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Medium voltage products

UniGear ZS1

Installation, operation and maintenance instruction manual

Your safety f irst at all t imes! 1

1. Summary 2

1.1. Introduction 2

1.2. General 2

1.3. Standards and specifications 2

1.4. Operating conditions 2

2. Technical data 4

2.1. Electrical data 4

2.2. Resistance to internal arc faults 4

2.3. Dimensions and weights 5

3. Panel design and equipment 7

3.1. Basic structure and variants 7 3.2 Enclosure and partitioning 7

3.3. Compartments in the panels 11

3.4. In terlock/protection against incorrect operation 16

3.5. Circuit-breaker and contactor plug connector

coding 21

3.6. IthLimitors 22

3.7. Fast recovery device 23

4. Dispatch and storage 24

4.1. Condition on delivery 24

4.2. Packing 24

4.3. Transport 24

4.4. Delivery 254.5. Intermediate storage 25

4.6. Handling 25

5. Assembly of the switchgear at site 29

5.1. General 29

5.2. Foundations 29

5.3. Assembly of the switchgear panels 47

5.4. Procedure for setting-up the doors of UniGear

switchgear with adjustable hinges 48

5.5. Installation of the bushing 52

5.6. Fixing of the panels 53

5.7. Installation of the busbars 54

5.8. Installation of the top-mounted boxes 63 5.9. Pressure relief ducts 71

5.10. Cable connection 73

5.11. Earthing the switchgear 79

5.12. Installation of interconnecting bundles 79

5.13. Final erection work 79

6. Operation of the switchgear 80 6.1. Switching operations 80 6.2. Test procedure 91

6.3. Service trucks 92

7. Commissioning 94

7.1. Preparatory work 94

7.2. Measurements and tests 95

8. Maintenance 96 8.1. Maintenance strategies 96

8.2. Preventive maintenance 96

8.3. Inspection 97

8.4. Servicing 99

8.5. Repairs 101

8.6. Risk-Based maintenance 103

8.7. Spare parts, auxillary materials and lubricants 103

8.8. Operating accessories 104

9. Product quality and environmental protection 105

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Your safety first at all times!If you have any further questions about this instruction

manual, ABBs field service team will be pleased to provide

the required information.

We reserve all rights to this publication. Misuse, including in

particular, duplication and making this manual - or extracts

thereof available to third parties is prohibited. We do not

accept any responsibility for the information provided, which is

subject to change.

WARNING

Always follow the instruction manual and

respect the rules of good engineering

practice!

Hazardous voltage can cause electrical

shocks and burns.Disconnect power, then earth and short-

circuit before proceeding with any work on

this equipment.

That is why our instruction manual begins with the

following recommendations:

Only install switchgear in closed rooms suitable for electricalequipment.

Ensure that installation, operation and maintenance is onlycarried out by qualified competent electricians.

Fully comply with the legally recognized standards (IEC orlocal), the connection conditions of the local electrical utility

and the relevant safety at work regulations.

Observe the relevant information in the instruction manualfor all actions involving switchgear.

Danger!

Pay special attention to the hazard notes in the instruction

manual marked with this warning symbol.

Make sure that the specified criteria are not exceededunder switchgear operating conditions.

Ensure the instruction manual is accessible to all personnel involved in installation, operation and maintenance.The user s personnel must act responsibly in a ll matters relating to safety at work and correct handling of the

switchgear.

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2. Technical data

2.1 Electrical data

2.1.1 Main parameters for panels with circuit breakers

2.1.2 Main parameters for panels with switch-disconnectors NALF

2.2 Resistance to internal arc faults

The fault withstand capacity is as follows:

12 kV - 50 kA 1s

17.5 kV - 50 kA 1s

24 kV - 31,5 kA 1s

For individual switching device data, see the instruction manual for the relevant switching device, as listed under 8.2.

Rated voltage kV 12 17,5 24

Rated power frequency withstand voltage kV 1 min 28 38 50

Rated lighting impulse withstand voltage kV 75 95 125

Rated frequency Hz 50/60

Rated current of busbars A ...4000 ...2500

Rated current of branches A ...630 ...630

Rated breaking current of switch-disconnector

(power factor = 0.7)A ...630 ...630

Rated short-time withstand current of

switch-disconnector 1s 1)kA ...25 ...20

Rated short-circuit making current kA ...40 ...38

Rated peak withstand current kA ...62.5 ...62.5

Auxi lia ry voltage VDC 24, 48, 110, 220;

AC 110, 230

Rated voltage kV 12 17.5 24*

Rated power frequency withstand voltage kV 1 min 28** 38** 50

Rated lightning impulse withstand voltage kV 75 95 125

Rated frequency Hz 50/60

Main busbar rated current A 4000 4000 3150

Circuit-breaker rated current A 4000 4000 3100

Peak current kA 125 125 80

Internal arc withstand current kA 1 s 50 50 31,5

Rated short time withstand current kA 3 s 50 50 31,5

* 27,6 kV with VD4 according to CSA C22.2 No 31-10 is available

** 42 kV (GB/DL)

VSC7/P VSC12/P

Rated voltage kV 7.2 12

Rated insulation voltage kV 7.2 12

Rated power frequency withstand voltage kV 1min 20(3) 28 (3)

Rated lightning impulse withstand voltage kV 60 75

Rated frequency Hz 50/60 50/60

Rated short-time withstand current kA (1) 50 50

Peak current kA 125 125

Internal arc withstand current (2) kA 1s 50 50

Maximum rated current of the contactor A 400 400

2.1.3 Main parameters for panels with vacuum contactor

(1) Limited by the fuses.

(2) The internal arc withstand values are guaranteed in the compartments on the supply side of the fuses (busbars and apparatus) by the structure of the switchgear and on the load side (feeder)

by the limiting properties of the fuses.

(3) VSC7/PG for 32 kV power frequency withstand voltage and VSC12/PG for 42 kV power frequency withstand voltage are available on request in a dedicated panel.

The switchgear units have been tested according to IEC

62271-200 standard (Annex A, accessibility type A, IAC

classification FLR) and also to PEHLA recommendation no.

4. In individual cases, depending on the configuration of the

switchgear panels and/or the switchroom conditions (e.g.

low ceiling height), additional measures may be necessary to

ensure compliance with criterion 5.

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1) Height of the control cabinet is 705/1100 mm2) 1000 mm on request.3) Deeper units are available on request4) Feeders equipped with the VSC contactor are 650 mm wide up to the 50 kA short-

time current and up to 12 kV rated voltage.

2.3.1 Dimensions and weights of 12/17.5 kV units with

circuit-breakers and contactors

Weight of 12/17.5 kV panels (including withdrawable

circuit-breaker parts):

2.3 Dimensions and weights

Dimension mm

Height A 2200/2595 1)

Width

- Feeder panels up to 1250 A (up to 31.5 kA)4)

- Feeder panels up to 1250 A (above 31.5 kA)

- Feeder panels 1600 - 2000 A

- Feeder panels above 2000 A

B650

800

800 2)

1000

Depth

C 3)

- up to 2500 A, 31.5 kA 1340

- 3150 A, 40 kA 1355

- 4000 A, 40 kA 1390

- 3150 A, 50 kA 1390

- 4000 A, 50 kA 1455

Height of the basic part of panel D 2100

E 1495

Rated current Mass

A Kg

...1250 800-8501600 850-900

2000 850-900

2500 1200

3150 1200

4000 1400

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2.3.2 Dimensions and weight of 24 kV units with circuit-

-breakers

Weight of 24 kV panels (including withdrawable circuit-

breaker parts):

Rated current Mass

A Kg

...1250 1000-1050

1600 1200

2000 12002500 1200

Dimension mm

Height A 2325/27201)

Width B

800 2)

1000

- Feeder panels up to 1250 A

- Feeder panels above 1250 A

Depth C 4) 1700

Height of the basic part of panel D 2200

E 16201) Height of the control cabinet is 705/1100 mm.2) 1000 mm on request.3) Dimension must be verified according to relevant order documentation.4) Deeper units are available on request

Height A 2200/2595 1)

Width

- Outgoing and incoming panels withswitch-disconnector

B 800630 A 4)

Depth C 1300/1340 2)

Height of basic part of panel D 2100

E 1495

2.3.3 Dimensions and weight of panels with the switch-

-disconnector NALF 12 and 17,5 kV

2.3.4 Dimensions and weight of panels with the NALF

switch-disconnector 24 kV

1) Height of control cabinet is 705/1100 mm.2) The depth of panel with the switch-disconnector in combination with HD4 circuit breaker

panels is recommended to be 1340 mm,

in other cases 1300 mm always take into account note 3)3) The dimensions must be verified according to the relevant order documentation.4) Max. current of LBS panel limited by coordinated fuses.

Weight of 12/17,5 kV panel (including the switch-disconnector):

Outgoing and incoming panels of width 800 mm......ca 750 kg

1) Height of control cabinet is 705 /1100mm2) The depth of panel with the switch-disconnector in combination with HD4 circuit breaker

panels is recommended to be 1560 mm, in other cases 1520 mm always take into

account the note 3)3) The dimensions must be verified according to the relevant order documentation.4) Max. current of LBS panel limited by coordinated fuses.

Weight of 24 kV panel (including the switch-disconnector):

Outgoing and incoming panels of width 1000 mm.....ca 950 kg

Dimension mm

Height A 2325/2720 1)

Width B 1000

- Outgoing and incoming panels with

Depth C 1520/1560 2)

Height of basic part of panel D 2200

E 1620

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3.1 Basic structure and variants

The basis for the UniGear panel is the incoming/outgoing

feeder panel with SF6or vacuum circuit-breaker using insertion

technology. It is divided into busbar compartment I., circuit-

breaker compartment II., cable compartment III. and control

cabinet IV. for the secondary equipment. Apart from this, thereare variants for all operating needs.

For busbar sectionalising, two panels are necessary, the

coupling panel with the withdrawable circuit-breaker part and a

bus riser panel (optional with busbar metering and earthing). In

equipment without busbar sectionalising, a direct bar connection

between the busbars will be established.

The UniGear switchgear also includes the variant of incoming/

outgoing panel with the NALF switch-disconnector with the

stationary mounting of the switch-disconnector. The panel

is divided into busbar compartment A, switch-disconnector

compartment including cables B and control cabinet for the

secondary equipment D.

Further details about installation and switchgear equipment canbe obtained from the relevant order documents.

3.2 Enclosure and partitioning

The enclosure and internal parti tions of the panels are of 2

mm thick high quality AlZn sheets. The three high voltage

compartments (busbar compartment, circuit-breaker

compartment and cable connection compartment) are equipped

with top-mounted and secured pressure relief flaps. These open

in the case of overpressure due to an internal arc fault.

The front of the panel is closed off by pressure resistant doors

which open to an angle of 130.

Cable and circuit-breaker compartments have their own doors,

both compartments can be equipped with inspection windows

made of security glass. Neighbouring panels are partitioned from

one another by the side walls of each panel and, as a result of

the design, the air cushion remains between these walls when

the panels are jointed together.

The enclosure is completed on the roof by top-mounted

pressure relief flaps which, according to the rated branch

conductor current, are made of sheet steel or expanded metal

and at the base by means of floor-covering 17 (Figures 2, 3),

made of Al sheet.

The pressure-relief flaps are secured with steel screws on one

longitudinal side and on the other longitudinal side with plastic

screws. In the case of internal overpressure, the plastic screws

are the rupture point.

Arc fault current limitation can be achieved by undelayed circuit-

breaker release, carried out by auxiliary switches operated by the

pressure wave.

The switchgear can be equipped with the following systems:

Ithlimiter: the auxiliary switches 11.5 (figure 34) are operated by

the pressure relief flaps.

Fast recovery device: the auxiliary switches are mounted on

the pressure sensors and operated by the sensor stroke pin (see

chapter 3.7).

The necessary safety measures to counteract the effects ofan internal arc fault must be ensured in relation to the ceiling

height. In individual cases, this may require additional operator

protection measures on the switchgear panels. These measures

include:

1. Mounting a pressure relief duct 50 (figure 123) on the top

of the switchgear, with further channels leading out of the

switchgear room in a form appropriate for the design of the

building. The shock wave and arc discharge are channelled off in

ducts.

2. Mounting a pressure relief duct with blow-out apertures

located above the duct at the ends of the switchgear and

pointing towards the centre of the switchgear (diverter duct).

The shock wave and arc discharge then emerge in an extremely

attenuated form and in a location which is not critical for the

operating personnel.

The rear wall of the busbar compartment 84, intermediate wal l

9, mounting plate 12 with shutters 12.1/12.2 and horizontal

partition 20, form part of the internal partitioning (Figures 2, 3).

The internal partitioning makes safe access to the circuit-breaker

and cable compartments possible even when the busbars are

live.The low voltage compartment for the secondary equipment is

completely protected from the high voltage area thanks to its

steel-sheet casing.

On the end sides, cover plates ensure a good appearance and

are mechanically and thermally arc fault proof should such an

event occur in the end panel.

Doors and cover plates are thoroughly cleaned and treated

against corrosion before receiving a high quality double coating

of paint. The finishing coat is in the standard RAL 7035 color

(special colors by agreement). Stoving completes the procedure

and provides considerable resistance to impact and corrosion.

The circuit-breaker compartment and cable connectioncompartment doors are pressure resistant and can either be

fitted with screws or manual closing systems. (central handle)

3.2.1 Ventilation of the panels

Openings in the outer enclosure are needed for ventilation in

the case of certain rated currents in the busbars and branch

bars.

For incoming air to the circuit-breaker compartment, the

horizontal partition is provided with air-vents 20.2. IP4X

degree of protection and safety in the case of any release

of hot gas due to an arc fault is provided by flap 20.3 in the

horizontal partition 20. For outgoing air, the pressure relief

flaps 1.1 incorporate vents which provide the IP4X degree

of protection (Figure 2, 3).

In cases of higher ambient temperature (>40 C) and/or

increased frequency (60 Hz) it necessary to apply the rating.

It is necessary to use forced fan ventilation in 3600 A and

4000 A panels for 12/17.5 kV rated voltage and in 3150 A

panels for 24 kV rated voltage. Please refer to figure 169 and

170.

3. Panel design and equipment

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Instructions for switching of cooling fans:

INCOMER 12/17.5 kV 4000 A, ambient temperature max. 40C

CurrentFAN 1

Circuit Breaker

FAN 2

Current transformersNote

< 3200 A No No both fans are stopped

=> 3200 A Yes Yes both fans start operation

INCOMER 12/17.5 kV 3600 A, ambient temperature max. 40C

CurrentFAN 1

Circuit BreakerNote

< 3200 A No fan is stopped

=> 3200 A Yes fan starts operation

INCOMER 24 kV 2500 A, ambient temperature max. 40C

CurrentFAN 1

Circuit BreakerNote



INCOMER 24 kV 3150 A, ambient temperature max. 40C

CurrentFAN 1

Circuit BreakerNote



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12.1

15.1

10

1.2

13

12.2

19

20.2

18

14

21

20

1.1

1

2

3

84

5

12

7

6

17

8

18

18.118.2

1414.114.2

20.2

A

B

D

C 16

1.2

9

20.3

9

A Busbar compartment

B Circuit-breaker compartment

C Cable compartment

D Low voltage compartment

1 Enclosure

1.1 Pressure relief flap 1.2 Control wiring duct

2 Branch conductor

3 Busbar

5 Isolating bushing

6 Earthing switch

7 Current transformer

8 Voltage transformer

9 Partition removable

10 Control wiring plug connector

12 Mounting plate

12.1 Top shutter

12.2 Lower shutter

13 Withdrawable part

14 Earthing switch operating mechanism

14.1 Operating shaft for earthing switch

14.2 Slide

15.1 Terminal rack 16 Cable sealing end

17 Floor cover split

18 Spindle mechanism

18.1 Spigot on spindle

18.2 Hole in spindle for insertion lever

19 Main earthing bar

20 Horizontal partition, removable

20.2 Ventilation grid

20.3 Back flap

21 Cable clamp

84 Partition

Figure 2: Example of UniGear feeder unit

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A Busbar compar tment

B Switch-disconnector and cable compartment

D Low voltage control cabinet

1 Enclosure

1.1 Pressure relief flaps

1.2 Control wire duct

2 Branch conductor

3 Busbar

15.1 Terminal rack

16 Cable sealing end

17 Floor cover - split

19 Main earthing bar

21 Cable clamp

84 Partition

200 Switch-disconnector

200.1 Position indicator of switch-disconnector

201 Operating mechanism of switch-disconnector

201.1 Operating shaft of switch-disconnector

201.2 Slide

202 Fuse or link203 Insulator or current transformer

204 Bushing

205 Insulating partition wall

205.1 Movable insulating plate

207 Earthing switch

207.1 Position indicator of earthing switch

207.2 Interlocking of earthing switch

208 Operating mechanism of earthing switch

208.1 Operating shaft for earthing switch

208.2 Slide

Figure 3: Example of panel with 12 kV switch-disconnector with fuses and earthing switch

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According to customer requi rements, this separation into

individual panels by means of busbar bushings 29 and

bushing plates 28 can also be provided in switchgear panels

where it is not technically necessary.

Top-mounted boxes with busbar earthing switches, or busbar

voltage transformers can be placed above the units.

3.3 Compartments in the panels

3.3.1 Busbar compartment

The busbars 3 (Fig. 2, 3) have a flat cross-section made of

copper and are laid in sections from panel to panel. For higher

rated currents (3150, 3600 and 4000 A), the busbars have

a open D-shaped cross-section. According to the current

rating, either single or double configuration is used. They are

held in place by the flat branch conductor 2 (Fig. 2, 3) and,

if installed, by busbar bushings 29 (section 5.5). No specialconnection clamps are needed.

Busbars and branch conductors for 17.5 and 24 kV are

insulated by means of shrink-on sleeves. The bolt connections

in the 17.5 and 24 kV busbar system are covered by

insulating covers 58 (section 5.7). The busbars for 12 kV units

up to 2500 A do not have covers. Open D-shaped busbars

3150, 3600 and 4000 A are insulated and the connections are

covered.

By means of bushing plates 28 and busbar bushings 29

(section 5.5), partitions can be created between panels.

These parti tions are necessary for higher rated short-time

currents see the following table.

Rated voltageRated short-timewithstand current

Partitions

25 kA

Every lateral panel; from 12 panels addi-

tional partiton in the middle; from 21 pa-

nels 2 additional partitions in each third

12/17.5 kV 31.5 kA Every lateral panel and every third panel

40 kA, 50 kA Every panel

24 kV25 kA

Every lateral panel; from 12 panels addi-

tional partiton in the middle; from 21 pa-

nels 2 additional partitions in each third

31.5 kA Every panel

Marine / Seismic

versionAll ratings Every panel

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3.3.2 Circuit-breaker compartment

The circu it-breaker compartment contains all the necessary

equipment for reciprocal operation of the withdrawable part

and the panel. Like the busbar compartment, it is metallically

partitioned on all sides.

The tul ip isolating contacts 5, together with the fixed isolating

contacts, are located in mounting plate 12 (Figure 2). The

metal shutters 12.1/12.2 (Fig. 4), covering the insertion

openings, are also included. The shutters are opened by the

actuating bars of the withdrawable circuit-breaker part, usingthe lever when inserting into the service position, and are

closed when the latter is removed. In the test/disconnected

position of the withdrawable part, partitioning by separation

is established in the main current circuit. Connection of

the control wiring, required for test purposes, need not be

interrupted when in the test/disconnected position.

In the test/disconnected position, the withdrawable part is still

completely inside the panel with the door closed. The ON/OFF

pushbutton located on the circuit-breaker, and the mechanical

indicators for ON/OFF and CHARGED/DISCHARGED can be

observed through an inspection window. If the circuit breaker

is in service position.The switching operations are carried out with the doors

closed. Installation of an additional mechanical switching

device for manual operation of the circuit-breaker in the

service position is also possible (see Fig. 7, 8).

The socket 10.1 for the control wiring is mounted in the

circuit-breaker compartment (Fig. 4).

10.2

13.1

18.1

10.1

12.1

43.3

12.2

42

14/14.1

Figure 4: View into the circuit-breaker compartment

10.1 Control wiring socket

12.1 Top shutter

12.2 Lower shutter

14 Earthing switch operating mechanism

14.1 Drive shaft

42 Right-hand travel rail

43.3 Duct cover, top right

Figure 5: Circuit-breaker compartment, open.

Withdrawable part in test position, control wiring plug connector open

10.2 Control wiring plug

13.1 Withdrawable part

18.1 Square spigot

Figure 6: Withdrawable part with VD4 type circuit-breaker, pole

side

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13.1518.2 18.1 S9 S8 10.3

91.14

91.13

Figure 9: Withdrawable part with circuit-breaker, type VD4, operating

mechanism side

13.15 Withdrawable assembly

Figure 11: VSC type vacuum contactor - front view

91.13 Signalling device ON/OFF

91.14 Operating cycle counter

Figure 12: VSC type vacuum contactor - pole side

91.15 MV fuses

91.15

14

Figure 10: Withdrawable assembly for circuit-breaker, with auxiliary switches

S8 Test position indicator

S9 Service position indicator

10.3 Control wiring plug connector for

withdrawable assemly

18.1 Square spigot

18.2 Hole in spindle for insertion lever spindle

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3.3.4 Cable connection compartment

The cable compartment conta ins current transformers 7, fi xed

and withdrawable voltage transformers 8, and earthing switch

6, according to individual operating requirements in each case

(Figure 2).

The cable compartment is constructed for installation of three

current transformers. Should all three current transformers not

be required, dummies will be installed in their place, using the

same installation and connection procedures.

The fixed voltage transformers are connected on the primaryside with flexible, fully-insulated cables which are connected

to the transformers.

The removable vo ltage transformers are f itted with HRC fuses.

The earthing switch can be used with either a manual or

motor-operated mechanism. Its switching position will be

indicated both mechanically by indication on the shaft and

electrically by means of the auxiliary switch.

Three fixed surge arrestors can be mounted instead of one

position of single-core cables.

Cable connection of 12/17.5 kV units:

In the 650 mm wide panel, up to three parallel plastic cablescan be connected with single-core cable protection and push-

on sealing ends with a maximum cross-section of 630 mm2.

In the 800 or 1000 mm wide panel, up to six parallel plastic

cables can be connected with single-core cable protection

and push-on sealing ends with a maximum cross-section of

630 mm2.

Customer requests regarding connections to bars, three-core

cables, special cables or sealing ends of different types must

be considered during the order-planning stage.

Cable connection of 24 kV units:

In the 800 mm wide panel, up to three parallel plastic cablescan be connected with single-core cable protection and push-


In the 1000 mm wide panel, up to six parallel plastic cables

can be connected with single-core cable protection and push-


For more information regarding cable connection, see chapter

5.10.

3.3.5 Control cabinet

The height of the control cabinet is 705/1100 mm. For details,

see chapter 2.3.

If the secondary devices are not intended for door installation,

they are mounted on DIN RAILS that enable any subsequent

changes to the wiring. In the lower part of the control cabinet,

there are three rows of DIN RAILS on the swivelling DIN RAILS

holder and, below these, there is an easily accessible auxiliary

switch for the control wiring plug.

Secondary wiring inside the panel is in a duct on the right

side of the panel. The left side of the panel is for the external

wiring. The ducts are covered with steel sheet 43.1, 43.2 (Fig.

76). There are holes for sliding in the ring conductors at the

side of the control cabinet.

3.3.6 Switch-disconnector and cable compartment in the

panel with switch-disconnector

The switch-disconnector and cable compartment is merged.

The stationary switch-disconnector is connected to busbars.

The interconnect ion to the busbar compartment is carried

out by bushings, which secures the separation of busbar

compartment from all other switchgear compartments.

The switch-disconnector and cable compartment is also

separated from other compartments by metal partitions.

The switch-disconnector can optional ly contain an integrated

earthing switch. The switching positions of the integrated

earthing switch type E can be indicated by an auxiliary switch.

The clos ing and opening of the switch-disconnector

is performed manually by a lever with the door closed.

On request, the device can be also mounted for the

motor operation of the switch-disconnector. The switch-

disconnector can therefore be operated both locally and

remotely.

The earthing switch is always operated local ly by the

operating lever.

The switchgear is constructed for the use of s ingle-core

cables as standard. The cable compartment usually contains

supporting insulators for the fastening of cables. On request

the cable compartment can contain the instrument currenttransformers instead of the supporting insulators. If all three

current transformers are not required, the relevant insulators

are installed instead of them.

Cable connection in the panels for 12 kV, 17,5 kV and 24 kV:

In the panel with switch-disconnector 1 plastic single-core

cable can be connected on each phase with a cross-section

up to 240 mm2 as standard.

Important notice:

In the case of any non standard cable connections an

agreement must be reached between the customer and ABB

during the technical preparation stage of the order.

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3.4.1 Panel internal interlocking

To prevent hazardous situations and incorrect operation,

there is a series of interlocks to protect both personnel and

equipment:

The withdrawable part can only be moved from the test/

disconnected position (and back) when the circuit-breakerand earthing switch are off (i.e. the switch must be off

beforehand.) In the intermediate position, the switch is

mechanically interlocked. When the circuit-breakers have an

electrical release, the interlock is also electrical.

The circuit-breaker can only be switched on when the

withdrawable part is in the test or service position. In

the intermediate position, the switch is mechanically

interlocked. When the circuit-breakers have an electrical

release, the interlock is also electrical.

If required, prevention of malfunction of the switch can also

be achieved by means of the control terminal (i.e. Relion).

In the service or test positions, the circuit-breaker can only

be switched off manually when no control voltage is applied

and it cannot be closed (electromechanical interlock).

Connecting and disconnecting the control wiring plug 10.2

(Fig. 141) is only possible in the test/disconnected position

of the withdrawable part.

The earthing switch 6 (Fig. 2) can only be switched on if the

withdrawable part is in the test/disconnected position or

outside of the panel (mechanical interlock 1)).

If the earthing switch is on, the withdrawable part cannot be

moved from the test/disconnected position to the service

position (mechanical interlock).

Optionally there can be interlocking on shutters to prevent

manual opening. If it is applied then a shutter device mustbe specified.

Details of other possible interlocks, e.g. in connection with

a locking magnet on the withdrawable part and/or earthing

switch drive, can be obtained from the relevant order

documents.

3.4.2 Door interlocking

The pane ls are equipped with the following interlocks:

The apparatus (circuit-breaker or contactor) cannot be

racked-in if the apparatus compartment door is open.2)

The apparatus compartment door cannot be opened if the

apparatus (circuit-breaker or contactor) is in service or in an

undefined position.

The earthing switch cannot be operated if the cable

compartment door is open.

The cable compartment door cannot be opened if the

earthing switch is open.

Note:

When the interlocking for circuit-breaker is used then it is

necessary to use the OFF push button on the door to provide

emergency switching OFF.

3.4.3 Interlocks between panels

The busbar earthing switch can only be closed when all the

withdrawable parts in the relative busbar section are in the

test/disconnected position (electromechanical interlock)1).

When the busbar earthing switch is closed, the

withdrawable parts in the earthed busbar section cannot be

moved from the test/disconnected position to the service

position (electromechanical interlock)1).

3.4.4 Locking devices

The shutters 12.1/12.2 (Fig. 4) can be secured

independently of each other with padlocks when the

withdrawable circuit-breaker part has been removed.

Access to the operating-shaft 14.1 (Fig. 2) of the earthing

switch can be restricted with a padlock.

Access to the circuit-breaker racking slot can be restricted

with a padlock.

Access to the circuit-breaker compartment and the cable

compartment can be restricted with a padlock.

3.4 Interlock/protection against

incorrect operation

16

WARNING

1) The locking magnet is not installed in the

case of a motor operator; busbar earthing

switches or the withdrawable parts are

electrically locked. The manual emergency

switch is not locked!

2) This interlock is not available for motor-

operated withdrawable apparatus as a

mechanical device.

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Standard safety interlocks (mandatory)

Type Description Condition to be fulfilled

1A Apparatus rack ing-in/out Apparatus in OFF position

B Apparatus closing Defined truck position

2A Apparatus rack ing-in Apparatus multi -contact plug plugged

B Apparatus multi-contact plug unplugging Truck in test position

3A Earthing switch closing Truck in test posit ion

B Apparatus racking-in Earthing switch in OFF position

4A Apparatus compartment door opening Truck in test posit ion

B Apparatus racking-in Apparatus compartment door closed

5A Feeder compartment door opening Earthing switch in OFF position

B Earthing switch opening Cable compartment door closed

Note: Apparatus are circuit-breakers and contactors.

Keys (on request)

6 Apparatus racking-in lock Can only be removed with the t ruck in the racked-out pos it ion

7 Earthing switch closing lock Can only be removed with the earthing switch open

8 Earthing switch opening lock Can only be removed with the earthing closed

9 Insert ion of the apparatus raking- in/out c rank lever Can always be removed

10 Insertion of the earthing switch operating lever Can always be removed

Padlocks

11 Apparatus compartment door opening

12 Cable compartment door opening

13 Insertion of the apparatus raking-in/out crank lever

14 Insertion of the earthing switch operating lever

15 Shutters opening or closing

Locking magnets (on request)

16 Apparatus racking-in/out Magnet energized

17 Earthing switch ON/OFF Magnet energized

Accessory devices

20 Shutters fail-safe

The device locks the shutters i n the closed pos ition when theapparatus is removed from the compartment. The operator cannotopen the shutters manually. The shutters can only be operated bythe apparatus truck or the service trucks (please see the dedicatedchapter at page 28).

21 Apparatus-switchgear unit compatibility matrixThe apparatus multi -contact plug and relati ve swi tchgear unit socketare equipped with a mechanical matrix, that disables apparatusracking-in into a switchgear unit with an inappropriate rated current.

22 Circuit-breaker mechanical operating mechanism

The apparatus compartment is equipped with a mechanical device,that enables circuit-breaker closing and/or opening directly by meansof the front operating mechanism pushbuttons, keeping the doorclosed. The controls can be operated with the circuit-breakers in theoperation and racked-out position.

3.4.5 Types of interlocks

17

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A

A

Figure 13: Circuit-breaker compartment door enabling device (A)

Figure 14: Circuit-breaker truck enabling slot (A)

B

Figure 15: Circuit-breaker compartment door locking device (B)

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C

C1

C2 Pin ON Pin OFF

D

Figure 17: Cable compartment door enabling device (C)

Figure 18: Cable compartment door enabling slot (C1) and earthing switch enabling pin (C2)

Figure 19: Cables compartment door locking pin (D)

C2

19

B

Figure 16: Circuit-breaker compartment door locking pin (B)

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200.1

200

205.1

205

Figure 20: Switch-disconnector compartment - open position. Insulat-

ing plate in the isolating distance of switch-disconnector

200 Switch-disconnector

200.1 Position indicator of switch-disconnector

205 Insulation partition wall

205.1 Movable insulation plate

20

In panels with digital control techniques the protection

against incorrect operation is basically carried out by the

panel software. But the earthing switch is operated locally

by the operating lever 215. The mechanical interlocking

between the switch-disconnector and earthing switch is still

in operation.

Details of other possible interlocks, e.g. in connection

with a locking magnet on the switch-disconnector, can be

obtained from the relevant order documents.

Figure 21: Preparation for the operation of earthing switch in panel with the

switch-disconnector

Operating lever prepared for the OFF operation

215 Operating lever

215

3.4.6 Internal interlocking of panel with switch-

-disconnector

To prevent hazardous situations and incorrect operation,

there is a series of interlocks to protect both personnel and

equipment:

The switch-disconnector can only be switched on if the

earthing switch is off. The earthing switch can only be

switched on if the switch-disconnector is off. The switch-

-disconnector and earthing switch are mutually mechanically

interlocked.

The door of the lower HV cable part of the panel can

only be opened if the earthing switch is on. During the

closing of the earthing switch the insulating plate 205.1

is automatically inserted in the isolating distance of

switch-disconnector, which increases safety. This plate

is automatically removed again during the opening of the

earthing switch.

The earthing switch can only be operated if the cable

compartment door is closed.

If the control voltage is not connected, the switch-

-disconnector can be open and closed only manually. The

manual operation of switch-disconnector and earthing

switch can be prevented if the slides 201.2 and 208.1 ofthe operating openings are locked up.

WARNING

The door of the upper HV part of the

panel can only be opened if the off-circuit

condition of the switch-disconnector is

verified. This means that the off-circuit

condition must be unconditionally verified

both on the upper and lower contacts of the

switch-disconnector.

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49.2

B) IT IS VALID FOR MICROSWITCH OF TYPE M1S 6610

41,

5

-0

+0,

5

49.2

A) IT IS VALID FOR MICROSWITCH OF TYPE CROUZET

-0

+0,

5

55

PANEL

11.5

11.5

PANEL

11.5

Figure 23: Auxiliary Ith limiter switch. It may be necessary to move the aux-

iliary switches into their service position when the lifting eyebolts have been

removed

11.5 Ithlimiter

It is necessary to adjust the centre of the switch knob of the

auxiliary switch to the centre of the pressure relief flaps hole.

Correct value of the adjustment of the auxiliary switches

height in the pressed position according to the particular type

of the switch is indicated on figure A) or B).

49.2 Pressure relief flap

22

3.6 IthLimitors

It is additional safety feature on the top of each unit. The

microswitch generates an immediate fault signal when the

overpressure flap is opened. Reaction time is less then 15 ms.

The signal from the microswi tch can be sent directly to trigger

the circuit-breaker OFF.

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3.7 Fast recovery device

UniGear switchgear can optionally be equipped with Fast

Recovery, a specific protection system.

This system is based on pressure sensors (Fig. 24), su itab ly

located in the switchgear and directly connected to the shunt

opening release installed in the circuit-breaker operating

mechanism (Fig. 25).

Figure 24: Pressure sensor Figure 25: Shunt opening release

Resetting the auxiliary contacts

Figure 26: Fast recovery system

Compressed air system

1

2

3

Figure 27: Testing equipment

1 Pressure reducer

2 Lever for opening the air valve

3 Manometer

The sensors detect the pressure rise front at the moment of

an internal arc and promptly open the circuit-breaker.

Thanks to the Fast recovery system, only the part invo lved

in the fault is selectively excluded in under 100 ms (including

the circuit-breaker opening time). Rapid elimination of the fault

along with the metal segregation between compartments and

the use of self-extinguishing materials drastically reduces any

possible damage.

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4.1 Condition on delivery

At the time of d ispatch, the UniGear panels are factory

assembled, the withdrawable parts are in the test position and

the doors are closed.

The factory-assembled panels are checked for completeness

in terms of the order and simultaneously subjected to routinetesting (normally without AC voltage testing of the busbars)

to IEC publication 62271-200, and are therefore tested for

correct structure and function.

The busbars are not assembled. The busbar mater ial,

fasteners and accessories are packed separately.

4.2 Packing

Available packing methods:

Polythene foil - storage t ime 1/2 year in clean and dry

environment

OSB boards - storage time 1/2 year in outdoor environment

according to IEC

Wood boxes - storage time 1 year in outdoor environment

according to IEC

According to the k ind of t ransport and country of destinat ion,

the panels remain unpacked or are welded in foil and packed

in seaworthy crates. A drying agent is provided to protect

them against moisture:

Panels with basic packing or without packing.

Panels with seaworthy or similar packing (including packing

for containerised shipments):

- Sealed in polyethylene sheeting

- Transport drying agent bags included

4. Dispatch and storage4.3 Transport

The transport units normally comprise individual panels and,

in exceptional cases, small groups of panels. The panels are

each fitted with four lifting eyebolts.

Transport pane ls upright. Take the high centre of grav ity

into account. Only ever carry out loading operations when

it has been ensured that all precautionary measures to

protect personnel and materials have been taken and use the

following:

Crane;

Fork-lift truck and/or;

Manual trolley jack.

Loading by crane:

Fit lifting ropes of appropriate load capacity with spring

catches (eyebolt diameter: 30 mm);

Keep an angle of at least 60 from the horizontal for the

ropes leading to the crane hook;

Suspend the unit using ALL four eyebolts!

For detailed information on switchgear handling, please refer

to chapter 4.6.

24

Figure 28: Handling by crane

1.5 lifting eyebolt

1.5

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4.4 Delivery

The responsibil ities of the customer when the switchgear

arrives at site include, but are not limited to, the following:

Checking the delivery for completeness and damage

(e.g. also for moisture and its detrimental effects). In

case of doubt, the packing must be opened and then

properly resealed, inserting new drying agent bags, when

intermediate storage is necessary;

If any quantities are short, or defects or transport damage

are noted, these must be:

- documented on the respective shipping document;

- notified to the relevant carrier or forwarding agent

immediately in accordance with the relative liability

regulations.

Note:

Always take photographs to document any major damage.

4.5 Intermediate storage

Optimum intermediate storage, where this is necessary,

without any negative consequences depends on compliance

with a number of minimum conditions for the panels and

assembly materials.

1. Panels with basic packing or without packing:

A dry well-ventilated store room with a climate in

accordance with IEC 60694;

The room temperature must not fall below 5 C;

There must not be any other negative environmental

influences;

Store the panels upright;

Do not stack panels;

Panels with basic packing:

- Open the packing, at least partially;

Panels without packing:

- Loosely cover with protective sheeting;

- Ensure that there is sufficient air circulation;

Check regularly for any condensation until installation is

started.

2. Panels with seaworthy or similar packing with internal

protective sheeting:

Store the transport units:

- protected from the weather;

- in a dry place;

- safe from any damage;

Check the packing for damage;

Check the drying agent (also see section 4.2):

- on arrival of the delivery;

- subsequently at regular intervals;

When the maximum storage period, starting from the date

of packing, has been exceeded:

- the protective function of the packing can no longer be

guaranteed;

- take suitable action if intermediate storage is to continue.

4.6 Handling

4.6.1 Switchgear

The switchgear sections are usual ly f ixed to wooden pallets.

Handling should be carried out by overhead or mobile cranes.

Otherwise, use rollers or fork lift trucks.

Weights and dimensions of each section are listed in the

shipping documents and in the p lant drawings.

4.6.1.1 Handling with overhead crane or mobile crane andunpacking

Handling the switchgear in the wood packing

The switchgear must be l ifted by crane and circular slings 1

(figure 29). The slings must be inserted according to the lifting

symbols marked on the crate.

Weight and lifting opening angle must be taken into account

when choosing the circular slings.

Figure 29: Handling the switchgear in the wooden crate

Switchgear handling

Unpacking

Remove the nails and crate lid and sides;

Open the compartment door and loosen the bolts fixing the

switchgear to the pallet;

Lift the cubicles by the crane following the instructions

below;

Remove the pallet;

Position the unloading shims;

Put the switchgear on the loading shims using the crane.

WARNING

Do not walk on the roof of the panels

(rupture points in pressure relief devices!).

The pressure relief devices and/or Ith

Limiters could be damaged.

WARNING

Only use a suitable balanced lifting system.

Should an accidental fault cause a leakage

of SF6, ventilate the room and carefullyfollow the safety procedures prescribed in

the IEC 1634 Standards.

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After unpacking, lift the unit groups by crane (figure 28). Use

the eyebolts (1.5) and the safety ropes.

After insta llat ion of the pane ls, remove the eyebolts used for

lifting.

4.6.1.2 Handling by rollers

Lift the switchgear section by overhead or mobile crane or

using jacks; remove the wooden pallet loosening the screws

fixing it to the switchgear section base.

Put a sturdy metal sheet between the rollers and the unit base

and place the switchgear on the sliding rollers.

4.6.1.3 Handling by transpallet or fork lift trucks

To guarantee stabil ity, the switchgear must not be lifted too

high. Check the alignment of the forks.

Sliding rollers

Metal sheet

4.6.2 Apparatus

The apparatus can be handled by cranes, fork lift

trucks or using the truck provided by ABB.

For each piece of apparatus follow the instructions

below.

Figure 30: Handling by rollers

Figure 31: Lifting switchgear packed in a wooden crate

Figure 32: Switchgear handling

WARNING

Only use rollers on a level floor.

Move the switchgear section avoiding any

possible tilting.

WARNING

Only use transpallets or fork lift trucks on alevel floor.

Move the switchgear section avoiding any

tilting.

WARNING

While handling do not put any stress on

the insulating parts and on the apparatus

terminals.

Before handling the apparatus, make sure

that the operating mechanism springs are

discharged and that the apparatus is in the

open position.

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4.6.2.1 Handling by crane

Circuit-breakers

Hook the lifting bolts to the relevant supports (figure 33).

While handling, pay the utmost attention not to put any stress

on the insulating parts or on the circuit-breaker terminals

(figure 34).

Before putting into service, remove all the lifting eyebolts.

Contactor Insert the lifting bar (1) centering it with the contactor;

Hook the bracket (2) to the lifting bar (1);

Hook the bracket (2) by the spring catch and lift the

contactor;

To remove the li fting equipment proceed in reverse order.

Figure 33: Correct handling

2

2

1

4.6.2.2 Handling by fork-lift trucks

Handling by fork-lift trucks can be carried out only after the

apparatus has been positioned on a sturdy support.

While handling, pay the utmost attention not to put any stress

on the insulating parts or on the circuit-breaker terminals.

Figure 34: Wrong handling

Figure 35: Mounting the lifting equipment

Figure 36: Handling by fork-lift trucks

WARNING

Do not insert the truck forks straight

underneath the apparatus but put the

apparatus on a sturdy support.

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(*)

(**)

3

4

3

4

1

4.6.2.3 Handling by service truck

For handling and inserting the apparatus into the switchgear,

use the service truck (Figure 37).

Figure 37:

(*) Handling direction for horizontal locking pin entry.

(**) Handling direction for exit of the horizontal locking pins.

22

In order to handle the circuit-breaker with the relevant truck,

follow the instructions below (figure 37):

hook the lifting bolts to the circuit-breaker supports and

align it above the truck (1):

press the handles (2) towards the circuit-breaker centre (*)

to insert the horizontal check pins (3);

put the circuit-breaker on the truck;

push the circuit-breaker towards the circuit-breaker

compartment and insert the truck into the guides until the

handles (2) are released (**) outwards and the horizontallocking pins go into the slots (4), locking the circuit-breaker.

When moving the switchgear on cylinders always put the

cylinders collinear (in parallel) with the front side of the

switchgear!

Always keep the switchgear in the vertical position!

Do not try to open the cable or the circuit-breaker

compartment doors, close the earthing switch or withdraw the

circuit breaker if an auxiliary voltage is not connected to the

switchgear!

Do not step on the pressure relief flaps!

Further warnings:

WARNING

Do not use the service truck for any

purpose other than handling ABBs

apparatus.

Fix the circuit-breaker to the truck beforemoving it.

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To carry out the optimum installation sequence and ensure high

quality standards, site installation of the switchgear should only be

carried out by specially trained and skilled personnel, or at least by

personnel supervised and monitored by responsible people.

In case higher IP is needed please follow the instructions described

in manual 1VLG100101.

5.1 General

On commencement of installation on site, the switch-room must be

completely finished, provided with lighting and the electricity sup-

ply, lockable, dry and with facilities for ventilation. All the necessary

preparations, such as wall openings, ducts, etc., for laying the power

and control cables up to the switchgear must already be complete.

Where switchgear panels have top-mounted structures for earthing

switches or instrument transformers, it must be ensured that the ceiling

height is sufficient for the opening travel of the pressure relief plates.

The ceiling must be high enough to allow the assembly of the pres-sure relief duct and/or top mouted VT box and earting switch box.

See table in capture 5.7.

Compliance with the conditions for indoor switchgear according to

IEC 60694, including the conditions for the minus 5 indoor tem-

perature class must be ensured.

5.2 Foundations

The fol lowing three basic methods of installing switchgear in

the switchroom are identified:

Method A installation on C profile base irons

As standard, i t is recommended to install the switchgear

on C profile base irons set into the concrete floor of the

switchroom. In this case, the units are fastened using the

special bolt blocks (ABB delivers these on request).

Method B installation on the levelled concrete floor

Installation directly on the levelled concrete floor makes

much higher demands on the floor levelling, which must, in

this case, fulfil the same tolerances as the base irons during

method A installation.

Fastening is carried out by anchoring bolts in the concrete

floor.

Method C installation on a raised false floor

In this case, fastening of the units is carried out by welding

outside panels to the steel floor frame in the places where

the frame is larger than the base of the switchgear, i.e. on the

outside latera l walls of the unit row. This method of installation

is not recommended if seismic resistance is required.

Generally, the following procedure for switchgear anchoring

can be recommended for any of the installation methods

mentioned:

1 The switchgear panels are bolted together in the front and

rear part to make one unit;

1) Pay attention to appropriate national standards.2) Applies to low voltage compartments of standard height.3) Approximate numbers depending on the type of panels.

Dimension chart of structural data

Rated voltage kV 12/17.5 kV 24 kV

Panel width FT mm 650 800 1000 800 1000

Aisle width 1)G mm 1450 1600 1800 1600 1800

Switchgear room door width mm 850 1000 1200 1000 1200

Switchgear room door

height 2)mm 2400 2400 2400 2525 2525

Opening in ceiling if

transported through roof:

Width mm 1000 1000 1200 1000 1200

Length mm 1500 1500 1500 1800 1800

Ceiling load3)

kg/m2

1200 1400 1400 900 850

5.2.1 Method of installation A Installation of the base

irons

The general foundat ion drawing is g iven in figures 38-72

according to the parameters of the units.

The C" shaped base irons can be supplied by ABB

together with the switchgear. Their installation is usually

carried out by personnel on site and should, if possible, be

performed under supervision of an ABB specialist. The base

irons must be installed in the slab before finishing the floor;

Rest the irons in the specified position on the concrete

floor as shown in the relevant foundation drawing and mark

out the places for drilling the holes. Then drill the holes for

anchoring bolts, i.e. for plugs 14 for fixing the base irons

in the floor. Then put the plugs in the holes and attach the

base irons to the floor loosely with bolts 13, without final

tightening so that any required levelling is possible.

Carefully level the base irons both longitudinally and

transversally over the entire length and to the correct height

by putting strips of suitable thickness under them and using

a levelling instrument.

2 Further structural data guidelines given provide a rough

calculation of the space required and the plan for designing the

room for a switchgear project.

If seismic resistance is not required, it is not necessary to attach each

switchgear panel to the floor or frame, but it suffices to fix outside panels

in each row of switchgear only.

If seismic resistance is required, it is necessary to attach each switchgear

panel to the floor or frame. To achieve seismic resistance the special fixing

system is used. This system preferably uses a steel floor frame with C

profile shape but moreover with an addition special fixing element please

contact ABB for details.

When the final building construction documents are drawn up, the

binding data supplied by ABB for a particular case must always be

taken into account!

29

5. Assembly of the switchgear at site

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Tolerances for laying the floor frame are

Evenness tolerance: 1 mm over a measuring length of 1 m

Straightness tolerance: 1 mm per 1m, but not more than

3 mm over the entire length of the frame.

After levelling the base irons, tighten bolts 13. The adjusted

position of the base irons on the concrete floor must not

be changed during this operation! Check again and, if

necessary, correct any deviations;

Weld Individual parts of the base irons together inside the

C" profile at the seams so that there is a mutual conductiveconnection.

Take any necessary measures for perfect earthing of the

base irons with galvanized steel strips with minimum

dimensions of 30 x 4 mm. Two earthing connections are

recommended for a panel row longer than approx. 5 panels;

When the floor top covering is applied, carefully backfill

the floor frame, leaving no gaps. The top edge of the floor

frame should be 2 mm above the finished floor surface; the

tolerance of this value is within the limits of 0 to 5 mm. This

facilitates erection and alignment of the switchgear panels.

In some cases, this means that the material thickness of an

additional floor covering to be fitted later must be taken intoaccount separately;

The base irons must not be subjected to any harmful impact

or pressure, particularly during the installation phase.

If these conditions are not respected, problems during

assembly of the switchgear and possibly with movement of

the withdrawable parts, as well as opening and closing of

the doors cannot be ruled out.

Attachment of the units to the C" shape base irons

The switchgear is at tached to the base irons by special bolt

blocks, which can be supplied on request.

Place the individual units of the switchgear in sequence

onto correctly levelled and installed base irons and level

them according to the relevant foundation drawings;

Level the units and then bolt them together in the front and

rear part;

To attach them to the base irons, insert specially prepared

bolt blocks in the fixing holes in the bottom of the units and

tighten them.

5.2.2 Method of installation B Fixing with anchoring

bolts to concrete floor

The general foundation drawing is g iven in f igures 38 - 72

according to the parameters of the units.

Clean the switchgear installation area carefully;

On the slab, visibly trace the perimeter of all the units

making up the switchgear according to the relevant

drawing, taking the minimum wall and obstacle clearances

into account;

Level the floor both longitudinally and transversally,

evenness tolerance is 1mm over a measuring length of

1 m;

Drill the floor at the intended fixing points, referring to the

slab drilling drawings. To make the holes, use a hammer

drill with a bit according to the steel plugs used;

Insert the plugs in the holes and put the individual panels on

the traced perimeters of the units to create the switchgear;


rear part;

Fix the units with bolts with special washers (the coupling

material is supplied on request);

In the case of a metal floor, use the attachment according

to the figure. To make the holes, use a drill with a suitable

bit for the type of fixing to be made (through or threaded

hole).

5.2.3 Method of installation C Fixing to a raised falsefloor

The general foundation drawing is given in figures 38 - 72

according to the parameters of the units. In most cases,

the floating floor is created by a steel structure in which the

welded steel frame is installed. A frame produced using

suitable steel profiles is used. ABB does not supply this

frame.

Clean the installation area.

After installation of the frame, take any necessary measures

for perfect earthing of the frame with galvanized steel strips

with min. dimensions 30 x 4mm. Two earthing connections

are recommended for a panel row longer than approx. 5panels.

Place the units on the frame according to the relevant

foundation drawings, taking the minimum wall and obstacle

clearances into account.


rear part.

Carry out attachment by welding the outside panels to the

steel floor frame in the place where the frame juts out from

the switchgear bottom, i.e. on the outside lateral walls of

the unit row. This method of installation is not recommended if seismic resistance is required.

In the case of a metal floor, use attachment according tothe figure. To make the holes, use a drill with a suitable bit

for the type of fixing to be made (through or threaded hole).

30

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Figure 38: UniGear 12/17,5 kV up to the nominal current of T-offs 2500 A

Guideline structural data for foundation frame on concrete floor

It is not valid for the panel with switch-disconnector

C Typical panel depth C = 1340 mm however always consider annotation 2)

G Width of operating aisle

FT Panel width

TB Door width = FT + 200 mm

TH Door height = panel height + 200 mm

1) Minimum dimensions; recommended space 500 mm

2) Dimension must be verified in documentation of the relevant order

10 Door

11 Rear cover 12 Side end cover

13 Screw

14 Steel dowel

1)

1) 2)

1)

1)

2)

1)

1)

1)

600 100

FT=800

843

TB

CG

50

200

C 30

cca 20

75

80

G

75

FT=1000

TH

Documents

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