Celdas Abb Sf6 Zx1.2

ZX1.2

Gas-insulated medium voltage switchgear

Instruction manual BA 468/01 E

PowerITPowerIT

Ihre Sicherheit hat Vorrang immer!Your safety first always!

Only install switchgear and/or switchboards in enclosed rooms suitable forelectrical equipment.

Ensure that installation, operation and maintenance are carried out byspecialist electricians only.

Comply in full with the legally recognized standards (DIN VDE / IEC), theconnection conditions of the local electrical utility and the applicable safetyat work regulations.

Observe the relevant information in the instruction manual for all actionsinvolving switchgear and switchboards.

Danger!

Pay special attention to the hazard notes in the instruction manual marked withthis warning symbol.

Make sure that under operation condition of the switchgear or switchboardthe specified data are not exceeded.

Keep the instruction manual accessible to all persons concerned withinstallation, operation and maintenance.

The users personnel are to act responsibly in all matters affecting safety atwork and the correct handling of the switchgear.

If you have any further questions on this instruction manual, the members of ourfield organization will be pleased to provide the required information.

That's why our instruction manual begins with these recommendations:

WARNUNGAnerkannte Regeln der Technik und Betriebsanleitungen

beachten !

Gefhrliche Spannung kann elektrischen Schock und Verbrennungen verursachen.

Vor Aufnahme von Arbeiten jeder Art dieses Gert unbedingt freischalten,erden und kurzschlieen.

WARNINGAlways observe the instruction manual and follow the rules

of good engineering practice !

Hazardous voltage can cause electrical shock and burns.

Disconnect power, then earth and short-circuit before proceedingwith any work on this equipment.

4Contents Page

1 Summary 6

1.1 General 6

1.2 Standards and specifications 6

1.2.1 Switchgear production 6

1.2.2 Installation and operation 6

1.3 Operating conditions 6

1.3.1 Normal operating conditions 6

1.3.2 Special operating conditions 6

2 Technical data 7

2.1 Panel type ZX1.2 7

2.2 Busbar compartment with disconnector/earthing switch type UX2TE 8

2.3 Dimensions and weights 9

2.4 Resistance to internal arc faults 11

3 Design and function of the switch-gear system and its equipment 12

3.1 Design and equipment of the panels 12

3.2 Gas system in the panels/switchgear 13

3.2.1 Monitoring of operating pressure 13

3.2.2 Limitation of the effects ofan internal arc fault 13

3.3 Vacuum circuit-breaker, type VD4 X 13

3.4 Disconnector/earthing switch,type UX2TE 13

3.5 High voltage connections 13

3.6 Control and monitoring 14

3.6.1 Bay control and protectionunit REF542 plus 14

3.6.2 Bay control unit CC (optional) 14

3.7 Conventional secondary systems incombination with a protection device 14

3.7.1 Conventional control 15

3.8 Protection against maloperation/interlock dependencies 15

3.8.1 Interlocks in general 15

3.8.2 Function of the interlock betweenthe circuit-breaker and the three-position switch 15

3.9 Earthing a tee-off 16

3.9.1 Electrical operation using the bay controland protection unit REF542 plus orpush buttons on the panel front 16

3.9.2 Manual earthing 16

Contents Page

3.10 Earthing the busbar 17

3.10.1 Electrical earthing of a busbar sectionusing the sectionalizer/riser 17

3.10.2 Manual earthing of a busbar sectionusing the sectionalizer/riser 17

3.10.3 Maintenance earthing of a busbarusing the test sockets in a tee-off 17

3.11 Test facilities 18

4 Despatch and storage 24

4.1 Condition on delivery 24

4.2 Packaging 24

4.3 Transport 24

4.4 Delivery 24

4.5 Intermediate storage 24

5 Erection of the switchgearat site 26

5.1 General site requirements 26

5.2 Construction data 26

5.3 Fundamental notes onerection work 27

5.4 Foundation frame 27

5.5 Raised false floor 27

5.6 Erection and connectionof the panels 27

5.6.1 Preparatory work 27

5.6.2 Erection of the switchgear 27

5.7 Connection of cables and wiring 38

5.7.1 High voltage XLPE cableswith plug-in connectors 38

5.7.2 Control cables and wiring 38

5.8 Preparing the insulatinggas system for operation 38

5.9 Final erection work 38

6 Commissioning/operation 39

6.1 Commissioning 39

6.1.1 Preparatory work 39

6.1.2 Initial start-up 39

6.2 Switching operations 39

6.2.1 Circuit-breaker 39

6.2.2 Three-position switch 40

6.2.3 Undervoltage release 40

6.3 Observation of the display andmonitoring facilities 40

5We reserve all rights to this publication. Misuse, particularly including duplication and making available of this manual - orextracts to third parties is prohibited. The information supplied is without liability. Subject to alteration.

ABB Calor Emag Mittelspannung GmbH, 2002

Contents Page

6.3.1 Gas monitoring 40

6.3.2 Electrical/mechanicaldisplay/monitoring 40

6.4 Test procedures 40

6.4.1 Testing for the off-circuit condition 40

6.4.2 Testing for the in-phase condition 41

6.4.3 High voltage tests 41

6.4.4 Maintenance earthing 42

6.5 Application of the X-ray regulations 42

7 Maintenance/disposal 45

7.1 General 45

7.2 Inspection/servicing 45

Contents Page

7.2.1 Vacuum circuit-breaker 46

7.2.2 Three-position switch 46

7.2.3 Gas system and gas servicing 46

7.3 Repair 46

7.3.1 Replacement of circuit-breaker partsand accessories 46

7.3.2 Checking the dimensional accuracyof the settings 46

7.3.3 Touch up of surfaces 46

7.4 Working and auxiliary materials 48

7.4.1 Working materials 48

7.4.2 Auxiliary materials 48

7.5 Disposal 48

61 Summary

1.1 General

Fundamental features of the panels:

rated voltage up to 36 kV (40.5 kV)

three-phase metal-clad

gas-insulated

sealed pressure system for busbar compartment

sealed pressure system for circuit-breaker com-partment

Sensor technology and conventional instrumenttransformers for adaptive measuring

indoor installation

factory-assembled

type-tested

routine tested.

Basic panel variants:

incoming and outgoing feeders

bus sectionalisers/bus riser panels

metering panel.

Panel equipment, variants:

vacuum circuit-breaker

disconnector/earthing switch (three-positionswitch) with functions of:

busbar connection,

disconnection,

earthing.

Details on the technical design and equipment of aswitchgear, such as

technical data,

detailed list of equipment fitted,

detailed circuit diagrams, etc.

are stated in the order documents.

1.2 Standards and specifications

1.2.1 Switchgear production

The panels comply with the following VDE stand-ards and the corresponding IEC publications:

VDE 0670 resp. IEC 62271, 60129, 60298 and60694

VDE 0373 resp. IEC 60376 and 60480.

1.2.2 Installation and operation

The relevant standards are to be observed duringinstallation and operation, in particular:

DIN VDE 0101, Power installations exceedingAC 1 kV,

VDE 0105, Operation of electrical installations

DIN VDE 0141, Earthing systems for specialpower installations with rated voltages above1 kV,

the accident prevention regulations issued bythe appropriate professional bodies,

the safety guidelines for production materials,

the order-related details provided by theswitchgear manufacturer.

1.3 Operating conditions

1.3.1 Normal operating conditions

Designed in accordance with VDE 0670 Part1000,Common specifications for high-voltage andcontrolgear standards and IEC Publication 60694,with the following limit values:

Ambient temperature:

Maximum +40 C

Maximum 24 hour average +35 C

Minimum (corresponding tominus 5 indoor class) 5 C

Site altitude:

1000 m above sea level

Ambient air:

The ambient air is not to be significantlycontaminated by dust, smoke, corrosive orflammable gases, or salt.

1.3.2 Special operating conditions

Special operating conditions are to be agreed bythe manufacturer and operator. The manufactureris to be consulted in advance about each specialoperating condition:

Site altitude above 1000 m:

The manufacturers specifications are to beobserved.

Increased ambient temperature:

The current carrying capacity is reduced,

Additional cooling facilities for heat dissipationare to be provided.

Climate:

The risk of corrosion or other impairment, e.g.in the control cabinets, is to be avoided inareas:

with high humidity and/or

with major, rapid temperature fluctuations.

Take countermeasures to prevent con-densation phenomena (e.g. provide electricheaters).

72 Technical data

2.1 Panel type ZX1.2

Electrical data IEC Standard ratings Special ratings

Rated voltage kV 12 24 36 Max. operating voltage kV 12 24 36 40.5Rated power frequency withstand voltage kV 28 50 1) 70 1) 85Rated lightning impulse withstand voltage kV 75 125 1) 170 1) 185 1)

All voltages quotes apply to an insulatinggas pressurte, absolute, at 20C, of kPa 2) 100 100 100 120Rated frequency5) Hz 50 50 50 50Rated current of busbars5) A 2000 2000 2000 2000Rated current of tee-offs5) A 2000 2000 2000 2000Rated peak withstand current kA 80 80 80 80Rated short time current 3s kA 31.5 31.5 31.5 31.5Rated short-circuit breaking current ofthe circuit-breaker kA 31.5 31.5 3) 31.5 3) 31.5 3)

Rated short-circuit making current ofthe circuit-breaker kA 80 80 80 80Rated operating sequence O - 0.3s - CO - 3 min - CO 4)

Total opening time ms ca. 40...55 ca. 40...55 ca. 40...55 ca. 40...55Closing time ms ca. 60 ca. 60 ca. 60 ca. 60

Insulating gas systemInsulating gas SF6 6) SF6 6) SF6 6) SF6 6)

Design pressure, absolute kPa 147 147 147 147Operating pressure, absolute, 20C(equals filling pressure) kPa 130 130 130 130Rated pressure, absolute, 20C(minimum operating pressure) kPa 120 120 120 120

Motor- and release dataCharging motor W 150 150 150 150Closing coil W 250 250 250 250Opening coil W 250 250 250 250

Rated supply voltageDC V 60, 110, 220 7)

Degree of protection(IEC 60529, DIN VDE 0470-1)High voltage live parts IP 65 IP 65 IP 65 IP 65Control cabinet IP 4X 8) IP 4X 8) IP 4X 8) IP 4X 8)

Ambient temperature:Maximum value C +40 +40 +40 +40Maximum value of 24-h-mean C +35 +35 +35 +35Minimum value C -5 -5 -5 -5Altitude for erection above sea level 9) m 1000 1000 1000 1000

Dimensions

Hight (for transport) mm 2100 10) 2100 10) 2100 10) 2100 10)

Depth 11) 13) mm 1300 1800 1300 1800 1300 1800 1300 1800Width 1250 A, 31.5 kA mm 600 800 3) 800 3) 12) 800 3) 12)

> 1250 A mm 800 800 800 800Height of cable fixing mm 1250 1250 1250 1250

1) Higher values in accordance with international standards on request2) 100 kPa = 1 bar3) 600 mm panel width up to 25 kA rated short-circuit breaking current4) Other operating sequence on request5) Rated current 60 Hz on request6) Insulating gas: Sulphur hexafluorid SF67) Other voltages on request8) Other degrees on request9) Higher altitude for erection on request10) See figures 2/1 to 2/4 for total height including plasma diverter or pressure relief ducts11) Dependent on the number of cables per phase12) With plug-in voltage transformer, panel width 800 mm13) As an option, with conventional control systems, the panel depth can be extended by 100 mm

(see notes to figures 5/10 and 5/12)

8Test voltages IEC Standard ratings Special ratings

Rated voltage kV 12 24 36

Max. operating voltage kV 12 24 36 40.5

Rated power frequency withstandvoltage across the isolating distance kV 32 60 80 1)

Rated lightning impulse withstandvoltage across the isolating distance kV 85 145 195 1)

Insulating gas system 2)

Insulating gas SF6 3) SF6 3) SF6 3) SF6 3)

Operating pressure, absolute, 20C(equals filling pressure) 4) kPa 130 130 130 130

Operating pressure, absolute, 20(minimum operating pressure) 4) kPa 120 120 120 120

1) Data on request2) For further details see BA 427/E

insulating gas system for ZX switchgear3) Insulating gas: sulphur hexafluoride, SF64) 100 kPa = 1 bar

Rated voltage 12 24/361) 12/24/361)

Panel width mm 600 600 (800) 800

Test current

Rated current A ... 1250 1250 2000

Rated peak withstand current kA 80 63 (80) 80

Rated short time current, 3s kA 31.5 ...25 (31.5) 31.5

Motor data

Motor power, max.2) W 180 180 180

Motor running times, max.2):

Centre position to busbar s 18 18 20

Centre position to earth s 18 18 20

Rated supply voltage

DC 3) V 60, 110, 220

1) Higher values on request2) At rated supply voltage3) Other voltages on request

2.2 Busbar compartment withdisconnector/earthing switch (three-position switch) type UX2TE

9a) Busbar riser or busbarsectionalizer

b) Incoming feeder panel up to4 cables per phase

1250/1450

2640

View X

800

ZX1.2

E

X

2100 23

70

G

View Y

2100 2

370 26

40

800

ZX1.2

E

G

Y

Y

1250

1250

G

E

G

E

1800

B

F

D

A

CB

F

D

A

50

Figure 2/1: DimensionsFigure shows panels with rated current 1250A

A Circuit-breaker compartmentB Busbar compartmentC Cable termination compartmentD Control cabinetE Pressure relief duct, above (optional)

a) Feeder panel: 1 cable per phase b) Feeder panel: up to 2 cables per phase

G

E

A

CB

F

D

50

50

I

250

View X

600

Y

n panels

ZX1.2

2100

View Y

X

H

600

2100 2

370

1250

2640

E

G

E

1250

ZX1.2

1300

50

1500

A

CB

F

D

Figure 2/2: DimensionsFigure shows panels with rated currents 1250 A

A Circuit-breaker compartmentB Busbar compartmentC Cable termination compartmentD Control cabinet

2.3 Dimensions and weights

F Pressure relief duct for busbar compartmentG Pressure relief duct with absorber (optional)H End coverI Pressure relief chimney, lateral (optional)

E Pressure relief duct , above (optional)F Pressure relief duct for busbar compartmentG Pressure relief duct with absorber (optional)

Busbar Depth WidthA mm mm

Sectionalizer 1250 1250/1450 600/800Riser 1250 1250/1450 600/800Sectionalizer > 1250 1450 800Riser > 1250 1450 800

10

Figure 2/3: DimensionsFigure shows panels with rated current 1250 A, equipped with plasma diverter.Cable connection department C is not covered to the rear side.

A Circuit-breaker compartmentB Busbar compartmentC Cable termination compartmentD Control cabinet

Figure 2/4: DimensionsFigure shows panels with rated currents 1250 A, equipped with plasma diverter L.Cable connection department C is not covered to the rear side.

A Circuit-breaker compartmentB Busbar compartmentC Cable termination compartment

a) Feeder panel: 1 cable per phase b) Feeder panel: up to 2 cables per phase

a) Busbar riser or busbarsectionalizer

b) Incoming feeder panel up to 4 cablesper phase

F Pressure relief duct for busbar compartmentH End coverL Plasma diverter (standard)

D Control cabinetF Pressure relief duct for busbar compartmentL Plasma diverter (standard)

L

A

CB

F

L

50

50

View X

600

Y

n panels

ZX1.2

2100

View Y

X

H

600

2100 2

275

1250

1250

ZX1.2

1300

50

1500

A

CB

F

D

50

H

D

F

LL

2275

View X

800

ZX1.2

X

2100

View Y

2100

800

ZX1.2

Y

Y

1250

1250

1250/1450 1800

B

F

D

A

CB

D

A

50

2275

Busbar Depth WidthA mm mm

Sectionalizer 1250 1250/1450 600/800Riser 1250 1250/1450 600/800Sectionalizer > 1250 1450 800Riser > 1250 1450 800

11

Weights:

Weight of a standard panel:

Panel width 600mm, Panel depth 1300 mm: ca. 600 kg

Panel width 600mm, Panel depth 1500 mm: ca. 650 kg

Panel width 800mm, Panel depth 1300 mm: according to equipment installed



2.4 Resistance to internal arc faults

Resistance to internal arc faults

Panel width

600 mm 800 mm

Circuit-breaker compartment/ 31.5 kA, 1s 31.5 kA, 1sBusbar compartment

Cable connection compartment not relevant not relevant

Criteria 1 - 6 of PEHLA directive no. 4 (inconjunction with VDE 0670, Part 6, AppendixAA and IEC 60298, Appendix AA) are fulfilled.

The panels can have optionally integratedpressure relief ducts with the opportunity for:

conducting out of the switchroom in amanner suitable for the building dimensions,or

conducting through an absorber on the lasttwo panels (when the ceiling height issufficient).

When plasma diverters are used (standard), thearc gases are conducted to the rear

panel by panel for the circuit-breaker com-partment, and

centrally via a pressure relief duct (F), (seepage 9 and 10), from the busbar compart-ments to a metering panel or sectionalizerpanel. If the installation does not contain ametering panel or sectionalizer panel, anoutgoing feeder panel can be used forpressure relief.

In the case of an arc fault, an increase ofpressure in the switchroom is to be expected.This is to be taken into account in the planning.Calculations can be supplied on request.

12

3 Design and function of the switch-gear system and its equipment

3.1 Design and equipment of the panels

(Figures 3/1 to 3/11)

The circuit-breaker and busbar compartments ofthe metal-clad panels of type ZX1.2 are manu-factured in a laser cutting and welding process.

The stainless steel encapsulation and the insulatinggas protect all live parts in the high voltage areapermanently from soiling, humidity, foreign bodiesand other injurious influences.

With the segregation of the switching devices intomaintenance-free components in the insulating gascompartment and accessible, low maintenanceoperating mechanism components in the low volt-age bay, the ZX1.2 switchgear fulfils requirementsof IEC 60694 for sealed pressure system.

The modular structure provides the conditionsnecessary for all panel variants normally required ina relatively simple manner.

For example:

Feeder panel,

Busbar sectionalizer panel/busbar riser panel,

Metering panel,

different connection methods, such as multiplecables,

solid insulated bar.

Pressure relief:

There are facilities for pressure relief either panelby panel or via pressure relief ducts.

In the unlikely event of an internal arc fault, therelevant pressure relief disks open.

Circuit-breaker compartment (1.0)

Pressure relief is effected via a pressure reliefdisk 1.3 fitted at the top:

Standard: relief to the rear by means of aplasma deverter (1.15) (panel by panelpressure relief).

Optional: discharge into a pressure reliefduct (1.9) and from there via an absorber(1.10) into the switchroom or without anabsorber for direct relief to the outside.

Busbar compartment (2.0)

Pressure relief is effected via a pressure reliefdisk (2.11) fitted at the bottom into thepressure relief duct (3.6).

In systems with pressure relief to the rear(standard), discharge is effected centrallyvia the pressure relief duct (3.6) into asectionalizer panel / busbar riser panel ormetering panel. There, flap 3.15 opens.

Optionally, in systems with pressure reliefducts at the top, the plasma gases aredischarged through the lower pressurerelief duct (3.6) to the side pressure reliefchimney (I) (refer to page 9) and into theupper pressure relief duct (1.9).

Cable termination compartment (3.0)

In systems without covers and cell par-titioning, the plasma gases escape into thespace behind the switchgear (standard).

In systems with rear covers and cell par-titioning at the sides, internal arcing in thecable termination compartment causes aflap (3.5) leading to the lower pressure reliefduct (3.6) to open. From there, the gasesare channelled through the side pressurerelief chimney into the upper duct (1.9).

Each panel is a self-contained unit whosebusbars (2.4) are connected to the busbars inthe adjacent panels by plug-in busbarconnectors (2.5).

Equipment in the panels

Circuit-breaker VD4X

Three position switch UX2TE

Circuit-breaker compartment (1.0)

with or without current transformers

with or without combination sensors

Busbar compartment (2.0)

Cable termination compartment (3.0)

without current transformers

with conventional ring core current trans-formers (customized)

with current sensors (At present only possiblewith one cable per phase. The sensors mustbe installed before the plugs are fitted.)

Control cabinet, optionally equipped with:

bay control and protection unit REF542 plus

bay control unit CC in conjunction with pro-tection relays

mechanical auxiliary switches in conjunctionwith protection relays

Cable and test plug sockets

Switchable sockets for plug-in voltage trans-formers (optional)

Insulation test criteria

The insulation test criteria of VDE and IEC list 2 arefulfilled by the ZX1.2 standard series up to andincluding 36 kV even when the gas filling isat atmospheric pressure. The special series for40.5 kV fulfils the insulation test criteria at a gaspressure of 120 kPa absolute at 20C.

13

3.2 Gas system in the panels/switchgear


A permanently protected climate for the entire live pri-mary area is ensured by the gas-tight encapsulationof the panels and their filling with dry insulating gas.

The circuit-breaker compartment (1.0) and thebusbar compartment (2.0) in each panel areseparate gas compartments with their own fillingconnectors. The gas compartments in theindividual panels set up side by side are notconnected together.

Details on the gas system and gas servicing ofthe ZX1.2 switchgear can be found in instructionmanual BA 427/E Insulating gas system for ZXswitchgear.

The gas compartments contain drying agentbags.

Further details on the drying agent material canbe found in instruction manual BA 427/E.

3.2.1 Monitoring of operating pressure

The operating pressure (equals filling pressure) inthe individual compartments is monitored bytemperature compensated pressure sensors:

Pressure sensor (1.8) for the circuit-breakercompartment,

Pressure sensor (2.3) for the busbar compart-ment.

When the pressure in a gas compartmentdecreases below rated pressure (minimumoperating pressure), this is detected anddisplayed on LEDs by the REF542 plus.

As an alternative, in versions without the baycontrol and protection unit REF542 plus, ashortfall below the minimum operating pressureis displayed by signal lamps.

A pressure drop below the minimum operatingpressure in a gas compartment is signalledselectively by LED terminals in the controlcabinet.

3.2.2 Limitation of the effects of an internal arc fault

In the unlikely event of an internal arc fault, acontact in the gas density sensor opens a loopcircuit which runs through all the panels in a busbarsection. On detection of overcurrent at the sametime, the REF542 plus opens the correspondingcircuit-breaker.

Observe the details in the order documents.

3.3 Vacuum circuit-breakers, type VD4 X(Figures 3/3, 3/7, 6/4 and separate manualBA 463/E)

Functions of the vacuum circuit-breaker (1.1):

opening and closing on rated currents,

short-circuit breaking operations,

earthing function in conjunction with three-posi-tion switch (2.1).

The earthing function of the three-position switchprepares de-energized for the connection toearth. Earthing proper is performed by the circuit-breaker. This integration of functions is advant-ageous, as a circuit-breaker is of higher quality in theearthing function than any other earthing switch. Thecircuit-breaker poles are installed horizontally in thecircuit-breaker compartment (1.0). The circuit-breaker operating mechanism (1.2) is locatedoutside the gas compartment and is thereforeeasily accessible. It is connected to the breakerpoles by a gas-tight bushing.

3.4 Disconnector/earthing switch, type UX2TE(Three-position switch)

(Figures 3/7, 6/3 and 6/5)

The ZX1.2 panels are fitted with specially designedthree-position disconnectors and earthing switches(2.1) (-Q1/-Q5). These switches are motor-operatedrod-type switches whose live switching componentsare located in busbar compartment (2.0) (insulatinggas compartment), while the operating mechanismblock is easily accessible from the control cabinet(4.0).

The operating mechanism block contains the drivemotor, the position indicators (sensors andmechanical indicators) and the emergency manualoperating system.

The three-position switch performs the functions of:

connecting,

disconnecting and

earthing.

The three switch positions are unequivocally speci-fied by the operating mechanism. The switch has itsdisconnecting position at the centre. In the limit posi-tions, disconnector ON and earthing switch ON, themoving contact (sliding part) driven by an insulatingspindle, reaches the isolating contacts, which arefitted with one or two contact rings respectively.

3.5 High voltage connections

(Figures 3/2, 3/7, 5/8 and 6/6)

Cable plug connector systems:

High voltage plastic insulated cable with internalcone cable plug connector system and socketsto DIN 47637.

Plug systems: size 2 or 3.

Plug-in cable sockets (1.7) mounted in a gas-tight manner in the floor plate of the circuit-breaker compartment maintain the partitioningbetween the insulating gas compartment andthe cable termination compartment. Theconnection height for the cables is 1250 mm.

14

Test socket (1.4): plug system size 2.

Solid-insulated busbar system: Connection of asolid-insulated bar by sockets acc. to DIN 47637size 3 or plug-in busbar sockets.

Observe the details in the order documents.

3.6 Control and monitoring

by digital secondary systems with bay control andprotection unit REF542 plus or bay control unit CC.

(Figures 3/4, 3/7, 6/1, 6/5 and 6/6)

Sensors detect actual operating conditions. Theirinformation is then processed by the combinationunit REF542 plus or the bay control unit CC. Furtherdetails on the REF542 plus and the CC can befound in the relevant separate instruction manuals(see section 7.1).

The following sensors are used in ZX1.2 panels:

Sensors for insulating gas pressure monitoring

Sensors to detect the switch positions of thecircuit-breaker and disconnector/earthingswitch (three position switch)

Sensor to detect the charging condition of thecircuit-breaker stored energy spring.

Arrangement of the sensors:

Sensors for pressure monitoring:

(B0G) for the circuit-breaker compartment:on the circuit-breaker base plate in the controlcabinet.

(B1G) for the busbar compartment:beside the operating mechanism for thedisconnector/earthing switch (three positionswitch) -Q1/-Q5 in the control cabinet.

Sensors for detection of the switch positions:

(B0E) and (B0A) for the circuit-breaker:on its operating shaft.

(B1E, B1A, B5E and B5A) for thedisconnector/earthing switch (three positionswitch):on its operating mechanism in the controlcabinet.

Sensor B0S of the charging condition of thestored energy spring: located above the drumwith the spiral spring for the circuit-breakeroperating mechanism.

3.6.1 Bay control and protection unit REF542 plus

(Figures 3/1, 3/3, 3/4, 3/7 and 6/1)The following functions are integrated in the baycontrol and protection unit REF542 plus:

Protection

Control

Measurement

Switch position indication

Hazard and fault signalling

Connection to automation systems

Panel interlocks and the sequence of switchingoperations are controlled by the bay control andprotection unit.

The single line diagram providing information onswitching device positions is made visible on the LCdisplay on the control unit of the REF542 plus (4.2).

Measured values such as conductor currents,conductor voltages, energy metering and activeand reactive power, number of operating cyclesand number of operating hours appear numericallyand/or as a bar diagram on the display. Furtherinformation, such as alarm and fault signals, isdisplayed with text by LEDs (4.6).

The bay control and protection unit REF542 pluscan be connected to an automation system viafibre-optic cables. Electromagnetic interference isavoided by the use of optical waveguides.

Please refer to the REF542 plus instruction manualfor details on handling of the bay control andprotection unit and a detailed technical description(see section 7.1).

3.6.2 Bay control unit CC (optional)

The following functions are integrated in the baycontrol unit CC:

Control

Switch position indication via mechanicalcontacts

Fault signalling

Connection to remote control or automationsystems

Protection against maloperation and thesequence of switching operations are controlledby the bay control unit CC.

Information on switching device positions can bemade visible on display units.

Floating contacts are available for further signals.

Please refer to the CC instruction manual BA456/E for details on handling and a detailedtechnical description of the bay control unit CC.

3.7 Conventional secondary systems incombination with a protection device

The conventional version of the ZX1.2 hasmicroswitches on the operating mechanism baseplate for detection of the position of the threeposition switch (2.1). These are used to start andstop the relevant drive motor (disconnector orearthing switch). These microswitches arepositioned in such a way as to detect the limitpositions of the three position switch.

15

5 pole sets of positively driven auxiliary switches areavailable for each of the positions

earthing switch ON

earthing switch OFF and disconnector OFF

disconnector ON.

Three (four) of the five contacts of the auxiliaryswitch are pre-assigned for internal purposeswithin the panel, such as circuit-breakerinterlocking or local position indication.

As an option, the following mechanical interlock isavailable between the circuit-breaker (-Q0) and thethree position switch (-Q1/-Q5). With the circuit-breaker closed, the access flap (2.22) to theactuating shaft of the three position switch isblocked. If the circuit-breaker is open, this flap canbe opened and a hand crank (6.1) inserted foroperation of the disconnector or earthing switch.When flap (2.22) is open, electrical and mechanicalswitching of the circuit-breaker are prevented.

The flap (2.22) for the three position switch can onlybe closed when the switch is in one of the limitpositions

earthing switch ON

earthing switch OFF and disconnector OFF

disconnector ON.

The circuit-breaker is only enabled again when flap(2.22) is closed.

3.7.1 Conventional control

The ZX1.2 variant with a conventional controlsystem has the following features:

Mimic diagram with bar-type annunciators forposition signalling on the door of the controlcabinet.

Push buttons for operation of the circuit-breaker(1.1) and the three position switch (2.1).

Drop indicator relays for signalling of switch andmcb tripping.

Starting and stopping of the operatingmechanisms by microswitches in combinationwith motor control relays.

Electrical interlocks between the circuit-breaker(1.1) and the three position switch (2.1).

Floating contacts for position signalling forcustomized applications (e.g. remote signallingor interlocking of the opposing side).

3.8 Protection against maloperation / interlockdependencies

(Figures 6/3, 6/5 and 7/1)

3.8.1 Interlocks in general

In order to prevent hazardous situations andmaloperation, a series of interlocks are provided toprotect the operators and the switchgear itself.

Protection against maloperation can be imple-mented by the following two devices:

- Bay control and protection unit REF542 plus

or

- Bay control unit CC.

The circuit-breaker and three position switch canbe controlled directly at the panel and/or remotely,for instance from the control room. Operation at thepanel is by selection on the REF542 plus orconventionally with push buttons and bar-typeannunciators in the mimic diagram.

Three position switch UX2TE and thecorresponding circuit-breaker type VD4X areelectrically interlocked.

In the case of manual operation of the threeposition switch, a mechanical interlock canbecome effective (optional).

Details of further interlocks/dependencies, e.g.with neighbouring systems, can be found in therelevant order documents for the systemconcerned.

The interlock polling (electrical only) betweenpanels, where implemented, is effected by looplines from panel to panel.

Operation on failure of auxiliary power:

On failure of the auxiliary power, the devices can beoperated manually.

The details for the specific system are also to beobserved.

Emergency manual operation:

Where no mechanical interlock or optional interlockis fitted, intervention in the interlock concept ispossible by opening the control cabinet door.Emergency manual operation is possible by meansof a hand crank and mechanical push button.

Note:

Perform all switching operations fully until thedefined limit position is reached!

3.8.2 Function of the interlock between the circuit-breaker and the three-position switch

a) Electrical interlock

The electrical interlock is achieved by polling andlogical operations on the positions of the threeposition switch and the circuit-breaker.

This interlock is always effective when auxiliaryvoltage is applied.

16

b) Mechanical interlock (optional)

The mechanical interlock only permits access tothe manual operating shaft of the three positionswitch under certain conditions.

A flap (2.22) in front of the shaft can only beopened when the circuit-breaker is off.

Do not use force!

The three position switch can be moved by approx.24 turns of the corresponding hand crank (6.1)either from the

disconnector ON position into the

disconnector OFF / earthing switch OFF position,or from the

earthing switch ON position into the

earthing switch OFF / disconnector OFF position.

A cam on the hand crank acting together with a pin onthe operating mechanism prevent the mechanismfrom overrunning the centre position.

If the hand crank is withdrawn in an intermediateposition, the flap (2.22) in front of the manualoperating shaft cannot be closed. In this position,the circuit-breaker remains blocked and cannot beclosed.

This intermediate position can be detected on theone hand by the lack of a mechanical limit positionindication for the three position switch, and on theother hand electrically at the indicators on the frontdoor.

The limit positions are only correctly displayedwhen they have actually been reached, i.e. whenthe contacts have their full current carryingcapacity. Flap (2.22) can then be closed and thecircuit-breaker switched on.

In reverse, the flap can always be opened when thecircuit-breaker is off, even in an intermediateposition, allowing the hand crank to be fitted.

The details of the individual system ordered arealso to be observed.

Note:

If the disconnector operating mechanism shouldfail during a switching operation with thedisconnector in an intermediate position, theelectrical interlock between the circuit-breaker typeVD4X and the three position switch type UX2TEestablished by the REF542 plus or CC is effective.The VD4X circuit-breaker could however be closedmechanically if the control cabinet door is open.Even the optional mechanical interlock does notprevent this possibility.

3.9 Earthing a tee-off

3.9.1 Electrical operation using the bay control andprotection unit REF542 plus or push buttons onthe panel front

Operating sequence for tee-off earthing:

Circuit-breaker (-Q0) OFF.

Disconnector (-Q1) OFF.

Earthing switch (-Q5) ON.

Test for off-circuit condition.

Circuit-breaker (-Q0) ON.

Secure panel to prevent reconnection.

M.c.b.s (F101) and (F106) OFF.

Lock the control cabinet door or secure themechanical OFF button for the circuit-breakerif necessary.

Label the panel to indicate that earthing hasbeen effected.

Cancelling the earthing:

Open the control cabinet door and switch on them.c.b.s. Release the OFF button for the circuit-breaker if necessary.


Earthing switch (-Q5) OFF.

3.9.2 Manual earthing

Follow the same sequence as for electricaloperation, but using the manual push buttons forthe circuit-breaker and the crank to operate thethree position switch.

When an additional mechanical interlock betweenthe circuit-breaker and the earthing switch is fitted,the following actions are necessary:

Open the control cabinet door.

Switch off the circuit-breaker (-Q0) by operatingthe mechanical push button.

Open flap (2.22) on the three position switchoperating mechanism (see Interlocks, section3.8.2b).

Note:

Flap (2.22) can only be opened when the circuit-breaker is OFF.

Do not use force!

Switch off the disconnector (-Q1) with the handcrank.

Switch on the earthing switch (-Q5) manuallyusing the hand crank (6.1). (Note: ObserveEmergency manual operation in section 6.2.2).24 turns clockwise.

Close flap (2.22) again.

17

Note:

When flap (2.22) is open, the circuit-breaker isblocked in the OFF position.

Test for the off-circuit condition (capacitivevoltage indicator system, see section 6.4.1).

Switch the circuit-breaker (-Q0) on using themechanical ON push button.

Secure the panel to prevent switching operations:m.c.b.s (F101 and F106) OFF.

Lock the control cabinet door or secure themechanical OFF button for the circuit-breaker ifnecessary.


Cancelling the earthing manually:

Open the control cabinet door and switch on them.c.b.s. Release the OFF button for the circuit-breaker if necessary.

Switch circuit-breaker (-Q0) OFF with the mech-anical push button.

Open flap (2.22).

Switch earthing switch (-Q5) OFF manually.

Close flap (2.22).

3.10 Earthing the busbar

The procedure for earthing the busbar or a busbarsection is dependent on the configuration of thesystem. Systems with sectionalizers/risers permitearthing of a busbar section without additionalequipment.

3.10.1 Electrical earthing of a busbar section using thesectionalizer/riser

Operating sequence:

Circuit-breaker in the sectionalizer panel OFF.

All disconnectors in the busbar section to beearthed OFF, apart from the disconnector (-Q11or -Q12) between the busbar section to beearthed and the sectionalizer breaker.

Switch earthing switch (-Q52 or -Q51) on theopposite side of the sectionalizer breaker ON(condition for release for the following step).

Sectionalizer breaker (-Q0) ON (testing for theoff-circuit condition is replaced by closing thecircuit-breaker).

Secure the panel to prevent switchingoperations.


Lock the control cabinet door or secure themechanical OFF button for the circuit-breakerif necessary.


The busbar section is then earthed. All the panels inthe section concerned are to be secured to preventswitching operations, e.g. by tripping the mcbs.

Cancelling the busbar earthing:

Open the control cabinet door in the sectionalizerand switch on the m.c.b.s. Release the OFFbutton for the circuit-breaker if necessary.


Earthing switch (-Q51 or -Q52) OFF.

3.10.2 Manual earthing of a busbar section using thesectionalizer/riser

Perform the switching operations as described insections 3.9.2 and 3.10.1 accordingly.

3.10.3 Maintenance earthing of a busbar using the testsockets in a tee-off

Condition:

The tee-off is earthed (see section 3.9).

All disconnectors in the busbar to be earthedare OFF.

Operating sequence:

Fit a short-circuiting bridge to the test socketsfor the earthed tee-off and connect to mainearthing bar (3.1).

Circuit-breaker OFF.

Earthing switch OFF.

Disconnector ON.

Circuit-breaker ON.

Secure the panel to prevent switchingoperations.


Lock the control cabinet door or secure theOFF button for the circuit-breaker ifnecessary.

Label the busbar to indicate that earthing hasbeen effected.

The busbar is then earthed. All the panels affectedare to be secured to prevent switching operations,e.g. by tripping the m.c.b.s.

Cancelling the busbar earthing:

Open the control cabinet door for the outgoingfeeder and switch the m.c.b.s on, if necessaryreleasing the OFF switch for the circuit-breaker.


Disconnector OFF.

Cancelling the tee-off earthing:

Earthing switch ON.

Circuit-breaker ON.

18

Remove the short-circuiting bridge from the testsockets and close the sockets off with blankingplugs.

Circuit-breaker OFF.

Earthing switch OFF.

3.11 Test facilities

The panels are properly filled with insulating gas atthe works and tested to the VDE or IEC standards.

Should there be any need to perform tests, thetests are to be performed as follows:

For voltage and current tests, direct access tothe conductors in the connection area is possi-ble without removing the cable connection orextracting the insulating gas. Access is effectedvia the test sockets (1.4).

Surge arresters must be removed during voltagetesting. The exposed sockets must be closed offby blanking plugs during the tests!

Voltage transformers must be isolated from the testcircuit prior to testing.

Voltage tests:

Close off and insulate free cable sockets withblanking plugs!

See section 6.4 for further details and theapplicable test voltages.

Perform cable tests with DC voltage or withvery low frequency (VLF) cosine or squarewave voltage.

Cable fault location measurements withimpulse voltage and

switchgear tests (without cables) with ACvoltage can be performed with a test plug asshown in figure 6/7. (Test cables are to beused for tests on the 36 kV variant.)

A test plug for current tests as shown in figure (6/8)can be used to test the protection devices byprimary current injection (see also the note insection 6.4.4). This configuration is short-circuitproof and can also be used as an additionalmaintenance earth.

The possible testing processes are described in thefollowing sections:

Testing for the off-circuitcondition: Section 6.4.1

Testing for the in-phasecondition: Section 6.4.2

High voltage tests: Section 6.4.3

Maintenance earthing: Section 6.4.4.

19

Figure 3/1: Panel type ZX1.2, front view with bay control andprotection unit REF542 plus, measuring sockets forcapacitive voltage indicator system at front (optional),with pressure relief duct at top (optional), (assemblyopening on circuit-breaker compartment irrelevant).

Figure 3/2: Panel type ZX1.2, rear view.Connection of two cables per phase

Figure 3/3: Panel type ZX1.2, front view.Shown without low voltage compartment door, with aview into the low voltage compartment

1.9

4.0

1.17

1.0

2.0

2.5

1.16

1.5

1.6

3.7

20

Figure 3/4: Bay control and protection unit REF542 plus

Figure 3/5: Panel top, pressure relief disk on the circuit-breakercompartment

Before installation of a pressure relief duct or plasmadiverter

Figure 3/6: Panel top, pressure relief disk on the circuit-breakercompartment.

Shown with plasma diverter

1.3

4.7 4.6 4.2

1.15

21

Figure 3/7: Feeder panel type ZX1.2,Shown with pressure relief duct and plasma diverter(optional)

Figure 3/8: Outgoing feeder panel type ZX1.2, with 2 parallel cables,basic structure shown with plasma diverter fordischarge of the plasma gases to the rear of the system

(See item 3/7 for symbols)

ZX1.2

-Q1/Q5

-Q0

-C1 -C2

-T13.2

1.31.1

1.51.41.61.73.42.13.1

5.1

3.5

4.04.31.84.21.2

4.52.32.2

4.12.102.52.42.112.12

1.9

1.10

3.3

1.0

3.0

3.7

1.11

1.12

4.42.0

3.6

ZX1.2

-Q1/Q5

-Q0

-C1 -C2

-T13.2

5.35.4

1.51.41.61.73.42.13.1

3.14

3.5

4.04.31.84.21.2

4.52.32.2

4.12.102.52.42.11

2.12

1.0

1.15

1.1

3.0

3.7

1.11

1.12

4.42.0

3.6

1.3

Insulating gas

-Q0 Circuit-breaker

-Q1 Tee-off disconnector

-Q5 Tee-off earthing switch

-T1 Current transformer

-C1 Capacitive voltage divider

-C2 Capacitive voltage divider, optional

22

Figure 3/9: Busbar coupler with circuit-breaker and three positionswitch

Figure 3/10: Busbar riser with three position switch

ZX1.2

-Q0

-Q11/Q52

3.15

3.2

2.52.4

1.311.1

2.1

3.1

4.04.31.84.21.2

4.52.32.2

4.12.102.52.42.11

3.13

1.31.9

1.11

1.12

4.42.0

3.6

ZX1.2

-Q12/Q51

1.9

3.13

3.15

3.2

2.4

2.1

3.1

4.04.31.8

2.32.2

2.102.52.42.11

1.32

1.12

4.4

2.02.24

2.5

1.14

3.6

-Q0 Circuit-breaker





23

Figure 3/11: Busbar metering panel with plug-in voltagetransformers.Voltage transformers earthed after isolation.Disconnecting device (2.9) only to be used when thebusbar is off-circuit.Always perform the switching operation fully to the limitposition.

ZX1.2

3.15 3.6

2.9

2.8

5.2

4.3

4.0

4.4

2.62.52.42.11

3.13.2

2.7

2.34

2.3

2.24

24

4 Despatch and storage

4.1 Condition on delivery

The factory-assembled panels are checked forproper assembly and function.

Condition on delivery:

Compliance of the equipment with the orderchecked.

Routine testing to VDE 0670 Part 6 or ICE 60298performed.

Installation material and accessories packagedseparately.

Bushings for the busbars closed off with non-surge-proof transport covers.

Condition of the gas compartments:

Filled with insulating gas at the operatingpressure,

Fitted with drying agent bags.

Note:

Air freight is to be discussed and agreed inindividual cases.

4.2 Packaging

Panels with basic packaging or withoutpackaging.

Panels with seaworthy or similar packaging (alsocontainerised for overseas transport):

sealed in polythene sheeting,

transport drying agent bags inserted,

moisture indicators inserted,

sight window fitted for checking of theindicator when AL composite sheeting is used(optional).

Observe the directions for the drying agent bagsto DIN 55 473. The following applies:

Coloured indicator blue: contents dry.

Coloured indicator pink: contents moist (e.g.relative humidity over 40%).

4.3 Transport(Figure 4/1)

Note:

Do not walk on the tops of the panels (pressurerelief system!).

The transport units are normally individualpanels.

Take account of the weights of the transportunits.

Take account of the high centre of gravity.Danger of tipping!

Handle the panels in the upright position.

Only perform loading operations taking accountof all safety precautions to protect personnel andthe material transported with: a crane, and/or

fork-lift truck.Safety note:

Handling by crane: Attach suspension ropes of a sufficient load

bearing capacity with shackles (opening angle 30 mm).

Use edge guard (1.19) on the top edge of thepanel.

Bolt on handling brackets (1.8) (if not alreadyfitted).

Handling by fork-lift truck:

The panel must be fully supported on the forks ofthe lift truck. The high centre of gravity meansthat there is a great risk of tipping. On no accountshould handling be jerky or violent.

Handling in the switchgear room can be effectedby a trolley with steerable wheels. As withhandling by fork-lift truck, take account of thehigh centre of gravity of the panels. Danger oftipping!

4.4 Delivery

The responsibilities of the consignee include but arenot limited to:

Checking the delivery for completeness andfreedom from damage (e.g. also for moisture andits injurious effects).

Any deficiencies/transport damage noted

are to be documented on the waybill, reported to the shipper/carrier in accordance

with the ADSP or KVO liability conditions forGerman insurance.

Note:

Always document major damage with photo-graphs.

4.5 Intermediate storage

Conditions for optimum intermediate storage:

1. Panels with basic packaging or without packaging.

Dry and well ventilated storage room. Climatein accordance with VDE 0670 Part 1000/IEC 60694.

Room temperature not falling below -5C.

No other injurious environmental influences. Store the panels upright.

Do not stack panels. Panels with basic packaging:

open the packaging at least partially. Panels without packaging:

loosely cover with protective sheeting. sufficient air circulation must be preserved.

Check regularly for any condensation.

25

Figure 4/1: Preparation for handling by crane.

Handling bracket (1.18) to be removed after handling

a) Feeder panel with low circuit-breaker compartment b) Feeder panel with high circuit-breaker compartment

> 60

1.19

1.18

1.23

> 601.19

1.18

1.23

2. Panels with seaworthy or similar packaging withinternal protective sheeting:

Store the transport units:

protected from the weather,

in a dry place,

protected from damage.

Check the packaging for damage.

Check the drying agent (see section 4.2):

on delivery,

later at appropriate intervals.

When the service life from the date ofpackaging has been exceeded (depending onthe project):

the protective effect of the packaging is nolonger ensured,

take action for further intermediate storage.

26

5 Erection of the switchgear at siteIn the interests of the best possible erectionsequence, and in order to ensure a high qualitystandard of the panels, local installation of theswitchgear should only be carried out, or at leastresponsibly managed and supervised, by speciallytrained skilled personnel.

5.1 General site requirements

At the start of erection, the switchgear room at sitemust be complete, fitted with lighting and power forthe erection work, lockable, dry, and with goodventilation facilities. All necessary provisions forlaying of the power and control cables such asopenings, ducts, etc. must already be in place.

Compliance with the conditions for indoor switch-gear to DIN VDE 0670 Part 1000 etc., includingthose for the minus 5 indoor temperature class,must be ensured.

5.2 Construction data

Panel width mm 600 600 800Panel depth 1) mm 1300 1500 1300-1800Panel height 2) mm 2100 2100 2100

Ceiling height3) 4): with plasma diverter mm 2800 2800 2800

with pressure relief duct without absorber mm 2600 2600 2600

with absorber mm 2950 2950 2950 with plug-in voltage transformers

at the top mm 27005) 27005) 27005)

Assembly openings3):

in ceilings: width mm 700 700 900length mm 16006) 18006) 1600-21006)

in doors: width mm 1100 1100 1300height mm 2300 2300 2300

Aisle width7):

Inspection aisle mm 700 700 700 Operator aisle mm 1100 1100 1300

Panel weight kg 8) 8) 8)

Floor load kg/m2 8) 8) 8)

1) Depending on the number of cables per phase2) For total height including plasma diverter or pressure relief duct see figures 2/1 to 2/43) Minimum dimensions4) Panel including voltage transformers, plugged-in from above (36 kV panel width = 800 mm)5) Details for system versions with pressure relief duct - leading to the outside.

Otherwise equal the ceiling height, required for panels with pressure relief duct with absorber6) Complies with the panel depth, plus 300 mm7) Governed by DIN VDE 0101 and the data on maximum panel width8) Depending on the equipment installed (data on request)

The ZX1.2 switchgear installations are mounted ona foundation frame set into the screed, or on araised false floor. Floor openings can beproduced either as large openings or as drillholes, depending on the number of high voltagecables.

Openings (drill holes) for power cables in thestation floor are to be constructed so as to beeddy-current free.

27

5.3 Fundamental notes on erection work

DIN-bolts of tensile class 8.8 are to be used.

Recommended

tightening torque1)Nm

Lubricant2)

Thread Without Oil orgrease

M 6 10.5 4 .5M 8 26 10

M 8 3) 12 4 .5M 10 50 20

M 12 86 40M 16 200 80

1) The rated tightening torques for fasteners withoutlubrication are based on a coefficient of friction for thethread of 0.14 (the actual values are subject to anunavoidable, partly not inconsiderable, spread).

Rated tightening torques for fasteners with lubrication inaccordance with DIN 43 673.

2) Thread and head contact surface lubricated.3) These values apply to welded on studbolts only.

Any tightening torques which deviate from those in thegeneral table (e.g. for contact systems or device terminals) areto be taken into account as stated in the detailed technicaldocumentation.

It is recommended that the threads and head contactsurfaces of bolts should be lightly oiled or greased, so as toachieve a precise rated tightening torque.

Remove any dirt from the surfaces in general andfrom insulating material surfaces. Observe thecleaning instructions in Section 7.2.

When handling SF6, avoid any escape of gas intothe switchroom:

ventilate well if leakage occurs.

5.4 Foundation frame

(Figures 5/9, 5/10, 5/11)

Switchgear on a foundation frame:

The relevant data for the order in hand can be foundin the ABB documentation.

The single or multiple panel foundation frame canbe supplied with the switchgear. It is as a rule laidby site personnel and should be aligned andinspected under the supervision of a responsiblespecialist.

The specifications of DIN 43 661 are also to bemaintained when laying the foundation frame,in particular the evenness and straightness tolerancesas a condition for perfect switchgear assembly.

Tolerance conditions for laying of the frame toDIN 43 661, version A:

Evenness tolerance: +/- 1 mm per metre.

Straightness tolerance: max. 1 mm per metre,but max. 2 mm for theentire length of the frame

5.5 Raised false floor

(Figures 5/12, 5/13)

When a raised false floor is used, the manu-facturers installation instructions are to be ob-served. The false floor must satisfy all requirementsspecific to the switchgear installation.

5.6 Erection and connection of the panels


Note:

Do not walk on the top of the panels (rupture pointfor pressure relief system!).

5.6.1 Preparatory work

Grease the upper surfaces of the foundationframe (this facilitates erection and alignment ofthe individual panels).

5.6.2 Erection of the switchgear

Erect the end panel of the switchgear at theprecise position specified on the foundationframe.

Remove the handling bracket (1.18).

Align the panel.

Perform a final check on the aligned position ofthe panel and fasten it to the foundation frame.

Remove the protective caps from the busbarsockets (2.13).

Carefully check insulating parts (2.14) andcontact tubes (2.21) for any dirt, and clean ifnecessary (see also section 7.2).

Note:

Only prepare insulating parts and contact tubes forthe panel currently being erected. Protect themfrom further contamination!

Evenly apply a thin coating of assembly paste APto the conical surfaces A of insulating parts (2.14).

Note:

Leave no ungreased areas on conical surface A.

Carefully insert bus connectors (2.21) and insulatingparts (2.14) into the busbar sockets (2.13).

Slide the adjacent panel carefully and evenly(without tipping) against the erected panel insuch a way that the bus connectors, insulatingparts and guide pins slide into thecorresponding bores without the use of force.

If necessary, align the panel.

28

As soon as the distance between the two panelsis so small that bolts (2.16) can be entered in thebores in the erected panel, insert these, eachwith nuts and dished washers respectively.

Then join the two panels together by tighteningbolts (2.16) crosswise step by step.

Completely bolt the panels together with bolts(1.20), each with dished washers (1.22).

When the panels have been completely joined,check the second panel again for correctalignment and fasten it to the foundation frame.

Dismantle connecting link (3.2) for the mainearthing bar (3.1) in the cable compartment andlead it through to the adjacent panel. Bolt theconnecting link to the main earthing bar withbolts (2.20) and one dished washer at each ofthe bolt head and nut ends.

Check the bolted connection between mainearthing bar (3.1) and the connecting link (3.2) inthe previously erected panel and tightenbolt 2.20 if necessary.

Erect the further panels by following the sameprocedure.

Assembly of the top pressure relief duct and theabsorber can be effected during installation ofthe individual panels or when all panels havebeen joined together.

29

Figure 5/1: Switchgear assembly, see figures 5/2 to 5/4 for details.(Bay control and protection unit REF542 plus not showncompletely)

Figure 5/2: Switchgear assembly,insulating part

On assembly of the busbar, the conical surface A is to beevenly lubricated with assembly paste AP.No areas must be left unlubricated.

2.192.182.16

2.192.182.17

2.192.182.16

3.8

1.20

2.5

1.211.22

1.201.211.22

2.14

Aca. 50 mm

30

Figure 5/3: Switchgear assemblyEarthing bar connection

Figure 5/4: Switchgear assemblyPanel/panel connection

2.18

2.19

3.2

3.1

Panel 1 Panel 2

3.12.20

2.172.19

2.18

2.19

2.18

2.19

2.16

Panel 1 Panel 2

Panel 1 Panel 2

31

Figure 5/5: Busbar connectionBefore assembly the proper position of the contactrings must be checked 1250 A, 1 contact ring> 1250 A, 2 contact rings

Figure 5/6: Assembly of the busbar connection, shown for 1250 A

L1, L3: Protective caps removed L2: Insulating part (2.14) and

bus connector (2.21) fitted

Figure 5/7: Plug connector for single-core XLPE cable

K Cable earthing conductor to be connected toswitchgear earth. Refer to the mounting instruction ofthe supplier.

Figure 5/8: Cable termination compartment, single-core cable(panel side wall cut out)

1.7

3.4

2.13 2.33 2.14 2.21

L1

L2

L3

3.7

3.10

3.11

3.12

3.9

32

Figure 5/9a: Foundation frame unit for two panels

X Frame arrangement, rear, for equal panel depthsY Frame arrangement, rear, for unequal panel depthsZ Frame arrangement, front

A

A

7.6

7.6

7.4

7.1

7.107.20

7.5

7.6

7.3

3(60

)

FT145

300110450753 30

(60)

455

a = n x FT

45

7.107.20

7.7

7.2

7.8

7.6

1216

(with

pane

l dep

th 13

00 m

m)

480(60)600

b

3(60

)

7.1

7.6X Y Z

455

Panel width Foundation frame width a = n x FT

Number of panels n

FT 1 2 3 4

mm mm mm mm

600 mm 600 1200 1800 2400

800 mm 800 1600 2400

Panel Foundation framedepth depth b

mm mm

Feeder panel 1300 1216Feeder panel 1500 1416Feeder panel 1800 1716Metering panel 910 901

33

Figure 5/9b: Foundation frame unit on concrete floor for two panels

When laying the foundation frame in floor topping first tighten screw 7.12.

17 Opening for control cable

18 Opening for power cable

22 Control cabinet

23 Switchgear panel

24 Foundation frame

for metering panel

(Profile: 50x50)

18

38 40...

50

25

21

17 17

30

30 30

20525

50

3850

30

38

2125

30 3020

5

50

17

24

23 22

7.14

7.117.217.30

7.13

ma

x. 5

0m

in. 4

0

3

A-A

30

A-A

7.127.20

7.107.20

7.107.20

34

Figure 5/10: Guideline construction for a foundation frame on aconcrete floorSee figure 5/11 for sections

1) Minimum

2) Dimension for panel width 800 mm. These dimensionsare reduced by 200 mm for a uniform panel width of600 mm.

1 Inspection aisle

2 Operator aisle

3 Basement entrance

4 Platform, approx. 25 kN

5 Pressure relief duct at side,including end cover

6 Instead of individual openings, continuos openingsor drilled holes are possible

7 Earthing bar

8 Panel without cable connection, e.g. bus couplerpanel, metering panel

9 Door

10 Waste air opening

11 Intake air opening

12 Intake air opening, if required


14 Waste air opening, (other alternative possibleaccording to the requirements of the project)

15 Height of cable basement as required

16 To main earthing bar

17 Opening for control cable


19 Power cable

20 Absorber

21 Screed

Panel width a b c din switchgear

mm mm mm mm

600 mm 1120 1255 1100 1100

800 mm or600 mm mixed with800 mm 1320 1455 1300 1300

1300

700

a

625

430

50

190 210 210 190

1080

155

600600 600 600250500 800 800 800 800

5

3

6

1

27

48

A

A

1)

8x150

150150

1)

c

1)

155 15

5

800 800 800

C

C

B

B

8

1800

1500 1

70

1350

835

12108

d1)

43085 85 630

85

85 630

330 80

1)

210

635

635

160

b1)

1)

Aisle width:

In the case of transverse installation of a panel, the minimum aislewidth is c:Maximum panel depth (including possible overhangs) plus 300 mm.The dimensions for a (wall clearance foundation frame) and b (wallclearance ceiling opening for control cables) are to be adjustedaccordingly.

As an option, the dimension for the low voltage compartment (paneldepth) for systems fitted with conventional relays and control facilities canbe 100 mm greater than in the standard version.The dimensions for a (wall clearance foundation frame) and b (wallclearance ceiling opening for control cables) then become 100 mmlarger, while the aisle width remains unchanged.

Room height

Plasma diverter Absorber min. room heightmm

Panel ZX1.2 with 2800

Panel ZX1.2 without 2600



with plug-in voltage without 2700

transformers above with 2950

35

c) Dimension for panel width 800 mmConnection of up to 4 cables per phase, panel depth1800 mm.Cable plugs size 3

Figure 5/11: Sections for figure 5/10See figure 5/10 for legend and dimensional table

1) Minimum2) Dimension for panel width 800 mm. These

dimensions are reduced by 200 mm for anuniform panel width of 600 mm.

3) Distance wall to foundation frame element

a) Panel width 600 mm or 800 mmConnection of 1 cable, panel depth 1300 mmCable plugs size 2 or 3

b) Panel width 600 mm or 800 mmConnection of 2 cables per phase, panel depth 1500 mm.Cable plugs size 2 or 3

A

o 3

mm

>

>

1300 1) 2)

1080

1) 2)

1)

2300

1)

1300

2100

15

9

11

18

1019

12

1300

A

2

1)Section A - A

700

2640

ZX1.2

(25)

2370

2600

W

ITHO

UT AB

SORB

ER

16

1

20

(155)

2950

W

ITH

ABSO

RBER

1) 1)

2)

171455

13206351601210

2101) 2)

13

1421

3)

A

o 3

mm

>

>

3)

1) 2)

1) 1500700

1080

1) 2)

1)

2300

1)21

00

15

9

11

18

1019

12

1300

A

2

Section B - B

2640

(25)

2370

2600

W

ITHO

UT AB

SORB

ER

1300

16

1

20

(155)

2950

W

ITH

ABSO

RBER

1) 1)

2)

171455

1320635330

1410210

1) 2)

13

14

21

170

ZX1.2

A

o 3

mm

>

>

1)

1) 1800700

1)

1)

2300

1)21

00

15

9

11

18

1019

12

1300

2

Section C - C

2640

2370

2600

W

ITHO

UT AB

SORB

ER

1300

16

1

20

2950

W

ITH

ABSO

RBER

1) 1)

171455

1320635625

1710210

1) 2)

13

14

21

19

ZX1.2155 155155

1080

A(25)(155)

36

Plasma diverter Absorber min. room heightmm


Panel ZX1.2 without 2600



with plug-in voltage without 2700

transformers above with 2950

Room height

Figure 5/12: Guideline construction data for a raised floorSee figure 5/13 for sections


dimensions are reduced by 200 mm for a uniformpanel width of 600 mm.

1 Inspection aisle

2 Operator aisle

3 Basement entrance

4 Platform, approx. 25kN

5 Pressure relief duct at side, including end cover

7 Earthing bar

8 Panel without cable connection, e.g. bus couplerpanel, metering panel

9 Door


11 Intake air opening

12 Intake air opening, if required


14 Waste air opening, (other alternative would bepossible according to the requirements ofthe project)

15 Height of cable basement as required

16 To main earthing bar


19 Power cable

20 Absorber

22 Intermediate frame construction, only shown inthe area for the switchgear.

23 Intermediate frame construction, supplied by others

24 Cover plate, supplied by others

757565045075

75

M 8M 8M 8

D

1)

1)c

b13

001)

700

1)

50

190 210 210 190

1080

155

600600 600 600250500 800 800 800 800

5

3

22

1

27

48

A

A

8x150150150

1)1)

155 15

5800 800 800

C

C

B

B

23

8

1800

1500

170

1350

835

1150

8

D

a

Panel width a b cin switchgear

mm mm mm

600 mm 1150 1100 1100

800 mm or600 mm mixed with800 mm 1350 1300 1300

Aisle width:

In the case of transverse installation of a panel, the minimum aislewidth is b:Maximum panel depth (including possible overhangs) plus 300 mm.

As an option, the dimension for the low voltage compartment (paneldepth) for systems fitted with conventional relays and control facilitiescan be 100 mm greater than in the standard version.The dimensions for a (wall clearance centre of floor support) thenbecomes 100 mm larger, while the aisle width remains unchanged.

37

c) Dimension for panel width 800 mmConnection of up to 4 cables per phase,panel depth 1800 mm.Cable plugs size 3

Figure 5/13: Sections for figure 5/12See figure 5/12 for legend and dimensional table


dimensions are reduced by 200 mm for anuniform panel width of 600 mm.

a) Panel width 600 mm or 800 mmConnection of 1 cable, panel depth 1300 mmCable plugs size 2 or 3

A

o 3

mm

>

>

1) 2)1300

1080

1)

2300

1)

1300

2100

15

9

11

18

1019

1150

14

13

12

13501)

1300

A

2

1)Section A - A

700

2640

ZX1.2

(25)

2370

2600

W

ITHO

UT AB

SORB

ER

24

16

1

20

(50)

2950

W

ITH

ABSO

RBER

1) 1)

2)

2)

2)A

o 3

mm

>

>

1) 2)1300

170

1080

1)

2300

1)

1500

2100

15

9

11

18

1019

1350

14

13

12

13501)

1300

A

2

1)Section B - B

700

2640

ZX1.2

(25)

2370

2600

WIT

HOUT

AB

SORB

ER

17

16

1

20

(50)

2950

W

ITH

ABSO

RBER

1) 1)

2)

2)

A

o 3

mm

>

>

1)

155 155 155

1)

2300

1)

1800

2100

15

9

11

18

1019

1650

14

13

12

13501)

1300

A

2

Section C - C

700

2640

ZX1.2

(25)

2370

2600

WIT

HOUT

AB

SORB

ER

1)1300

23

16

1

20

(50)1080

2950

W

ITH

ABS

ORBE

R

1) 1)

b) Panel width 600 mm or 800 mmConnection of 2 cables per phase, panel depth 1500 mm.Cable plugs size 2 or 3

38

5.7 Connection of cables and wiring

The cable compartments (3.0) in the panels arefitted with cable connection fittings in accordancewith the cable types and sizes specified in theproject planning for the switchgear as a whole.

5.7.1 High voltage XLPE cable with plug-inconnectors

(Figures 3/2, 3/7, 5/7, 5/8)

Lay the XLPE cables as specified in the projectplanning to the individual panels.

Remove the transport covers fitted to protect thesockets.

Expose the cable cores, check the correctphase assignment, and secure.

Fit current sensors if appropriate.

Fit cable plug (3.4) in accordance with themanufacturers instructions.

Fit toroidal core current transformers (5.1) ifappropriate.

Fit the plugs to the sockets (1.7) mounted in thecircuit-breaker compartment floor (withoutopening the insulating gas compartment) andsecure them with bolts.

Align the cables and fasten them at mountings(3.3).

Fasten current sensors or current transformers ifappropriate.

Close off any unused sockets (1.7), e.g. in sparepanels, with suitable cable blanking plugs toensure the necessary insulation.

5.7.2 Control cables and wiring

Establish the necessary connections forincoming and outgoing cables and wiring, andcross connections.

The control cables and wiring are to be laid incable ducts at the right of the cable compart-ment (for external wiring).

The connections from panel to panel are to bemade by plug connectors in the controlcabinets.

5.8 Preparing the insulating gas system foroperation

Observe the relevant data in instruction manualBA 427/E Insulating gas system for ZX switchgear.

5.9 Final erection work

Clean the external surfaces of the enclosure andcontrol cabinets in the switchgear wherenecessary and check for any damage to thepaintwork, touching up with a suitable paint ifnecessary (see Section 7.3.3).

Properly refit any cladding and covers ofoperating mechanisms, cable ducts, etc.removed during the erection work.

Remove all tools and other foreign bodies fromthe switchgear.

Check the general condition of the switchgear.

Check that the areas adjacent to the switchgearare in the proper condition.

39

6 Commissioning/operation

Note on safety at work

Operation by trained specialists familiar with theparticular switchgear only.

6.1 Commissioning

6.1.1 Preparatory work

In preparation for commissioning, the followingwork is to be performed prior to connection withthe high voltage power supply:

Connect the supply and control voltage andcheck the correct polarity.

Check mechanical and electrical interlocks forcompliance with the specified conditions.

Perform a functional test on the protectivedevices (observe DIN VDE 0141).

Check the general condition of the switchgearand external conditions for detrimental factors ofany kind.

Display the instructions for handling SF6 in theswitchroom. The handling specifications for SF6also apply accordingly to nitrogen (N2).

Display the ABB instruction manual on thehandling of insulating gas and behaviour duringfaults in the switchroom.

Instruct the local operators on the fundamentaldetails of operating the switchgear in normalservice.

Check the readiness for operation and theswitching condition of the upstream anddownstream electrical equipment.

Perform further checks where necessary on thefollowing equipment from the areas adjacent tothe switchgear:

power cables

control wiring

supply voltage and its polarity

remote controls

external earth with connection to mainearthing bar (3.1)

switchroom equipment

switchroom condition.

6.1.2 Initial start-up

Comply with all relevant safety regulations

Ensure that the switchgear circuit-breakers arein the OFF position.

Close the disconnector for the relevant busbarsystem.

Cancel any existing short-circuiting and earthingconnections in the critical switching area.

Check that corresponding conductor sectionsare in phase where relevant with severalincoming feeders and switchgear sections.

Energise the switchgear step by step, observingthe displays on the REF542 plus.

Check measurements and functions dependanton high voltage.

Look out for irregularities of any kind.

6.2 Switching operations

6.2.1 Circuit-breaker

(Figures 3/7, 6/1, 6/2, 6/4)

The circuit-breaker is fitted with a charging motor.Charging of the spring energy storage mechanismtakes place automatically.

Opening and closing the circuit-breaker:

Closing and opening are effected by operation ofthe devices fitted.

ON-OFF switching operations may only beperformed with the control cabinet door closed.

Opening the control cabinet door constitutesintervention in the interlock system. Opening ofthe control cabinet door can constituteintervention in the interlock system (see sections3.8 to 3.10).

Observe the position indicator.


1. On failure of the charging motor, the chargingprocess can be performed or completed byhand:

Open control cabinet door (4.3).

Insert charging lever (6.3) into recess (1.40)and pump for approx. 25 strokes until thecharged condition is displayed.

When the charged condition is reached, thecharging mechanism automatically disengagesand further strokes of the charging lever have noeffect.

Key to the charging condition displays:

Discharged Charged

2. If the control voltage fails with the circuit-breakerclosed, it is possible to open it using themechanical OFF push-button (1.35).

Note:

On failure of the control voltage, there is nomaloperation protection for the circuit-breakerand three-position switch during emergencymanual operation.

40

6.2.2 Three-position switch(Figures 3/7, 6/1, 6/3 and 6/5)

The three-position switch (2.1) is fitted withmotor-operated mechanism. Opening andclosing are effected by selection on the baycontrol and protection unit.

Routine opening/closing operations may only beperformed with the control cabinet door closed.Opening of the control cabinet door can con-stitute intervention in the interlock system (seesections 3.8 to 3.10).

Observe the switch position indication on theLC display (4.7) or on the electrical positionindicators.

On the three position switch operatingmechanism (2.2), sensors (2.28) to (2.31) detectthe following switch positions:

- Disconnector (-Q1) ON and OFF

- Earthing switch (-Q5) ON and OFF


In place of motorised operation, the switchingprocess can also be initiated and completedmanually.

Caution!

Intervention in the interlock concept is possible byopening the control cabinet door.

Switch the three-position switch on or offmanually.

This requires the following actions:

Open the control cabinet door. Switch the circuit-breaker off.

With the mechanical interlock between circuit-breaker and three position switch option,opening flap (2.22) on the three position switchoperating mechanism activates a mechanicalinterlock between the two devices.

Note:

The flap (2.22) can only be opened when thecircuit-breaker is OFF.

Prior to emergency manual operation, switch therelevant m.c.b. (F101) off.

Insert the crank (6.1) in the hollow shaft (2.26).

Three-position switch operation:

If the three-position switch is in the centralposition (i.e. disconnector and earthing switchOFF), the disconnector can be closed withapprox. 24 clockwise turns, and the earthingswitch with approx. 24 anti-clockwise turns. Ifthe earthing switch ON position is to bereached from the disconnector ON position, orvice versa, the crank is to be removed in the self-inhibiting central position (disconnector andearthing switch OFF) and refitted. When thecrank is refitted, the further switching operationis automatically enabled.

Note:

Always perform every switching operation rightup to the stop in the relevant limit position.

Observe the mechanical and electrical positionindicators.

Close flap (2.22) again.

Note:

When flap (2.22) is open, the circuit-breaker islocked in the OFF position.

Close the control cabinet door.

6.2.3 Undervoltage release

Undervoltage releases may be fitted as an option.In order to prevent the circuit-breaker beingopened by the undervoltage release on powerfailure with tee-off earthing, a tie wire is provided.

6.3 Observation of the display and monitoringfacilities

6.3.1 Gas monitoring(Figures 6/1, 6/6)

All high voltage compartments in the switchgearmust have a sufficient insulating gas pressure duringoperation. The minimum operating pressure is listedin section 2.1. This is monitored by sensors (1.8) and(2.3).

If the gas pressure falls below the minimumoperating pressure, a LED on the bay control andprotection unit signals that the gas should betopped up. With conventional panel control, theissue of the signal is optional and dependent on theindividual project.

Note:

If a panel is isolated for a relatively long period(several weeks), m.c.b. (F116) for the auxiliaryvoltage supply to the REF542 plus must remain on.Only in this way is monitoring of the insulating gasensured. With conventional panel control, the detailsin the order documents are to be observed.

Details on the gas system of the ZX1.2 switchgearcan be found in instruction manual BA 427/E.

6.3.2 Electrical/mechanical display/monitoring

During operation of the switchgear, observe allvisible operating data and condition displays in thesecondary system and watch out for irregularitiesof any kind, including the external conditions of theswitchgear.

6.4 Test procedures

6.4.1 Testing for the off-circuit condition

(Figure 6/1)

The panels are fitted with the low impedance,capacitive voltage indicator system LRM (andKVDS respectively) for testing of the off-circuitcondition.

41

For details, see draft DIN VDE 0682 Part 415, orIEC 61243 Part 5.

Note:

Only display units which comply with the IEC or VDEstandards and the technical design of the indicatorsystem in the relevant switchgear may be used!

Note:

The measuring sockets must on no account beshort-circuited, except during voltage testing of thesystem (e.g. with power frequency withstandvoltage or impulse withstand voltage)!

Testing for the off-circuit condition is performed with aplug in display unit at corresponding pairs of measuringsockets (1.6) and optional at (4.5) (Front side).

Use of the display unit:

Perform a functional test on the display unitimmediately before and after use, e.g. withinterface tester KSP. The display must be clearlyvisible.

The presence of operating voltage is indicatedby a signal.

Observe the individual operating instructions forthe display unit for the relevant switchgear!

Interface testing:

Perform interface testing as a functional test onall coupling components, e.g. with interfacetester KSP.

The interface test is a repeat test to IEC 61243Part 5 or draft DIN VDE 0682 Part 415.

6.4.2 Testing for the in-phase condition

Testing for the in-phase condition, e.g. when thereis more than one incoming feeder, can beperformed with a suitable phase comparator atmeasuring sockets (1.6 and 4.5 respectively) onthe capacitive voltage indication system.

Test procedure:

Only use phase comparators which comply withthe IEC or VDE specifications and the technicaldesign of the display system in the relevantswitchgear!

Perform a functional test on the equipment atthe start of testing.

Do not exceed the maximum permissible lengthof measuring leads per phase.

Connect the measuring leads preciselyassigned to the corresponding main conductorsections.

Always follow the details in the operatinginstructions for the phase comparator!

6.4.3 High voltage tests

(Figures 3/7, 6/1, 6/6, 6/7)

The test plugs available for high voltage tests,shown in figure 6/7, are suitable for the followingapplications up to and including 24 kV ratedvoltage.

For high voltage tests on the 36 kV rated voltagelevel, separate test facilities are required (testcable). Information on these can be obtained fromthe switchgear manufacturer.

On account of the sensor technology used and thebay control and protection unit, the test voltagemust not exceed the following levels:

Cable tests with DC voltage:

12 kV switchgear: 481) kV

14/26 kV switchgear: 701) kV

up to one hour.

1) On use of voltage sensors which are not isolated. Voltagesensors are to be isolated and taken off-circuit by the isolatingdevice.

Insulation testing of the switchgear at the rele-vant power frequency withstand voltage:

12 kV switchgear: 28 kV

24 kV switchgear: 50 kV

36 kV switchgear: 70 kV.

Performance of voltage test plugs:

Isolate the switchgear area in accordance withthe safety rules of VDE 0105 and secure it toprevent reconnection.

Verify the off-circuit condition with a suitablehand-held display unit at measuring sockets(1.6) or (4.5) on the capacitive voltage indicatorsystem.

Unscrew surge arresters where fitted and closeoff the exposed sockets with insulating cabledummy plugs.

Close off emty cable sockets with insulatingcable dummy plugs.

Check the test plug to ensure that the surface isclean and dry, and clean it if necessary.

Grease the insulating part of the test plugs inaccordance with the instructions.

Unscrew cable dummy plug (1.5) in the relevanttest socket (1.4) and remove it.

Connect an earthing lead to the test plug,following the instructions on safety at work infigur 6/6.

Insert the test plug into the prepared test socketand screw it tight.

Notes:

Only fit the test plugs for voltage tests for theduration of those tests.

Short-circuit the measuring sockets (1.6) or (4.5)in the panels concerned for the duration of thetesting process at test voltages up to ratedpower frequency withstand voltage.

For performance of cable tests, in the switching

42

condition tee-off disconnected and earthed,earthing of the cable has to be cancelled byopening the circuit-breaker. This is accomplishedby using the mechanical OFF button to open thecircuit-breaker (see also Section 3.10).

6.4.4 Maintenance earthing

Earthing of the busbar with the bus tie / riser, asdescribed in section 3.10.

Earthing with an earthing and short-circuitingset.

Handling during earthing with an earthing andshort-circuiting set:

(Figures 6/1 and 6/8)

The plugs shown in figure 6/8 in conjunction withcorresponding short-circuiting and earthing cablesets are to be used for maintenance earthing. Theshort-circuit withstand capability of the cable setmust correspond to the conditions of the switch-gear installation.

Caution!

Observe the notes in Section 3.8 on the interlockdependencies for all work with earthing and short-circuiting sets!

Isolate the switchgear area in accordance withthe safety rules of VDE 0105 and secure it toprevent reconnection.

Verify the off-circuit condition with a suitable(hand-held) display unit at measuring sockets(1.6) or (4.5) on the capacitive voltage indicatorsystem.

Unscrew surge arresters where fitted and closeoff the exposed sockets with insulating cabledummy plugs.

Close off empty cable sockets with insulatingcable dummy plu

Documents

Celdas Abb Sf6 Zx1.2