standard 2300

Contactor panel with high low-voltage compartment 2350

Single busbar Depth 1350

Double busbar, back-to-back arrangement 2850

Contactor panel 1400


Description

Dimensions of theswitchgear room

To install the switchgear, the switchgear room must have certain minimum dimensions.

Please observe the following illustrations.

Pressure relief system Depending on the room height, the pressure relief system of switchgear with evacuation

ducts must be led outside the switchgear building:

NXAIR, single-rowarrangement

Type of protection

Basic prescriptions andstandards

The indoor switchgear complies with the following prescriptions and standards:

Room height

[mm]

Rated voltage

Ur [kV]

Rated short-time withstand current

Ik [kA]

Design with evacuation ducts

to the outside of the building

≥ 2500 to 2800 ≤ 12 ≤ 25 compulsory

≥ 2800 ≤ 12 ≤ 25 optional

≥ 2500 ≤ 12 31.5 compulsory

≥ 2500 17.5 ≤ 31.5 compulsory

Single-row arrangement (plan view) for single-busbar

switchgear

For width (B) and depth (T) of the panel see table

mentioned above.

1) For panel replacement: Control aisle ≥ 1410 mm

2) For cable connection from the rear: ≥ 800 mm

For back-to-back and face-to-face arrangement, the

room dimensions apply accordingly to those for

single-row arrangement.

For back-to-back arrangement, a 1200 mm wide control

aisle is required on the left or on the right of the

switchgear.

Fig. 5: Dimensions of switchgear room, NXAIR

Standard IP3XD

Optional IP4X

Partition in switching device compartment IP2X

IEC/EN standard

Switchgear 62271-1

62271-200

Switching devices Circuit-breakers 62271-100

Contactors 60470

Disconnectors/earthing

switches

62271-102

Voltage detecting systems 61243-5

Insulation 60071-1

Degree of protection 60529

Instrument transformers Current transformers 60044-1

Voltage transformers 60044-2

Installation, erection 61936-1

Description


Electromagneticcompatibility - EMC

The a.m. standards as well as the "EMC Guide for Switchgear"* are applied during

design, manufacture and erection of the switchgear. Installation, connection and

maintenance have to be performed in accordance with the stipulations of the operating

instructions. For operation, the legal stipulations applicable at the place of installation

have to be observed additionally. In this way, the switchgear assemblies of this type

series fulfill the basic protection requirements of the EMC guide.

The switchgear operator / owner must keep the technical documents supplied with the

switchgear throughout the entire service life, and keep them up-to-date in case of

modifications of the switchgear.

* (Dr. Bernd Jäkel, Ansgar Müller; Medium-Voltage Systems - EMC Guide for

Switchgear; A&D ATS SR/PTD M SP)

Rating plates Each panel has a rating plate fixed on the inside of the high-voltage and the low-voltage

door containing the following information:

The block-type current and voltage transformers have their own type plates. A copy is

provided on the inside of the high-voltage door.

IAC classification The data (see item f) describes the internal arc classification of the panel according to

IEC 62271-200. The entries IAC A FLR 25 kA 1 s in the example shown mean:

• IAC: Internal Arc Classification

• A: Type of accessibility A; for authorized personnel only; switchgear in closed electrical

service location; access for expert personnel only.

• F: Internal arc classification for the front side (Front)

• L: Internal arc classification for the lateral sides (Lateral)

• R: Internal arc classification for the rear side (Rear)

• 25 kA: Tested short-circuit current

• 1 s: Test duration

The IAC classification is referred to each panel. The data on the rating plate (see item f)

describes the areas classified for the corresponding panel.

Fig. 6: Fig. 3:Rating plate

a Switchgear type

s Serial number

d Technical data

f Internal arc classification

g Number of operating

instructions for the panel

h Year of manufacture

j Panel number

k Loss of service continuity

category, partition class


Description

10.2 Operating conditions

NXAIR switchgear is designed for normal indoor operating conditions according to IEC

62271-1.

In this respect, the following limit values for the ambient air temperature must be

complied with as a minimum:

The site altitude may be 1000 m above sea level as a maximum.

When NXAIR switchgear is used in regions with high air humidity or considerable

temperature fluctuations, there is risk of condensation. The formation of condensation

should be an exception under normal operating conditions. To prevent condensation,

rusting or other serious consequences, the associated preventive measures must be

taken by installing electrical heating equipment in the switchgear.

The ambient air must not be significantly polluted by dust, smoke, corrosive and/or

flammable gases, vapors or salt.

10.3 Vacuum circuit-breaker type 3AE

The vacuum circuit-breaker type 3AE SION is a 3-pole indoor circuit-breaker for ratings

from 3 kV to 3 kV.

Rating plate A rating plate is provided on the operating mechanism unit of every circuit-breaker type

3AE SION.

Limit value Temperature [ºC]

Maximum value + 40

Minimum value - 5

Maximum value of 24-hour mean + 35

a Rating plate type 3AE SION

Description


10.4 Contactor type 3TL6

The vacuum contactor type 3TL6 is a 3-pole indoor contactor for ratings from 7.2 kV to

12 kV.

Rating plate A rating plate is provided on the operating mechanism unit of every contactor type 3TL6.

10.5 Operating instructions for circuit-breaker type 3AE and contactor type 3TL6

Operating instructions forcircuit-breaker and

contactor

For circuit-breakers type 3AE and contactors type 3TL6, separate operating instructions

are available with detailed instructions and information. The operating instructions are

supplied as standard with every circuit-breaker type 3AE and contactor type 3TL6.

Additional operating instructions in different languages can be ordered at the regional

Siemens representative.

a Rating plate type 3TL6

Fig. 7: Operating instructions for circuit-breaker type 3AE SION

Fig. 8: Operating instructions for contactor type 3TL6


Description

Available operatinginstructions for

circuit-breaker type 3AE

Available operatinginstructions for contactor

type 3TL6

Language Order number of operating instructions

German BA_000000092290001100_0A_001

Polish BA_000000092290001155_0-_001

Russian BA_000000092290001156_0-_001

Italian BA_000000092290001172_0-_001

English BA_000000092290001176_0-_001

French BA_000000092290001177_0-_001

Spanish BA_000000092290001178_0-_001

Portuguese BA_000000092290001179_0-_001

Romanian BA_000000092290001302_0-_001

Language Order number of operating instructions

German-English BA_000000092299527174_0J_001

French-Spanish BA_000000092299527159_0J_001

German-Russian BA_000000092299527512_0J_001

Description


11 Service information

11.1 Maintenance

Maintenance ensures undisturbed and uninterrupted operation of the switchgear.

The maintenance measures are divided into the following fields:

• Visual inspection

• Preventive maintenance

Time schedule formaintenance measures

Besides the recommended maintenance intervals, additional maintenance measures

may be required for operational reasons.

Recommended time schedule for maintenance measures

ATTENTION!

Non-observance of the following instructions can endanger people or damage the

switchgear.

All measures within the scope of maintenance may only be executed by qualified

personnel.

Furthermore, the relevant IEC standards and the local and site-related safety

regulations must be observed.

For questions about maintenance measures, please contact your regional Siemens

representative.

Measure Interval Operational fact

Visual inspection Every year or at the operator's

discretion

Preventive

maintenance

Every 10 years, or depending on

operational facts, or at the operator's

discretion

E.g. after a short-circuit breaking/making operation of a

circuit-breaker and/or an earthing switch when the

permissible number of operating cycles has been

reached


Description

11.2 Visual inspection

The visual inspection is performed every year or at the operator's discretion.

General check for paint damages on all panels of a switchgear assembly in the area

of the front doors, the lateral and the rear termination. If required, repair damages.

General check of the switchgear for dust layers, especially of the absorber units and

ventilation units in the pressure relief duct.

Clean dust layers on the units with customary vacuum cleaners without damaging

the wire frames a or ventilation slots a.

Fig. 9: View from above onto an absorber unit in the pressure relief duct

Fig. 10: View from above onto a ventilation unit in the pressure relief duct

Description


General check for humidity. To do this, open the high-voltage door of the switching

device compartment of every third panel and check the switching device

compartment for humidity or condensation. For instructions to rack a withdrawable

part, see Page 26, "Operation NXAIR".

If there is humidity or condensation inside a switching device compartment,

determine the cause thereof. To do this, do also observe the climatic conditions of

the switchgear room, and arrange for suitable measures such as room ventilation or

room heating.

General check for partial discharge noises. If there are any partial discharge noises,

determine the cause thereof and take adequate countermeasures.

Check whether the accessories are complete (see Page 13, "Accessories").

11.3 Preventive maintenance

Perform visual inspection and carry out the necessary maintenance work according

to the problems determined.

When an earthing switch has performed two short-circuit making operations,

maintenance work has to be done by means of a visual inspection of the earthing

switch blades and the fixed laminated contacts. If there is any visible erosion, the

stressed components must be replaced. To do this, please contact the regional

Siemens representative.

Built-in equipment such as circuit-breakers, voltage transformers, current

transformers, relays, meters, protection equipment, etc. must be serviced and

maintained as specified in the associated operating instructions.

Fig. 11: Exemplary view of a ventilated panel with lateral ventilation slots in the high-voltage door (in other panel designs, the ventilation slots are also provided centrally at the bottom).


Description

Carry out maintenance and servicing at shorter intervals (to be specified by the

owner) if there is a lot of dust, or if the air is extremely humid and/or polluted.

Following the results of the visual inspection (see Page 21, "Visual inspection"),

grease the main contacts at:

• Moving rails

• Fixed contacts of the earthing switch

• Bushings

Fig. 12: Circuit-breaker, disconnecting and metering panel

a Moving rails

s Fixed contacts of earthing switch

d Bushings

Description


Greases to be used

Independently of the regular visual inspection and preventive maintenance,

immediately determine the cause of failures and short circuits, and replace any

damaged components.

11.4 Switchgear extension

The switchgear can be extended at both ends without modification of existing panels.

For switchgear extension, please contact the regional Siemens representative.

11.5 Spare part orders

Information required for spare part orders of single components and devices:

• Type and serial number of the switchgear and the withdrawable part as per rating

plates.

• Precise designation of the device or component, if applicable on the basis of the

information and illustrations in the associated instructions, a drawing, sketch or circuit

diagram.

• Spare parts have to be ordered at the regional Siemens representative.

Fig. 13: Contactor panel

Component Interval Grease

- Main fixed contacts of bushings d

- Fixed contacts of earthing switch s

Shorter intervals (at the

operator's discretion)

Longterm 2

- Moving rails a Isoflex Topas L32


Description

11.6 Replacement of panels and components

Replacement of panels

For replacement of panels, please contact the regional Siemens representative.

Replacement of components

The individual components, such as measuring instruments, current transformers, etc.,

can be replaced. The contact pieces in the bushings are bolted and can be replaced. In

case of wear or changed environmental conditions, the contact pieces can be replaced

from the front without dismantling any conductor bars.

For replacement of components, please contact the regional Siemens representative.

11.7 Disposal

NXAIR switchgear is an environmentally compatible product.

The panels are made of galvanized sheet metal. The doors and switchgear end walls are

powder-coated with resistant epoxy resin material.

The switchgear materials should be recycled as far as possible. The switchgear can be

disposed of in an environmentally compatible manner in compliance with existing

legislation.

The components of the switchgear can be recycled as mixed scrap; however,

dismantling as far as possible into sorted scrap with a residual mixed-scrap portion is the

more environmentally compatible way.

Electronic scrap must be disposed of in accordance with the existing regulations.

The switchgear consists of the following materials:

• Sheet metal, galvanized

• Copper

• Aluminum

• Polycarbonate (PC)

• Cr-Ni steel

• Epoxy resin

• Cast resin

• Fiber-reinforced plastics

• Rubber materials

• Ceramic materials

• Lubricants

• Bolts, washers, nuts, rivets made of steel

As delivered by Siemens, the switchgear does not contain hazardous materials as per

the Hazardous Material Regulations applicable in the Federal Republic of Germany. For

operation in other countries, the locally applicable laws and regulations must be

followed.

For further information, please contact the regional Siemens representative.

Operation NXAIR


Operation NXAIR

12 Safety instructions

DANGER!

High voltage! Danger!

Do not touch live components.

Ensure that the switchgear is only operated by qualified personnel who are familiar

with the operating instructions and observe the warnings.

DANGER!

During operation of electrical equipment and switchgear, parts of this equipment are

under dangerous electrical voltage. Mechanical components may move quickly, even

remotely controlled.

Do not remove covers.

Do not reach into openings.

Do not touch circuit-breaker poles and operating rods.

NOTE!

Perfect and safe operation of the switchgear

The perfect and safe operation of this switchgear is conditional on correct erection

and installation according to the installation instructions.


Operation NXAIR

13 Panel operation

13.1 Control elements at the front side of the panel

Fig. 14: Control elements at the panel front of the circuit-breaker panel

a Door of low-voltage compartment

s Protection device

d Locking device for low-voltage door

f Test sockets for busbar voltage detecting system (type LRM) as

additional equipment

g High-voltage door

h Opening for charging the spring in the circuit-breaker manually

j Door handle for opening the high-voltage door

k Control gate for opening and closing the actuating opening for

racking the switching device

l Actuating opening for racking the switching device

; Actuating opening for inserting the double-bit key to control

racking of the withdrawable part

A Mechanical position indicator for withdrawable part

S Actuating opening for make-proof earthing switch

D Control gate for opening and closing the actuating opening for

operating the earthing switch mechanism

F Mechanical position indicator for earthing switch

G Operations counter for circuit-breaker

H "Closing spring charged" indicator for circuit-breaker

J CLOSED/OPEN indicator of the circuit-breaker

K Actuating opening for opening the circuit-breaker

L Actuating opening for closing the circuit-breaker

Rotary button for opening and closing the actuating opening below

Operation NXAIR


Fig. 15: Control elements at the panel front of the contactor panel

a Door of low-voltage compartment

s Protection device

d Locking device for low-voltage door

f High-voltage door

g Locking device for high-voltage door

h Door handle for opening the high-voltage door

j Control gate for opening and closing the actuating opening for

operating the earthing switch mechanism

k Mechanical position indicator for earthing switch

l Actuating opening for earthing switch

; Actuating opening for racking the switching device

A Control gate for opening and closing the actuating opening for

racking the switching device

S Actuating opening for inserting the double-bit key to control

racking of the withdrawable part

Position indication for withdrawable part and earthing switch

Circuit-breaker, disconnecting and metering panels

Contactor panel

Circuit-breaker CLOSED OPEN

- - -

Earthing switch CLOSED OPEN

-

CLOSED OPEN

Withdrawable part Service position Faulty position Test position

- -

Spring energy store in circuit-breaker CHARGED NOT

CHARGED

- - -


Operation NXAIR

13.2 Operating tools

The following operating tools are supplied as accessories:

Fig. 16: Racking crank with protective shield for moving the withdrawable part.

Fig. 17: Push rod for closing / opening the circuit-breaker mechanically

Fig. 18: Operating lever for operation of the feeder or busbar earthing switch

Fig. 19: Hand crank for manual charging of the spring in the circuit-breaker

Operation NXAIR


Fig. 20: Slip-on lever for opening the shutters in front of the fixed contacts in the switching device compartment (optional).

Fig. 21: Emergency tool adapter to be used exclusively for emergency operation of the feeder earthing switch - without withdrawable part inserted in the panel - in case of electrical failure of the switchgear (optional)

Fig. 22: Double-bit key with a diameter of 3 mm for opening and closing the door of the low-voltage compartment

Fig. 23: Double-bit key with a diameter of 5 mm for releasing and interlocking the withdrawable part


Operation NXAIR

Fig. 24: Service truck to insert and remove a withdrawable circuit-breaker, disconnector link and metering unit

Fig. 25: Service truck to insert and remove the withdrawable contactor

Operation NXAIR


13.3 Opening and closing the high-voltage door

Opening high-voltage door of circuit-breaker panel

Preconditions • Withdrawable part in test position

Procedure Pull door handle upwards and open the door.

Fig. 26: Opening the high-voltage door of the circuit-breaker panel

r High-voltage door is open.

NOTE!

The following instructions for opening and closing the high-voltage door apply to:

Circuit-breaker panels

Disconnecting panels

Metering panels

Contactor panels


Operation NXAIR

Opening the high-voltage door of the contactor panel

Preconditions • Double-bit key available

• Withdrawable part in test position

Procedure Insert double-bit key in door lock and turn 90 ° counter-clockwise.

Pull door handle upwards and open the door.

Fig. 27: Opening the high-voltage door of the contactor panel

r High-voltage door is open.

Operation NXAIR


Closing the high-voltage door of the circuit-breaker panel

Preconditions Either without withdrawable part or:

• Withdrawable part inserted in test position

• Low-voltage connector plugged in

Procedure Pull door handle upwards and close the door.

Push door handle downwards.

Fig. 28: Closing the high-voltage door of the circuit-breaker panel

r High-voltage door is closed.


Operation NXAIR

Closing the high-voltage door of the contactor panel

Preconditions • Double-bit key inserted in door lock.

Either without withdrawable part or:

• Withdrawable part inserted in test position

• Low-voltage connector couples automatically in the panel.

Procedure Pull door handle upwards and close the door.

Push door handle downwards.

Turn double-bit key 90° counter-clockwise and remove it.

Fig. 29: Closing the high-voltage door of the contactor panel

r High-voltage door is closed.

Operation NXAIR


13.4 Racking the withdrawable circuit-breaker to service position

Preconditions for operation • Withdrawable circuit-breaker inserted and locked in the panel

• Low-voltage connector plugged in

• High-voltage door closed

• Circuit-breaker in OPEN position

• Feeder earthing switch in OPEN position

• Racking crank for moving the withdrawable circuit-breaker available

• Double-bit key available

The actuating opening for racking the withdrawable circuit-breaker is located on the

control board of the high-voltage door.

Fig. 30: Actuating opening for racking the withdrawable circuit-breaker (padlock on actuating opening of feeder earthing switch is optional)

ATTENTION!

Please observe:

The instructions in this section also apply to the disconnector link and the

withdrawable metering unit.

ATTENTION!

Withdrawable disconnector links cannot switch electrical power on or off.

Rack withdrawable disconnector links from test position to service position only if

the panel is in de-energized condition. This equally applies to racking from service

position to test position.


Operation NXAIR

Procedure

Open lock (optional).

Push control gate upwards.

ATTENTION!

If there is no auxiliary voltage, both the electrical and the mechanical interlocks are

closed. If the optional interlocks are overridden locally, manual switching operations are

possible despite an existing electrical interlock, and this can cause failures.

Ensure that the intended manual switching operation has been released externally.

ATTENTION!

All interlocks are only released when the withdrawable part is in a stable end position.

Rack the withdrawable circuit-breaker, disconnector link and metering unit

absolutely until end position.

Operation NXAIR


To release access to the withdrawable part, insert the double-bit key and turn 90°

clockwise.

Push the racking crank for moving the withdrawable circuit-breaker onto the

operating shaft, and turn clockwise as far as it will go.

Remove racking crank for moving the withdrawable part.


Operation NXAIR

Turn the double-bit key 90° clockwise to interlock the withdrawable part.

Remove double-bit key.

Close control gate.

Close lock (optional).

r The withdrawable circuit-breaker has been racked from test position to service

position; the position indicator is in CLOSED position (vertical bar)

Operation NXAIR


13.5 Racking the withdrawable circuit-breaker to test position

Preconditions for operation • High-voltage door closed

• Withdrawable part in service position

• Circuit-breaker in OPEN position

• Racking crank for moving the withdrawable circuit-breaker available


Fig. 31: Actuating opening for racking the withdrawable circuit-breaker

ATTENTION!

Please observe:

The instructions in this section also apply to the disconnector link and the

withdrawable metering unit.

ATTENTION!

Withdrawable disconnector links cannot switch electrical power on or off.

Rack withdrawable disconnector links from test position to service position only if

the panel is in de-energized condition. This equally applies to racking from service

position to test position.


Operation NXAIR



ATTENTION!


closed. If the optional interlocks are overridden locally, manual switching operations are

possible despite an existing electrical interlock, and this can cause failures.


ATTENTION!

All interlocks are only released when the withdrawable part is in a stable end position.

Rack the withdrawable circuit-breaker, disconnector link and metering unit

absolutely until end position.

Operation NXAIR



counter-clockwise.

Push the racking crank for moving the withdrawable circuit-breaker onto the

operating shaft, and turn counter-clockwise as far as it will go.



Operation NXAIR

Turn the double-bit key 90° counter-clockwise to interlock the withdrawable part.


Close control gate.


r The withdrawable circuit-breaker has been racked from service position to test

position; the position indicator of the withdrawable part is OPEN (horizontal bar).

Operation NXAIR


13.6 Racking the withdrawable contactor to service position

Preconditions for operation • Withdrawable contactor inserted and locked in the panel


• Contactor in OPEN position

• Feeder earthing switch in OPEN position

• Racking crank for moving the withdrawable contactor available


The actuating opening for racking the withdrawable contactor is located on the control

board of the high-voltage door.

Fig. 32: Actuating opening for racking the withdrawable contactor

Procedure

ATTENTION!


closed. If optional interlocks are overridden locally, it is possible to perform manual

operations despite existing interlocks, and this can cause failures.


ATTENTION!

All interlocks are only released when the withdrawable contactor is in a stable end

position.

Always rack the withdrawable contactor completely up to the end position.


Operation NXAIR




clockwise.

ATTENTION!

If the contactor on the withdrawable part is equipped with a mechanical closing latch,

the contactor will automatically be switched to OPEN position as soon as the double-bit

key is inserted and turned 90° clockwise.

Automatic opening only happens when the contactor on the withdrawable part is in

CLOSED position.

Operation NXAIR


Push the racking crank for moving the withdrawable contactor onto the operating

shaft, and turn clockwise as far as it will go.


Turn the double-bit key 90° clockwise to interlock the withdrawable part.


Close control gate.


r The withdrawable contactor has been racked from test position to service position.


Operation NXAIR

13.7 Racking the withdrawable contactor to test position

Preconditions for operation • Withdrawable contactor inserted and locked in the panel


• Withdrawable part in service position

• Contactor in OPEN position

• Racking crank for moving the withdrawable contactor available


Fig. 33: Actuating opening for racking the withdrawable contactor

ATTENTION!


closed. If optional interlocks are overridden locally, it is possible to perform manual

operations despite existing interlocks, and this can cause failures.


ATTENTION!

All interlocks are only released when the withdrawable contactor is in a stable end

position.

Always rack the withdrawable contactor completely up to the end position.

Operation NXAIR





counter-clockwise.

Push the racking crank for moving the withdrawable part onto the operating shaft,

and turn counter-clockwise as far as it will go.

ATTENTION!

If the contactor on the withdrawable part is equipped with a mechanical closing latch,

the contactor will automatically be switched to OPEN position as soon as the double-bit

key is inserted and turned 90° clockwise.

Automatic opening only happens when the contactor on the withdrawable part is in

CLOSED position.


Operation NXAIR


Turn the double-bit key 90° counter-clockwise to interlock the withdrawable part.


Close control gate.


r The withdrawable part has been racked from service position to test position.

13.8 Closing the circuit-breaker

Manual operation

Preconditions for operation • Withdrawable part in service or test position

• Spring charged

• Push rod available

Fig. 34: Actuating opening for closing the circuit-breaker mechanically

Operation NXAIR


Procedure Turn cover of actuating opening aside using the rotary button located over it.

Insert the push rod through the actuating opening in the door and operate the ON

pushbutton until the switching noise of the circuit-breaker can be heard.

r The position indicator changes from "0" position to "I" position. The operations

counter is increased by 1. The circuit-breaker is closed.

Take push rod out of actuating opening.

Cover of actuating opening closes automatically.


Operation NXAIR

Electrical operation


• Spring charged

• High-voltage door of panel is closed.

• Central or local electrical control.

Procedure

Close circuit-breaker via central or local electrical control.

r The position indicator changes from "0" position to "I" position. The operations

counter is increased by 1. The circuit-breaker is closed.

13.9 Opening the circuit-breaker

Manual operation


• Circuit-breaker in CLOSED position

• Push rod available

Fig. 35: Opening the circuit-breaker mechanically

DANGER!


closed. If the interlocks are overridden, manual switching operations are possible

despite an existing electrical interlock, and this can cause failures.


Operation NXAIR


Procedure Turn cover of actuating opening aside using the rotary button located over it.

Insert the push rod through the actuating opening in the door and operate the OFF

pushbutton until the switching noise of the circuit-breaker can be heard.

r The position indicator changes from position "I" to position "O". The circuit-breaker is

open.

Take push rod out of actuating opening.

Cover of actuating opening closes automatically.

DANGER!


closed. If the optional interlocks are overridden, manual switching operations are

possible despite an existing interlock, and this can cause failures.



Operation NXAIR

Electrical operation

Preconditions for operation • Circuit-breaker in CLOSED position

• Central or local control.

Procedure Open circuit-breaker via central or local electrical control.

r The circuit-breaker position indicator changes from "I" position to "0" position. The

circuit-breaker is open.

13.10 Charging the spring manually

Spring energy storeindicator

When auxiliary voltage is applied, the spring energy store of the circuit-breaker is

charged automatically by plugging the low-voltage connector. The spring energy store

indicator changes from "spring energy store not charged" to "spring energy store

charged".

Fig. 36: Spring energy store indicator "Spring energy store not charged"

Fig. 37: Spring energy store indicator "Spring energy store charged"

If the control voltage fails, the closing spring for operating the circuit-breaker is no longer

charged automatically by the motor. To operate the circuit-breaker in spite of this, the

closing spring must be charged manually.

The closing springs of the circuit-breaker can be charged manually both with the circuit-

breaker in test position and with the circuit-breaker in service position.

Preconditions • Withdrawable circuit-breaker completely inserted and locked in the panel

• Hand crank available

Fig. 38: Actuating opening for charging the closing spring manually

Operation NXAIR


Turn control gate of operating shaft aside using the rotary button located over it.

Push hand crank onto operating shaft.

Hold the freewheel a and turn the hand crank s clockwise approx. 25 turns until

the "spring energy store charged" indication appears in the inspection window.

r The spring is latched automatically. The energy required for the operating sequence

OPEN-CLOSE-OPEN (auto-reclosing) is stored in the spring. The spring energy store

indicator changes from "spring energy store not charged" to "spring energy store

charged".

Remove the hand crank.

Close control gate of operating shaft using the rotary button.

DANGER!

Risk of injury by sudden rotation of hand crank. If you use a hand crank without a

freewheel to charge the spring, the hand crank will rotate when the control voltage is

switched on again (motor starts up) and can lead to injury.

Use special hand crank with freewheel from the accessories!


Operation NXAIR

13.11 Closing or opening the contactor

Electrical operation The contactor in the contactor panel can be closed or opened by electrical operation. The

control elements for electrical operation are located on the front door of the low-voltage

compartment.

Alternatively, electrical operation can also be done from a control board or a separate

switching room.

Mechanical operation Besides electrical opening, a contactor can also be switched off through a mechanical

opening operation. To do this, the contactor must be equipped with a mechanical closing

latch.

Mechanical opening can take place with the withdrawable contactor both in test and

service position

• see Page 44, "Racking the withdrawable contactor to service position"

• see Page 47, "Racking the withdrawable contactor to test position"

Instruction label If contactors on withdrawable parts are designed without mechanical closing latch,

these contactors are identified with an instruction label on the front cover of the

withdrawable part.

Fig. 39: Instruction label on withdrawable contactor

a Instruction label

Operation NXAIR


13.12 Feeder earthing

Preconditions for operation • The feeder to be earthed is isolated

• Withdrawable part in test position

• Operating lever available

In circuit-breaker, disconnecting and metering panels, the actuating opening and the

position indicator of the feeder earthing switch are located bottom-left on the door to the

switching device compartment; in contactor panels, bottom-right. The actuating opening

is locked by means of an additional control gate.

NOTE!

Please observe:

The instructions in this section also apply to disconnecting panels with feeder

earthing switch.

DANGER!

Once you have started a switching operation, you must complete it totally; turning back

is blocked. The operating lever cannot be removed at intermediate positions.

Do not remove the operating lever at intermediate positions.

Fig. 40: Actuating opening at the circuit-breaker and disconnecting panel

Fig. 41: Actuating opening at the contactor panel


Operation NXAIR

Procedure


Pull control gate upwards to release the actuating opening.

DANGER!


closed. If the necessary interlocks are overridden, manual switching operations are


Observe the Five Safety Rules (see Page 4, "General instructions").


ATTENTION!

If the operating lever is not inserted correctly, the earthing switch may be damaged.

Insert the operating lever in the actuating opening as far as it will go.

Fig. 42: Control gate at the circuit-breaker and disconnecting panel

Fig. 43: Control gate at the contactor panel

Operation NXAIR


Insert operating lever for feeder earthing switch into actuating opening.

Turn operating lever 180° clockwise.

r The position indicator changes to CLOSED position. The earthing switch is closed.

Remove operating lever.

Close control gate.


Fig. 44: Operating lever at the circuit-breaker and disconnecting panel

Fig. 45: Operating lever at the contactor panel


Operation NXAIR

13.13 Feeder de-earthing

Preconditions for operation • Authorization to deactivate the feeder earthing is available

In basic panels., the actuating opening and the position indicator of the feeder earthing

switch are located bottom-left on the door to the switching device compartment; in

contactor panels, bottom-right. The actuating opening is locked by means of an

additional control gate.

NOTE!

Please observe:

The instructions in this section also apply to disconnecting panels with feeder

earthing switch.

DANGER!



Do not remove the operating lever at intermediate positions

Fig. 46: Actuating opening at the circuit-breaker and disconnecting panel

Fig. 47: Actuating opening at the contactor panel

DANGER!


closed. If the necessary interlocks are overridden, manual switching operations are




Operation NXAIR


Procedure


Pull control gate upwards to release the actuating opening.

Insert operating lever for feeder earthing switch into actuating opening.

Turn operating lever 180° counter-clockwise.

r The position indicator changes to OPEN position. The earthing switch is open.

ATTENTION!

If the operating lever is not inserted correctly, the earthing switch may be damaged.

Insert the operating lever in the actuating opening as far as it will go.

Fig. 48: Control gate at the circuit-breaker and disconnecting panel

Fig. 49: Control gate at the contactor panel

Fig. 50: Operating lever at the circuit-breaker and disconnecting panel

Fig. 51: Operating lever at the contactor panel


Operation NXAIR


Close control gate.


13.14 Busbar earthing

Arrangement of controlelements

The operating mechanism of the earthing switch provided for earthing the busbar

system is located in the front upper area of the low-voltage compartment

Fig. 52: Control elements of earthing switch for busbar system

ATTENTION!



Do not remove the operating lever at an intermediate position.

Operation NXAIR


Manual operation

Preconditions • The earthing switch can only be closed if the electromagnetic interlock of the

operating mechanism is eliminated or if opening the padlock at the operating

mechanism is authorized.

• Operating lever available

Procedure

Open lock or deactivate electromagnetic interlock.

Open control gate.

Insert operating lever and turn approx. 115° clockwise.

DANGER!

Manual operations might be possible in spite of an existing electrical interlock, and this

can cause failures.



Fig. 53: Earthing switch in OPEN position and secured with lock


Operation NXAIR

While turning the operating lever, the position indicator of the earthing switch

changes from the OPEN position to the FAULTY position.

After turning the operating lever to the end position, the position indicator of the

earthing switch changes from the FAULTY position to the CLOSED position.


Close control gate.


r The busbar earthing switch was switched from the OPEN to the CLOSED position,

thus earthing the busbar. The position indicator of the earthing switch changes from

the OPEN position via the FAULTY position to the CLOSED position.

Fig. 56: Position indicator in CLOSED position

Fig. 54: Position indicator in FAULTY position

Fig. 55: Operating lever in end position

Operation NXAIR


13.15 Busbar de-earthing

Arrangement of controlelements

The operating mechanism of the earthing switch provided for earthing the busbar

system is located in the front upper area of the low-voltage compartment

Fig. 57: Control elements of earthing switch for busbar system

Manual operation

Preconditions • Operating lever available

• The earthing switch can only be opened if the electromagnetic interlock of the

operating mechanism is eliminated or if opening the padlock at the operating

mechanism is authorized.

ATTENTION!



Do not remove the operating lever at an intermediate position.

DANGER!

Manual operations might be possible in spite of an existing electrical interlock, and this

can cause failures.




Operation NXAIR

Procedure

Open lock or deactivate electromagnetic interlock.

Open control gate.

Insert operating lever and turn approx. 115° counter-clockwise.

While turning the operating lever, the position indicator of the earthing switch

changes from the CLOSED position to the FAULTY position.

Fig. 58: Earthing switch in CLOSED position and secured with lock

Fig. 59: Position indicator in FAULTY position

Operation NXAIR


After turning the operating lever to the end position, the position indicator of the

earthing switch changes from the FAULTY position to the OPEN position.


Close control gate.


r The busbar earthing switch was switched from the CLOSED to the OPEN position,

thus de-earthing the busbar. The position indicator of the earthing switch changes

from the CLOSED position via the FAULTY position to the OPEN position.

Fig. 61: Position indicator in OPEN position

Fig. 60: Operating lever in end position


Operation NXAIR

13.16 Access to connection compartment

Access through switching device compartment

Procedure Ask for permission to earth, and switch the feeder earthing switch to EARTHED (see

Page 56, "Feeder earthing").

Open the high-voltage door (see Page 32, "Opening high-voltage door of circuit-

breaker panel")

Take the withdrawable part out (see Page 71, "Taking the withdrawable circuit-

breaker, disconnector link and/or withdrawable metering unit out of the panel").

Check whether the position indicator of the feeder earthing switch in the switching

device compartment shows "I", i.e. earthed.

Remove the partition between the switching device compartment and the

connection compartment.

In circuit-breaker, disconnecting or metering panels: Remove bolts from protection

plate of switching device compartment.

Remove protection plate of switching device compartment a.

DANGER!

To perform any kind of checks or work in the connection compartment of a panel, you

must ensure that this compartment is safely isolated from supply. Otherwise the

cables in the connection compartment will be live at operating voltage.

Before removing the partition in the switching device compartment, isolate and

earth the cable connection in the connection compartment.

Before removing a rear wall on the rear side of a panel, isolate and earth the cable

connection in the connection compartment.


Verify safe isolation from supply (see Page 88, "Verification of safe isolation from

supply").

Fig. 62: Bolted joints of protection plate of switching device compartment in circuit-breaker, disconnecting and metering panels

Operation NXAIR


Remove bolts from partition to connection compartment inside switching device

compartment.

Remove partition s.

Fig. 63: Bolted joints of partition in circuit-breaker panel

Fig. 64: Bolted joints of partition in contactor panel


Operation NXAIR

Access through rear side of panel

Remove 38 bolts M8 x 20 from rear wall to connection compartment.

Remove rear wall to connection compartment.

Check whether the earthing switch blades are in EARTHED position.

Fig. 65: Circuit-breaker panel: Earthing switch open

a Indication: Earthing switch open

s Earthing switch blades in vertical position

Operation NXAIR


Now you can perform the intended work in the connection compartment.

Fig. 66: Circuit-breaker panel: Earthing switch closed (earthed)

d Indication: Earthing switch closed

f Earthing switch blades in horizontal position

Fig. 67: Contactor panel: Earthing switch open

Fig. 68: Contactor panel: Earthing switch closed (earthed) with removed partition

a Indication: Earthing switch open

d Indication: Earthing switch closed

f Earthing switch blades in horizontal position


Operation NXAIR

13.17 Taking the withdrawable circuit-breaker, disconnector link and/or withdrawable metering unit out of the panel

Preconditions Service truck available

Racking the withdrawable part to test position

High-voltage door open.

Procedure Detach the low-voltage connector. To do this, push the coupling lever upwards.

Hang the low-voltage plug into the support located underneath the low-voltage

compartment.

ATTENTION!

If the service truck is not correctly interlocked with the panel while removing the

withdrawable part, the switchgear and the withdrawable part can be seriously

damaged.

Move the withdrawable part only if the service truck is interlocked with the panel.

Move the service truck only if the withdrawable part is interlocked in its end

position on the service truck.

Operation NXAIR


Move the service truck centrally in front of the panel. Observe that the centering

brackets are positioned inside the door opening.

Push the locking edges on the left and right side of the truck into the openings

provided for this purpose in the panel frame. Observe that the guide rails of the

panel and the service truck are horizontally aligned with each other.

If required, adjust the height of the guide rails at the service truck with two open-end

spanners SW 19 at the two lower setting screws.


Operation NXAIR

Verify the position of the unlocking levers a (denoted) and d, and check whether

the service truck is correctly interlocked with the panel by pulling s the service truck

backwards.

r The service truck is interlocked with the panel.

Pulling the withdrawablepart onto the service truck

Release the interlocking between the withdrawable part and the panel by turning the

two locking levers at the withdrawable part to the outside, and pull the withdrawable

part onto the service truck by the handles until it reaches the end position.

Operation NXAIR


Turn the two locking levers at the withdrawable part to the inside in order to interlock

the withdrawable part with the service truck.

Pull the two unlocking levers on the left and right side of the service truck upwards to

release the interlocking with the panel frame.

r Now, the withdrawable circuit-breaker can be transported on the service truck.


Operation NXAIR

Fig. 69: Withdrawable part on service truck

13.18 Inserting the withdrawable circuit-breaker and/or disconnector link in a panel

Coding The mechanical coding on the low-voltage plug connector of the withdrawable part

prevents plugging the low-voltage connector on withdrawable parts with lower current

ratings in panels with higher current ratings. The withdrawable circuit-breakers and

disconnector links are differently coded.

DANGER!

Operating the switchgear with a withdrawable part that is not suitable for the

corresponding panel can cause serious damage to the switchgear.

The coding must not be changed.

NOTE!

Withdrawable contactors are designed without coding

Do absolutely observe the rated currents of the HV HRC fuse-links.

Operation NXAIR


On the rear side of the low-voltage plug connector and on the top side of the operating

mechanism box of the circuit-breaker, the disconnector link and the withdrawable

metering unit, there is a coding symbol. If the symbols are identical, the withdrawable

part concerned can be inserted in the panel.

With the mechanical coding and the coding symbols, different functions and equipment

versions are coded:

Fig. 70: Low-voltage plug connection

a Mechanical coding

Fig. 71: Low-voltage connector

a Coding symbol on the

operating mechanism

box of the circuit-breaker

s Coding symbol on the

low-voltage connector

Function Equipment version

Function of withdrawable part Withdrawable circuit-breaker and disconnector link in combination with rated normal

current of the withdrawable part versions "circuit-breaker" and "disconnector link" for

≤ 1250 A and 2500 A

Equipment versions Withdrawable part equipped without / with electromagnetic interlocking of the

disconnecting function and/or earthing switch operating function

Equipment version only for

withdrawable circuit-breaker

Equipped with a number of shunt releases, and/or combination of shunt releases with

undervoltage releases and c.t.-operated releases


Operation NXAIR

Positioning the servicetruck with the

withdrawable part in frontof the panel


breaker panel")

Verify correspondence between the position of the earthing switch operating shaft in

the withdrawable part and the earthing switch coupling in the panel.

Make sure that the coupling pin of the earthing switch operating shaft in the

withdrawable part and the earthing switch coupling in the switching device

compartment are in vertical position.

ATTENTION!

If the service truck is not correctly interlocked with the panel while inserting the


damaged.




Fig. 72: Coupling pin in the earthing switch operating shaft

Fig. 73: Earthing switch coupling in the switching device compartment

Operation NXAIR


Move the service truck centrally in front of the panel. Observe that the centering

brackets are positioned inside the door opening.

Push the locking edges on the left and right side of the truck into the openings

provided for this purpose in the panel frame. Observe that the guide rails of the

panel and the service truck are horizontally aligned with each other.

If required, adjust the height of the guide rails at the service truck with two open-end

spanners SW 19 at the two lower setting screws.


Operation NXAIR

Verify the position of the unlocking lever, and check whether the service truck is

correctly interlocked with the panel by pulling the service truck backwards.

r The service truck is interlocked with the panel.

Pushing the withdrawablepart into the panel

Turn the locking levers at the operating traverse of the withdrawable part to the

outside.

Pull the unlocking handle of the service truck out.

Operation NXAIR


Push the withdrawable part into the panel as far as it will go.

Interlock the withdrawable part with the panel by turning the two locking levers at

the operating traverse of the withdrawable part inside.

The withdrawable part is correctly interlocked with the panel when both locking

levers latch tight inside.

Pull the two unlocking levers on the left and right side of the service truck upwards to

release the interlocking with the panel frame.

Pull the service truck back away from the panel at the black fabric edge.

Mount the low-voltage connector carefully and push the coupling lever downwards.

r Now, the withdrawable part is inserted in the panel.


Operation NXAIR

13.19 Taking the withdrawable contactor out of the panel

Preconditions Service truck available

Withdrawable contactor in test position

High-voltage door open

Procedure Move the service truck centrally in front of the contactor panel. Bring the centering

bolts a of the service truck into line with the centering openings s at the panel

base.

ATTENTION!

If the service truck is not properly interlocked with the panel while removing the


damaged.




NOTE!

Withdrawable contactors are designed without coding

Do absolutely observe the rated currents of the HV HRC fuse-links.

a Centering bolt

s Centering opening

d Locking bracket

f Locking plate

Operation NXAIR


Fold the locking bracket d upwards. This will lower the locking plate f.

r The service truck is interlocked with the contactor panel.

Pulling the withdrawablecontactor onto the service

truck

Open the two locking levers s at the withdrawable contactor.

Fig. 74: Preparing the withdrawable contactor for removal

a Withdrawable contactor

s Locking lever

d Service truck

f Locking bracket


Operation NXAIR

Pull the withdrawable contactor a out of the switching device compartment and

onto the service truck d until the withdrawable contactor latches tight on the

service truck.

The low-voltage connection is separated automatically.

r Now the locking bracket f can be lowered, and the service truck with the

withdrawable contactor can be removed.

13.20 Inserting the withdrawable contactor in the panel

Before inserting thewithdrawable contactor

If required, close the feeder shutter and secure it with a padlock (see Page 99,

"Closing the feeder shutter (lower shutter)").

If required, close the busbar shutter and secure it with a padlock (see Page 100,

"Closing the busbar shutter (upper shutter)").

NOTE!

When the withdrawable contactor is inserted, the mechanism for manual operation of

the feeder shutter and the busbar shutter is not accessible.

Insert the withdrawable contactor in the panel only if the feeder shutter and the

busbar shutter are closed and secured with a padlock each.

Operation NXAIR


Inserting the withdrawablecontactor in the panel

Before inserting the withdrawable contactor, check the position of the earthing

switch coupling. The coupling must be in position s, then the receptacle a for the

coupling pin of the earthing switch operating shaft d is in vertical position.

Fig. 75: Feeder and busbar shutters closed and locked

a Padlock

s Padlock

d Feeder shutter, closed

f Busbar shutter, closed

Fig. 76: Earthing switch coupling in the switching device compartment

a Receptacle for coupling pin

s Marking in "O" position


Operation NXAIR

Make sure that the coupling pin of the earthing switch operating shaft d in the

withdrawable part is in vertical position.

The low-voltage connection f couples automatically when the withdrawable

contactor is inserted.

Positioning the servicetruck with the

withdrawable part in frontof the panel


breaker panel").

Move the service truck with the withdrawable contactor centrally in front of the

contactor panel. Bring the centering bolts of the service truck into line with the

centering openings at the panel base.

Fold the locking bracket at the service truck upwards. The service truck is interlocked

with the contactor panel.

Release the withdrawable contactor from the service truck using the pedal, and push

it completely into the contactor panel.

Fig. 77: Coupling pin of the earthing switch operating shaft

d Coupling pin

f Low-voltage connection

ATTENTION!

If the service truck is not properly interlocked with the panel while inserting the


damaged.

Move the withdrawable part only if the service truck is interlocked with the

contactor panel.



Operation NXAIR


Fold the locking bracket at the service truck downwards. The service truck can be

removed.

Close the two locking levers at the withdrawable contactor.

Fig. 80: Closing the locking levers

Fig. 78: Pedal at the service truck Fig. 79: Pushing the withdrawable contactor into the panel


Operation NXAIR

Fig. 81: Locking lever closed

r The withdrawable contactor is interlocked with the contactor panel.

Close the high-voltage door (see Page 34, "Closing the high-voltage door of the

circuit-breaker panel").

13.21 Emergency operation of the feeder earthing switch without the withdrawable circuit-breaker inserted in the panel

Feeder earthing (emergency operation without interlocking)

Preconditions for operation • Tool adapter for emergency operation

Procedure Open high-voltage door.

Push tool adapter on coupling of operating mechanism in switching device

compartment.

Turn tool adapter clockwise.

r The feeder earthing switch can be clearly heard to close. The position indicator

changes from "0" position to "I" position.

ATTENTION!

Manual emergency operations without withdrawable part are possible despite an

existing electrical interlock, and this can cause failures.


Ensure that the intended manual emergency operation without withdrawable part

has been released externally.

Operation NXAIR


Feeder de-earthing

Preconditions for operation • Tool adapter for emergency operation

Procedure Open high-voltage door.

Push tool adapter on coupling of operating mechanism in switching device

compartment.

Turn tool adapter counter-clockwise.

r The feeder earthing switch can be clearly heard to open.

r The position indicator changes from position "I" to position "O".

r Ensure that the coupling in the panel and the shaft from the withdrawable unit are in

the same position, before inserting the wiithdrawable unit.

13.22 Verification of safe isolation from supply

To perform any kind of checks or work in the busbar compartment or the connection

compartment of a panel, you must ensure that these compartments are safely isolated

from supply.

As voltage indicators, two device systems are used. CAPDIS device system installed

directly in the low-voltage door, and LRM device system as an indicator with the

associated measuring system installed below the low-voltage door.

Fig. 82: Voltage indicator LRM

Fig. 83: Voltage indicator CAPDIS

ATTENTION!

Manual emergency operations without withdrawable part are possible despite an

existing electrical interlock, and this can cause failures.


Ensure that the intended manual emergency operation without withdrawable part

has been released externally.


Operation NXAIR

To check the perfect operation of the indicator, it is advisable to test it first in live

condition.

With the voltage indicators of the LRM system, repeat tests must be performed in

accordance with IEC 61243-5.

The year of the last repeat test is noted on the panel front, next to test socket L3.

Fig. 84: Function test unit for voltage indicator

Procedure

Insert the voltage indicator successively in all three feeder test sockets of the phases

L1, L2, L3 (on the left side of the panel). If the indicator does not flash or light up in

any of the three test sockets, the feeder is not live.

ATTENTION!

The function of the surge arrester installed is impaired if short-circuiting jumpers are

used.

Use voltage indicators according to IEC 61243-5 only.

Operation NXAIR


Insert the voltage indicator successively in all three busbar test sockets of the

phases L1, L2, L3 (on the right side of the panel). If the indicator does not flash or

light up in any of the three test sockets, the busbars are not live.

In panels with degree of protection IP51 for the metal enclosure, the test sockets are

protected with covers.

Refit the covers after having verified safe isolation from supply.

Features ofCAPDIS-S1+/-S2+

• Maintenance-free

• Integrated repeat test of the interfaces (full lightning flash)

• Without auxiliary power

• Option: CAPDIS S2+ with remote indication of voltage state (auxiliary power required)

• With test sockets (LRM system) for phase comparison behind the cover

Fig. 85: CAPDIS-S2+: Cover closed Fig. 86: CAPDIS-S2+: Cover open

a LC display g Test socket L2

s "Display Test" button h Test socket L3

d Cover j Earth socket

f Test socket L1 k Short instructions


Operation NXAIR

IndicationsCAPDIS -S1+/-S2+

13.23 Connecting earthing and short-circuit facility

To reach the fixed mating contacts, open the corresponding shutter (see Page 92,

"Manual operation of shutters in circuit-breaker and disconnecting panels").

CAPDIS-S1+ CAPDIS-S2+

L1 L2 L3 L1 L2 L3

Operating voltage not present (CAPDIS-

S2+)

Operating voltage present

- Operating voltage not present

- Auxiliary power not present (CAPDIS-S2+)

Earth fault or failure in phase L1,

operating voltage at L2 and L3

Voltage (not operating voltage) present

Indication: "Device function test" passed

Indication: "ERROR" e.g. in case of

missing auxiliary voltage (CAPDIS-S2+)

DANGER!

High voltage! Danger! If the busbars in the busbar compartment and the cable or bar

connections in the connection compartment have not been isolated, the contacts are

live at operating voltage.

Isolate the busbars in the busbar compartment and the cable or bar connections in

the connection compartment before opening the shutters.


Verify safe isolation from supply.

Operation NXAIR


Preconditions Earthing accessories available

Feeder bushings Fix earthing clamp of earthing accessories f on earthing busbar g.

Plug connectors of earthing accessories f on fixed mating contacts s of feeder

bushings d (lower bushing row) and screw tight.

r Feeder connected to earthing busbar.

Busbar bushings Fix earthing clamp of earthing accessories f on earthing busbar g.

Plug connectors of earthing accessories f on fixed mating contacts s of busbar

bushings a (upper bushing row) and screw tight.

r Busbars connected to earthing busbar.

13.24 Manual operation of shutters in circuit-breaker and disconnecting panels

The feeder and busbar shutters can be opened individually. When one shutter is opened,

the mechanism of the other one can be padlocked. If both shutters have to be opened at

the same time, locking the shutter mechanism is omitted during the following

operations.

Fig. 87: Earthing accessories, mounted

a Busbar bushings

s Fixed mating contacts

d Feeder bushings

f Earthing accessories

g Earthing clamp on earthing

busbar.


Operation NXAIR

Opening the feeder shutter (lower shutter)

Rack withdrawable circuit-breaker to test position.

Take circuit-breaker out of panel (see Page 71, "Taking the withdrawable circuit-


Padlock busbar shutter mechanism on left side of panel.

Push slip-on lever on feeder shutter mechanism on right side of panel.

DANGER!








Operation NXAIR


Operate the slip-on lever outside the panel to open the shutters: Push the handle

down. The slip-on lever latches tight and the feeder shutter opens automatically.

Perform voltage test or other intended operation.

Closing the feeder shutter

Push handle of slip-on lever lightly to the left (to release the latch) and let it slip

upwards. The shutter closes automatically.

Remove slip-on lever for shutters.

Remove padlock from busbar shutter mechanism on left side of panel.

Insert circuit-breaker in panel (see Page 75, "Inserting the withdrawable circuit-

breaker and/or disconnector link in a panel").

Close high-voltage door.

Opening the busbar shutter (upper shutter)

Rack withdrawable circuit-breaker to test position.

Take circuit-breaker out of panel (see Page 71, "Taking the withdrawable circuit-



Operation NXAIR

Padlock feeder shutter mechanism on right side of panel.

Push slip-on lever on busbar shutter mechanism on left side of panel.

Operate the slip-on lever outside the panel to open the shutters: Push the handle

down. The slip-on lever latches tight and the busbar shutter opens automatically.


Operation NXAIR


Closing the busbar shutter

Push handle of slip-on lever lightly to the right (to release the latch) and let it slip

upwards. The shutter closes automatically.

Remove slip-on lever for shutters.

Remove padlock from feeder shutter mechanism on right side of panel.

Insert circuit-breaker in panel (see Page 75, "Inserting the withdrawable circuit-

breaker and/or disconnector link in a panel").

Close the high-voltage door.

13.25 Manual operation of shutters in the contactor panel

The feeder and busbar shutters can be opened individually. When one shutter is opened,

the mechanism of the other one can be padlocked. If both shutters have to be opened at

the same time, locking the shutter mechanism is omitted during the following

operations.

DANGER!









Operation NXAIR

Preparing shutter operation

Rack the withdrawable contactor to test position.

Open the high-voltage door.

Take the withdrawable contactor out of the panel (see Page 81, "Taking the

withdrawable contactor out of the panel").

The shutter mechanism for manual operation of the shutters is located top-left in the

switching device compartment of the contactor panel.

Fig. 88: Front view of contactor panel, high-voltage door open and withdrawable contactor removed

a Shutter mechanism for manual

operation

s Busbar shutter

d Feeder shutter

Operation NXAIR


Description of the shutter mechanism for manual operation

Fig. 89: Control elements of the shutter mechanism

a Padlock

s Padlock

d Shutter operating lever with handle for

operation of the busbar shutter

f to h,

k

Locking buttons

j Shutter operating lever with handle for

operation of the feeder shutter

l Busbar shutter, closed

; Feeder shutter, closed


Operation NXAIR

Opening the feeder shutter (lower shutter)

Loosen the locking buttons h and k.

Open and remove the padlock a.

Turn the shutter operating lever j clockwise by the handle as far as it will go.

Tighten the locking buttons h and k.

Fig. 90: Feeder shutter open

r The feeder shutter ; is open.


Closing the feeder shutter (lower shutter)

Loosen the locking buttons h and k.

Turn the shutter operating lever j counter-clockwise by the handle as far as it will

go.

Tighten the locking buttons h and k.

Refit the padlock a and lock it.

r The feeder shutter ; is closed.


Operation NXAIR


Opening the busbar shutter (upper shutter)

Loosen the locking buttons f and g.

Open and remove the padlock s.

Turn the shutter operating lever d counter-clockwise by the handle as far as it will

go.

Tighten the locking buttons f and g.

Fig. 91: Busbar shutter open

r The busbar shutter l is open.


Closing the busbar shutter (upper shutter)

Loosen the locking buttons f and g.

Turn the shutter operating lever d clockwise by the handle as far as it will go.

Tighten the locking buttons f and g.

Refit the padlock s and lock it.

r The busbar shutter l is closed.



Operation NXAIR

13.26 Application of HV HRC fuse-links

Replacing HV HRC fuse-links

Preconditions The dimensions of the HV HRC fuse-links must conform to DIN 43625.

To replace the HV HRC fuse-links, the withdrawable contactor must be taken out of

the panel (see Page 81, "Taking the withdrawable contactor out of the panel")

DANGER!

High voltage! Danger! Before performing any kind of work or test in a connection

compartment with tripped fuse, isolate the feeder.

Open the vacuum contactor.

Rack the withdrawable part to test position.

Earth the feeder.

Observe the Five Safety Rules.

DANGER!

Danger of burning on hot fuse-links.

Use the personal protective equipment.

Let hot fuse-links cool down before replacing.

ATTENTION!

Even if the withdrawable part shows no visible damages of a fault, the fuse may have

tripped due to a fault.

Check the switching device compartment for deformations when a fuse has

tripped.

NOTE!

Tripped fuses can cause hidden damages on the other fuses.

Always replace all fuse-links, even if only one fuse has tripped.

Operation NXAIR


Permissible HV HRCfuse-links

Use only fuse-links from the table below.

Table of permissible HV HRC fuse-links:

• Back-up fuses for motor protection make SIBA, type HHM for rated currents In

with: 40 A ≤ In ≤ 315 A

• Back-up fuses for standard protection make Firma SIBA, type HHD for rated

currents In with: 6.3 A ≤ In < 50 A

Necessary extension tubes for HV HRC fuse-links with reference dimension

"e" < 442 mm

Design of fuse-links according to IEC 60282 - 1 with dimensions according to DIN 43625.

Ur

[kV]

In HV HRC fuse

[A]

Reference dimension "e"

[mm]

HV HRC fuse-link

Order no. Type

7.2 6.3 192 3000213.6,3 HHD

10 192 3000213.10 HHD

16 192 3000213.16 HHD

20 192 3000213.20 HHD

25 192 3000213.25 HHD

31.5 192 3000213.31,5 HHD

40 192 3000213.40 HHD

50 442 3010853.50 HHM

63 442 3010853.63 HHM

80 442 3010853.80 HHM

100 442 3010853.100 HHM

125 442 3010953.125 HHM

160 442 3010953.160 HHM

200 442 3010954.200 HHM

250 442 3010954.250 HHM

315 442 3010954.315 HHM

Ur

[kV]

In HV HRC fuse

[A]

Reference dimension "e"[mm]

HV HRC fuse-link

Order no. Type

12 6,3 292 3000213.6,3 HHD

10 292 3000213.10 HHD

16 292 3000213.16 HHD

20 292 3000213.20 HHD

25 292 3000213.25 HHD

31,5 292 3000213.31,5 HHD

40 292 3000213.40 HHD

50 442 3010853.50 HHM

63 442 3010853.63 HHM

80 442 3010853.80 HHM

100 442 3010853.100 HHM

125 442 3010953.125 HHM

160 442 3010953.160 HHM

Order no.: SIBA HV HRC fuse-link with reference dimension "e"

[mm]

3400602 192

3400601 292


Operation NXAIR

Procedure Verify safe isolation from supply of the feeder.

Open the fuse brackets over the HV HRC fuse-links with a suitable screwdriver.

Pull the HV HRC fuse-link at the end without the striker upwards out of the fuse

clips and remove all HV HRC fuse-links.

ATTENTION!

Withdrawable contactors are exclusively designed for operation with HV HRC fuse-

links.

Operate withdrawable contactor with HV HRC fuse-links only.

Do not mount bridging links instead of HV HRC fuse-links.

Fig. 92: Opening the fuse bracket with a screwdriver

Fig. 93: Fuse clip open

Fig. 94: HV HRC fuse-link: End without striker Fig. 95: HV HRC fuse-link: End with striker

a Arrow to indicate the location of the striker

s Striker

Operation NXAIR


Insert the new HV HRC fuse-link. The striker s must point towards the operating

front of the withdrawable part. The position of the striker is identified with an arrow

on the fuse-link a.

Fig. 96: Mounted HV HRC fuse-links

r The HV HRC fuse-links have been replaced.

NOTE!

Electrical indication of tripped fuse-links

Electrical indications at the panel or in the remote control room are automatically

reset to operating mode by replacing the HV HRC fuse-links.


Operation NXAIR

13.27 Normal current of the HV HRC fuse-links

The current carrying capacity of the withdrawable contactor with HV HRC fuse-links

performs according to the tables below:

Current carrying capacity ata system frequency of 50 Hz

Current carrying capacity ata system frequency of 60 Hz

Un Ith f Number per phase

In HV HRC

fuse

Current carrying capacity in [A] at ambient temperature in [°C]

[kV] [kA] [Hz] Order no. [A] 25 30 35 40 45 50 55

7.2 <= 31.5 50 3011054.250 2 250 344 333 322 310 298 285 272

3011054.200 2 200 284 275 266 256 246 235 225

3010953.160 2 160 250 242 233 225 216 207 197

3011054.315 1 315 264 256 247 238 229 219 209

3011054.250 1 250 224 217 210 202 194 186 177

3011054.200 1 200 184 178 172 166 159 153 146

3010953.160 1 160 161 156 150 145 139 133 127

3010953.125 1 125 124 120 116 112 108 103 98

3010853.100 1 100 100 97 93 90 86 83 79

3010853.80 1 80 80 79 76 74 71 68 65

3010853.63 1 63 63 63 63 63 63 63 63

3010853.50 1 50 50 50 50 50 50 50 50

Un Ith f Number

per phase

In HV HRC

fuse

Current carrying capacity in [A] at ambient

temperature in [°C]

[kV] [kA] [Hz] Order no. [A] 25 30 35 40 45 50 55

12 <= 31,5 50 3010353.160 2 160 212 205 198 191 184 176 168

3010353.160 1 160 136 132 128 123 118 113 108

3010253.125 1 125 105 102 99 95 91 87 83

3010253.100 1 100 84 82 79 76 73 70 67

3010253.80 1 80 69 67 64 62 60 57 54

3010153.63 1 63 59 57 55 53 51 49 46

3010153.50 1 50 47 45 44 42 40 39 37

Un Ith f Number

per phase

In HV HRC

fuse



[kV] [kA] [Hz] Order no. [A] 25 30 35 40 45 50 55

7.2 <= 31.5 60 3011054.250 2 250 339 328 317 305 293 281 268

3011054.200 2 200 280 271 262 252 242 232 221

301093.160 2 160 246 238 230 222 213 204 194

3011054.315 1 315 260 252 243 234 225 216 206

3011054.250 1 250 221 214 206 199 191 183 175

3011054.200 1 200 181 176 170 164 157 150 143

3010953.160 1 160 158 153 148 143 137 131 125

3010953.125 1 125 122 119 114 110 106 101 97

3010853.100 1 100 98 97 92 90 86 83 79

3010853.80 1 80 79 78 75 73 70 67 64

3010853.63 1 63 63 63 63 63 63 63 63

3010853.50 1 50 50 50 50 50 50 50 50

Operation NXAIR


For rated fuse currents <= 63 A, no current reductions must be considered due to the

ambient temperature and the system frequency.

13.28 Motor starting currents

Due to the arising motor starting current, the instant when the motor starts represents

the maximum stress for the HV HRC fuse-link. Motor starting currents are dependent on

the starting time and the starting frequency.

The latest motor protection tables with HV HRC fuse-links type HHM are available in the

download area of the SIBA company: www.SIBA.de

These motor protection tables show the correspondence between the maximum

permissible starting currents of downstream HV motors (depending on the stating time

and the starting frequency) and the associated HV HRC fuse-links.

Un Ith f Number

per phase

In HV HRC

fuse



[kV] [kA] [Hz] Order no. [A] 25 30 35 40 45 50 55

12 <= 31,5 60 3010353.160 2 160 205 199 192 185 178 170 162

3010353.160 1 160 132 128 124 119 115 110 105

3010253.125 1 125 102 99 96 92 88 85 81

3010253.100 1 100 82 79 76 74 71 68 65

3010253.80 1 80 67 65 62 60 58 55 53

3010153.63 1 63 57 55 53 51 49 47 45

3010153.50 1 50 45 44 42 40 39 37 36


Operation NXAIR

13.29 Coordinating the components of the motor circuit

The illustration below shows the coordination of a HV HRC fuse characteristic with a

motor characteristic as an example:

The latest time-current characteristics for HV HRC fuse links type HHM are available in

the download area of the SIBA company: www.SIBA.de

Coordination Rules for coordinating the components of the motor circuit:

• The time-current characteristic must be located on the right of the motor starting

current (point A).

• The rated current of the HV HRC fuse-link must exceed the normal current of the

motor.

• The current corresponding to the intersection B of the HV HRC fuse-link characteristic

and the characteristic of the overcurrent-time protection must be higher than the

minimum breaking current of the HV HRC fuse-link.

• If this is not feasible, it must be ensured that overload currents that are smaller than

the minimum breaking current of the HV HRC fuse-link are interrupted by the

switching device via the striker. This prevents thermal overloading of the HV HRC fuse-

link, which would otherwise be destroyed.

• The selected HV HRC fuse-link limits the sustained symmetrical short-circuit

currentrom IK to the let-through current ID, shown in the diagram for the current-

limiting characteristics (ID as a function of IK for HV HRC fuse-links with different rated

currents). The maximum permissible let-through current is ID = 46 kA.

Fig. 97: Example for the coordination of a HV HRC fuse characteristic 125 A with a motor characteristic

a Characteristic of the HV HRC fuse

s Motor starting current

d Motor starting time

f Characteristic of the overcurrent-time protection

Operation NXAIR


Requirements The coordination of the components of the motor circuit places the following

requirements:

• The let-through current ID must not exceed 46 kA at 7.2 kV/12 kV.

• In case of low-voltage supply via a control transformer, short-circuit currents ranging

above the limit breaking capacity must be interrupted within 80 ms. This requirement

does not apply if

- the mechanical latch is provided

- or

- the opening times have been extended so much, that – in the a.m. current range –

the contactor can only open when the fuse has interrupted the current

• The limit breaking capacity is:

- 3TL62: 5.0 kA

- 3TL63: 5.0 kA

- 3TL66: 4.5 kA

• Due to the arising motor starting current, the instant when the motor starts represents

the maximum stress for the HV HRC fuse-link. This stress must neither operate nor

pre-damage the fuse-link.

• Other factors of influence on the stress of the HV HRC fuse-links are the starting time

and the starting frequency of the motors.

13.30 Key-operated interlocking with Ronis® locks

Key-operated interlocks with Ronis® locks are available for circuit-breaker and

disconnecting panels NXAIR.

Interlocking functions With these key-opertaed interlocks, three interlocking functions are available.

The key is only released from the Ronis® lock if:

• the withdrawable part is racked to test position. This interlocks the possibility to rack

the withdrawable part concerned to service position.

• the associated earthing switch is in OPEN position. This interlocks the possibility to

switch the earthing switch to CLOSED position.

• the associated earthing switch is in CLOSED position. This interlocks the possibility to

switch the earthing switch to OPEN position.

Release The respective function is released again by re-inserting the key in the associated lock

and releasing the lock.


Operation NXAIR

Combinations These three interlocking functions are available either as individual interlock or as a

combination of two or all three interlocking functions.

Cover Access to Ronis®-locks is located on the right of the standard actuating and control

openings on the high-voltage door, and protected with a cover. The cover is secured with

a rotary button on the high-voltage door.

NOTE!

Key-operated interlocking with Ronis® locks is additional to the mechanical interlocks.

For information to mechanical interlocks, see Page 12, "Interlocks".

NOTE!

Combination of Ronis® key-operated interlocks with electromagnetic interlocks is not

feasible.

For information to standard electromagnetic interlocks, see Page 12, "Interlocks".

Fig. 98: Front view of withdrawable panel with key-operated interlock, cover secured (panel width 800 mm and 1000 mm)t

a Cover

s Rotary button to secure the

cover

Operation NXAIR


Actuation of the individual Ronis® key-operated interlocks

Turn rotary button counter-clockwise until it is possible to lift the cover

Turn Ronis® key counter-clockwise according to the required function and remove

key.

r The selected function is interlocked with a Ronis® lock.

Fig. 99: Cover lifted

a Cover, lifted

s Screw thread for rotary button

d Key release: Only when feeder earthing

switch is in CLOSED position

f Key release: Only when feeder earthing

switch is in OPEN position

g Key release: Only when withdrawable part is

racked to test position

NOTE!

The key-operated interlocking functions for the position of the withdrawable part and

the position of the earthing switch in OPEN position or CLOSED position can be

interlocked in combination.

The interlocking functions for the position of the earthing switch in OPEN position

or CLOSED position can not be interlocked in combination.


Operation NXAIR

Example The following illustration shows exemplary the interlocking of the function "Key is

released when earthing switch is in CLOSED position"

Finally lower the cover and secure with the rotary button on the high-voltage door.

Release To release the interlocked function, perform the described operations in reverse order.

Fig. 100: Example of interlocking function

a Ronis® key

removed

s Earthing switch in

CLOSED position

Operation NXAIR


14 Trouble shooting

Interlocking of withdrawable part

Withdrawable part

Earthing switch

Circuit-breaker

Fault Cause Remedy

Withdrawable part cannot be pushed completely

into the panel and interlocked

Positions of earthing switch operating mechanism

(withdrawable part) and earthing switches (panel)

not in line

Bring the positions of the earthing switch operating

mechanism (withdrawable part) and the earthing

switches into line

Withdrawable part cannot be pulled out of panel Interlocking of withdrawable part closed Open interlocking of withdrawable part

High-voltage door cannot be closed Low-voltage connector not plugged in Plug low-voltage connector in

High-voltage door cannot be opened Withdrawable part in service position Rack withdrawable part to test position

Fault Cause Remedy

Control gate cannot be opened (withdrawable part

cannot be moved to service position

(mechanically))

Operating lever inserted in manual CLOSE/OPEN

mechanism of feeder earthing switch

Remove operating lever

Control gate locked Open lock

Double-bit key for operating the disconnector

function can be inserted, but not turned to the right

Circuit-breaker in CLOSED position Switch circuit-breaker to OPEN position

Earthing switch in CLOSED position Switch earthing switch to OPEN position

Door not closed Close the door

Fault Cause Remedy

Control gate for feeder earthing switch cannot be

opened

Crank for "racking withdrawable part" inserted Remove crank for "racking withdrawable part"

General switchgear interlock active Observe general switchgear interlock


Control gate for busbar earthing switch cannot be

opened

General switchgear interlock active Observe general switchgear interlock


Operating lever cannot be inserted Withdrawable part in service position and circuit-

breaker in CLOSED/OPEN position

Rack withdrawable part to test position. Switch

circuit-breaker to OPEN position, if required.

Fault Cause Remedy

Circuit-breaker cannot be closed Crank for "racking withdrawable part" inserted Remove crank for "racking withdrawable part"

Withdrawable part in "intermediate position" Rack withdrawable part to "service position" or "test

position

Spring not charged Wait for 15 s (motor) or charge manually

Undervoltage release not activated Activate undervoltage release

Spring energy store is not charged automatically No control voltage Apply control voltage or charge spring energy store

manually


15 Index

A

Accessories, maintenance........................................... 22

B

Bus riser panel............................................................... 8

Bus sectionalizer ........................................................... 8

Busbar de-earthing ...................................................... 64

Busbar earthing ........................................................... 61

Busbar earthing switch, trouble shooting................... 112

Bushing-type current transformer, maintenance ......... 22

Bushing-type insulator, maintenance .......................... 22

C

Circuit-breaker panel...................................................... 7

Circuit-breaker, closing ................................................ 49

Circuit-breaker, opening............................................... 51

Circuit-breaker, trouble shooting................................. 112

Closing, circuit-breaker ............................................... 49

Closing, contactor ....................................................... 55

Contactor panel ............................................................. 9

Contactor type 3TL6.....................................................18

Contactor, closing........................................................ 55

Contactor, opening ...................................................... 55

Control elements......................................................... 27

Control elements, overview .......................................... 7

Control gate, fault ....................................................... 112

Control voltage, failure................................................. 53

Control voltage, technical data .....................................14

D

Data, technical ..............................................................14

De-earthing, feeder ..................................................... 59

Dimensions of the switchgear......................................14

Disconnecting panel ...................................................... 8

Disposal....................................................................... 25

Due application.............................................................. 5

E

Earthing switch, maintenance ..................................... 22

Earthing, busbar .......................................................... 61

Earthing, connecting ................................................... 91

Earthing, feeder........................................................... 56

Electrical data ...............................................................14

Emergency operation .................................................. 53

Emergency operation, feeder earthing ........................ 87

F

Features, switchgear......................................................6

Feeder de-earthing.......................................................59

Feeder earthing............................................................56

Feeder earthing switch, trouble shooting .................. 112

Feeder earthing, emergency operation ........................87

Fuse-links, replacing................................................... 101

H

HV HRC fuse-links, normal current ............................ 105

HV HRC fuses ............................................................ 101

I

Inserting, withdrawable contactor................................83

Inserting, withdrawable part ........................................75

Interlocking of withdrawable part,

trouble shooting ......................................................... 112

Interlocks...................................................................... 12

K

Key-operated interlocking........................................... 108

M

Maintenance ................................................................20

Maintenance, corrective...............................................22

Maintenance, preventive..............................................22

Metering panel...............................................................8

Motor circuit, coordination ......................................... 107

Motor starting currents .............................................. 106

N

Normal current, HV HRC fuse-links............................ 105

O

Opening, circuit-breaker...............................................51

Opening, contactor ......................................................55

Operating conditions.................................................... 17

Operating tools ............................................................29

Operation ...............................................................26, 27

P

Padlock, trouble shooting........................................... 112

Panel design................................................................. 10

Panel types, general.......................................................7

Panels, maintenance....................................................22

Prescriptions and standards......................................... 14

Preventive maintenance...............................................20

Q

Qualified personnel ........................................................5


R

Remote control, busbar de-earthing ............................ 64

Removing, withdrawable contactor ............................. 81

Removing, withdrawable part ...................................... 71

Replacing, fuse-links ...................................................101

Revision schedule ........................................................ 22

Ronis® lock................................................................ 108

S

Safe isolation from supply, verification ........................ 88

Safety instructions ......................................................... 4

Safety instructions, operation ...................................... 26

Service information...................................................... 20

Short-circuit facility ...................................................... 91

Shutter, manual operation, contactor panel ................. 96

Shutter, manual operation, withdrawable panel........... 92

Signal terms and definitions .......................................... 4

Spring charging ............................................................ 53

Spring energy store, trouble shooting.........................112

Spring indications ........................................................ 53

Surge arrester, impaired function................................. 88

Switchgear room, dimensions ..................................... 15

T

Technical data ...............................................................14

Test sockets for voltage detecting systems .................. 7

Trouble shooting ......................................................... 112

V

Vacuum circuit-breaker type 3AE .................................17

Visual inspection.......................................................... 21

Voltage indicator .......................................................... 88

W

Withdrawable circuit-breaker, racking to

service position ........................................................... 36

Withdrawable circuit-breaker, racking to

test position................................................................. 40

Withdrawable contactor, inserting............................... 83

Withdrawable contactor, racking to

service position ........................................................... 44

Withdrawable contactor, racking to test position ........ 47

Withdrawable contactor, removing.............................. 81

Withdrawable part in intermediate position

(faulty position) ............................................................ 53

Withdrawable part, inserting ....................................... 75

Withdrawable part, removing .......................................71

Withdrawable part, trouble shooting .......................... 112

Imprint

Siemens AG

Energy Sector

Division Power Distribution

Schaltanlagenwerk Frankfurt

Carl-Benz-Str. 22

D-60386 Frankfurt

© Siemens AG 2010

Documents

NXAIR BA v2 EN - Siemens · † Bus sectionalizer † busbar connection panel † Contactor panel 6.1 Circuit-breaker panel The circuit-breaker panel is the basic panel type of NXAIR