Guide_UniGear_EN-1VLM000005 Rev.8-2008.01.31.pdf

UniGearTechnical Guide

11

2

3

4

5

6

7

8

UniGear single busbar system 3

UniGear double level 35

UniGear double busbar system 43

Marine applications 59

General characteristics 79

Apparatus 113

Measuring instruments 127

Data 145

3UniGear single busbar system

1

Page Chap.

Description 4 1.1

Compartments 4 1.1.1

Components of the structure 5 1.1.2

General electrical characteristics 10 1.1.3

Panel overview 11 1.1.4

Panel width and pole distances of apparatus 12 1.1.5

Overall dimensions of panels 13 1.1.6

Typical conventional units 15 1.2

General notes 15 1.2.0

Incoming-outgoing unit (IF) 16 1.2.1

Incoming-outgoing unit with measurement (IFM) 20 1.2.2

Bus-tie (BT) 24 1.2.3

Bus riser (R) 25 1.2.4

Bus riser with measurement (RM) 26 1.2.5

Incoming-outgoing unit direct (IFD) 27 1.2.6

Incoming-outgoing unit direct with measurement (IFDM) 28 1.2.7

Incoming unit with capacitors (IFC) 29 1.2.8

Measurement unit (M) 31 1.2.9

Disconnector feeder (DF) 32 1.2.10

Busbar applications 33 1.3

Current transformers 33 1.3.1

Voltage transformers 33 1.3.2

Earthing switch 33 1.3.3

Incoming duct 34 1.3.4

Voltage indication 34 1.3.5

Description

4

1.1.1 Compartments

The typical units of the UniGear switchgear consistof up to a maximum of five compartments segre-gated from each other by means of metal partitions(incoming/outgoing unit with measurements shownin the figure).For details of the other units, please see chapter 2.

Low voltage compart-ment

Gas exhaust duct

Busbar compartment

Feeder compartment

Circuit-breaker

Circuit-breakercompartment

Withdrawable voltagetransformers with fuses

Separate compartmentfor VTs is available indeep version of Unigearpanels only.

1

2

3

4

5

6

7

1

2

3

4

6

5

7

1.1

5

Low Voltage compartment

Gas exhaust duct

Gas exhaust flaps

Segregations

Side walls

Basic assembly

1.1.2 Components of the structure

1.1.2.1 Hot-galvanized steel sheet

Type: EN 10143 B5 DX51D AZ 150NACO

Thickness: 2 mm (some details 1 or 1.5mm)

2

3

4

5

6

1

2

65

3

4

1

Weight (average): 310450 KgUse: supporting structure, compart-

ments, segregations, gasexhaust duct, gas exhaust flaps.

Description

6

1.1.2.2 Painted steel sheet

Type: UNI EN 10130 Fe P01Thickness: 2 mmStandard colour: RAL7035 (doors and side

covers)Thickness of painting: 65 mmUse: auxiliary compartment

doors, circuit-breaker andfeeder doors, side covers.

1

2

3

4

Low voltage compartmentdoor

Circuit-breaker compartmentdoor

Feeder compartment door

Side covers (closing panels ofthe right-hand and left-handunits of the switchgear.

1.1.2.2.1 Weight of the paint used

1

2

4

3

12-17.5 kV Kg

550 mm wide units 0.3




24 kV Kg



1.1

7

1.1.2.3 Copper

Type: UNI EN 5649 Cu ETPWeight: 52...320 KgUse: main busbars, top and bottom

branches, branches for CT and VT,cable connections, earthing switchfixed contacts, earthing busbar.

The main busbar system and the branches aresupplied with insulating covering for 17.5 and24 kV level. On request insulation can be suppliedfor 12 kV level.Also on request, the main busbar system and thebranches can be silver plated or tinned.

Earthing busbar dimensions: 30x8 mm standard,40x10 mm on request.

In Ith Panel width Busbar dim. Tee-offs dim. Insulation

A kA mm mm mm

Un 12 kV

630 31.5 650 1x80x10 1x60x10 no

1000 31.5 650 1x80x10 1x60x10 no

1250 31.5 650 1x80x10 1x80x10 no

1250 40 800 1x80x10 1x80x10 no

1600 31.5/40 800 2x80x10 2x80x10 no

2000 31.5/40 800 2x80x10 2x80x10 no

1600 31.5/40 1000 2x80x10 2x80x10 no

2000 31.5/40 1000 2x80x10 2x80x10 no

2500 31.5/40 1000 2x80x10 2x100x10 yes

3150 31.5/40 1000 2xD100/12 2x120x10 yes

3600 31.5/40 1000 2xD100/12 2x120x10 yes

4000 31.5/40 1000 2xD100/12 2x120x10 yes

Un 17.5 kV

630 31.5 650 1x80x10 1x60x10 yes

1000 31.5 650 1x80x10 1x60x10 yes

1250 31.5 650 1x80x10 1x80x10 yes

1250 40 800 1x80x10 1x80x10 yes

1600 31.5/40 800 2x80x10 2x80x10 yes

2000 31.5/40 800 2x80x10 2x80x10 yes

1600 31.5/40 1000 2x80x10 2x80x10 yes

2000 31.5/40 1000 2x80x10 2x80x10 yes

2500 31.5/40 1000 2x80x10 2x100x10 yes

Un 24 kV

1000 25 800 1x80x10 1x60x10 yes

1250 25 800 1x80x10 1x80x10 yes

1000 25 1000 1x80x10 1x60x10 yes

1250 25 1000 1x80x10 1x80x10 yes

1600 25 1000 2x80x10 2x80x10 yes

2000 25 1000 2x80x10 2x80x10 yes

2300 25 1000 2x80x10 2x100x10 yes

2500 25 1000 2x80x10 2x100x10 yes

Description

8

1

2

3

4

5

6

7

Main busbars

Top branches

VT branches

Earthing busbar

Bottom branches

Earthing switch fixed contacts

Cable connections

1

2

6

7

5

3

4

1.1

9

1

2

3

4

5

6

Voltage transformers

Busbar side chambers

Cable side chambers

Current transformers

Busbar compartmentsegregation bushing

Inspection window(CB door)

CB poles

CB contact arms

Insulator

1.1.2.4 Insulating materials

Type: Epoxy resinWeight: see chap. 7Use: CTs, VTs, sensors, insulators (in

variable quantities, see single units -chap. 2 and 3), chambers.

7

1

26

5

3

4

7

8

9

8

9

Type: BPTM thermo-shrinking polymerWeight (average): 2-5 KgUse: insulating covering of busbars

and branches (if applied).

Type: GlassWeight: 0.4 KgUse: Inspection windows.

Description

10

1.1.3 General electrical characteristics

1.1.3.1 Earthing switch electrical characteristics

1) For 1s

Electrical characteristics of Double level units are listed in chapter 2.Electrical characteristics of Double busbar system are listed in chapter 4.Unit 24 kV/31,5 kA available with HD4 only.

Earthing switch with making capacity 12 kV 17.5 kV 24 kV

Rated short-time withstand current [kA for 3s] 550 mm 25 25 650 mm 31.5 31.5 800, 1000 mm 40, 50 1) 40 25; 31,5

Making capacity kAp 80, 120 100 63; 80

Switchgear 12 kV 17.5 kV 24 kV

Rated voltage kV 12 17.5 24

Rated insulation 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 short-time withstand current (max.) kA (3s) 50 40 25; 31,5

Peak current (max.) kA 125 100 63; 80

Internal arc withstand current (max.) kA (1s) 40; 50 40 25; 31,5

Branch connector rated currents A 630 6301000 10001250 1250 12501600 1600 16002000 2000 20002500 2500 25003150 31503600 36004000 4000

Main busbar rated currents A 630 630 6301250 1250 12501600 1600 16002000 2000 20002500 2500 25003150 3150 31503600 36004000 4000

1.1

11

0 Available with or without measurement1 Available with V-Max2 Available with V-Contact3 Available with HD4, VD4 and VM14 Available with VD4 and VM15 Metering truck available

1.1.4 Panel overview

IF - Incoming feeder RM - Bus riser with metering M - Metering unitBR - Bus riser BC - Bus coupler (with a breaker) IFM - Incoming feeder with metering

12 kVUnit width 550 mm 650 mm 800 mm 1000 mm

Panel \ Current 630 1250 400 630 1000 1250 1250 1600 2000 2500 1600 2000 2500 3150 3600 4000

IF 1 1 2 1, 3 1, 3 1, 3 3 3 3 4 4 3 3 4 4

BR 0 0 0 0 0 0 0 0 0

RM 5 5 5

BC 1 1 1, 3 3 3 3 3 4 4

M 5 5 5 5

17.5 kVUnit width 550 mm 650 mm 800 mm 1000 mm

Panel \ Current 630 1250 630 1000 1250 1250 1600 2000 2500 1600 2000 2500 3150 3600 4000

IF 1 1 1, 3 1, 3 1, 3 3 3 3 3 3 3 3 4 4

BR 0 0 0 0 0 0 0

RM 5 5 5 5

BC 1 1 1, 3 3 3 3 3 4 4

M 5 5 5 5

24 kV

Unit width 800 mm 1000 mm

Panel \ Current 1250 1600 2000 2500 1600 2000 2500

IF 3 3 3 3

BR 0 0 0 0 0

RM 5 5 5 5

BC 3 3 3 3

M 5 5 5

Busbar applications Voltage Earthing Incomingtransformers switch duct

IF Incoming feeder

IFM Incoming feeder with measurement

Unit 24 kV/31,5 kA available with HD4 only.

Description

12

1.1.5 Panel width and pole distances of apparatus

B B

C

A

C

*) Side cover (painted - see chapter 1.2.2) widens the switchgear by 40 mm on each side.

UniGear 12/17.5 kV

A *) B C Apparatus

550 150 195 V-max 630-1250A

650 150 205 HD4 630-1250A / VD4 630-1250A / V-Contact 400A / VM1 630-1250A

800 210 310 HD4 1250-2000A / VD4 1250-2000A / VM1 1250-2000A

1000 275 310 12 kV: HD4 2500-3150A / VD4 1600-4000A / VM1 1600-4000A17.5 kV: VD4 1600-3150 A / VM1 1600-3150 A

UniGear 24 kV

A *) B C Apparatus

800 210 310 HD4 630-1250A / VD4 630-1250A / VM1 630-1250A

1000 275 310 HD4 1000-2500A / VD4 1000-2500A / VM1 1000-2500A

1.1

13

1.1.6 Overall dimensions of panels

1.1.6.1 Dimensions of 12/17.5 kV units with circuit-breaker or contactor

1) Height of the control cabinet is 580/705/1100 mm, except for the 3150/4000 A panels, where it is only available in heights 705/1100 mmheights.

2) 1000 mm on request.3) Up to 2500 A - panel depth with HD4 circuit-breaker including combination with them is 1340 mm, in other cases A=1300 - however

always consider note 5)4) For 3150 A and 4000 A - panel depth with HD4 circuit-breaker including combination with them is 1390 mm, in other cases B=1350 mm -

however always consider note 5)5) Dimension must be verified according to documentation of the relevant order.6) Feeders equipped with contactor "V-Contact" are 650 mm wide up to the 50 kA short-time current.7) Unigear type ZS1 series 550 is 2200 or 2595 mm high only.8) Unigear type ZS1 series 12 kV/50 kA has depth 1390 mm.*) Side cover (painted see chapter 1.2.2) widens the switchgear by 40 mm on each side

Dimension mm

Height A 2100/2200/2595 1) 7)

Width B *)

- Feeder panels series 550 550- Feeder panels up to 1250 A (up to 31.5 kA) 6) 650- Feeder panels up to 1250 A (above 31.5 kA) 800- Feeder panels 1600 - 2000 A 800 2)

- Feeder panels above 2000 A 1000

Depth C 1300/1340 3) or 1350/1390 4) 8)

Height of the basic part of panel D 2100E 1495

Description

14

1.1

1.1.6.4 Dimensions of panels with the NALF 24 kV switch-disconnector

Dimension mm

Height A 2200/2325/2720 1)

Width B- Outgoing and incoming panels with 1000- switch-disconnector 630 A

Depth C 1520/1560 2)

Height of basic part of panel D 2200E 1620

Dimension mm

Height A 2200/2325/2720 1)

Width B- Feeder panels up to 1250 A 800 2)

- Feeder panels above 1250 A 1000

Depth C 1520/1560 3)/1700 5)

Height of the basic part of panel D 2200E 1620

1.1.6.2 Dimensions of 24 kV units with circuit-breaker

1) Height of the control cabinet is 580/705/1100 mm.2) 1000 mm on request.3) Panel depth with HD4 circuit-breaker including combination with them is 1560 mm, in other cases C=1520 mm - however

always consider note 4)4) Dimension must be verified according to documentation of the relevant order.5) Unit 24 kV/31,5 kA has depth 1700 mm.

1.1.6.3 Dimensions of panels with the NALF 12 and 17.5 kV switch-disconnector

Dimension mm

Height A 2075/2200/2595 1)

Width B- Outgoing and incoming panels with 800- switch-disconnector 630 A

Depth C 1300/1340 2)

Height of basic part of panel D 2100E 1495

1) Height of control cabinet is 580/705/1100 mm.2) The depth of panel with the switch-disconnector in combination with HD4 circuit-breaker panels is recommended at 1340 mm, in other cases 1300 mm always take into account note 3)3) The dimensions must be verified according to the documentation of relevant order.

1) Height of control cabinet is 580/705 /1100 mm2) The depth of panel with the switch-disconnector in combination with HD4 circuit-breaker panels is recommended at 1560 mm,

in other cases 1520 mm always take into account the note 3)3) The dimensions must be verified according to the documentation of relevant order

1.2

15

Typical conventional units

1.2.0 General notes

Each medium size current transformer can bereplaced by an ABB KEVCD sensor. The earthingswitch is not a compulsory switchgear acces-sory.

Voltage transformers in fixed version are notequipped with fuses.

Low voltage compartment height is 705 mm if adifferent one is not mentioned. Other heights are580 mm and 1100 mm.

Total height of the unit includes the low voltagecompartment and is without an exhaust duct.

Indicated number of cables is the maximumavailable. Voltage transformers occupy oneposition as well as surge arresters.

Rating of panels with vacuum contactor isalways 400 A.

Voltage transformers cannot have a fuse statusindication if they are located in the cable com-partment.

Dimensions of panels may vary depending onproject requirements.


16

W = 650 mm

1.2.1 Incoming-outgoing unit (IF)

1.2.1.1 Bottom cable entry

1) 31.5 kA version2) 40 kA version3) 25 kA version

12-17.5 kV 24 kV

Width mm 550 650 800 1000 800 1000

Height mm 2200 2200 2200 2200 2325 2325

Height with gas exhaust duct mm 2675 2675 2675 2775 2775 2775

Depth mm 1340 1340 1340 1340/1390 15603)/1700 15603)/1700

Rated current A630 3) 1250 3) 1) 2) 1600 1) 2) 2000 1) 2) 2500 3150 3600 4000

Earthing switch

Number of cable connections (maximum) No. 2 3 6/3 2) 6 6 6

Number of CTs per phase (alternative combinations)1 medium size 1 long size 2 medium size1 medium and 1 long size1 ring type

Number of VTs per phase (alternative combinations)1 fixed 2 fixed1 withdrawable with fuses

1.2

17

1.2.1.2 Bottom cable entry - deep version

12-17.5 kV 24 kV

Width mm 650 800 1000 800 1000

Height mm 2200 2200 2200 2325 2325

Height with gas exhaust duct mm 2675 2675 2675 2775 2775

Depth mm 1840 1840 1840 2170 2170

Rated current A6301250 1) 2) 1600 2000 2500 3150 3600 4000

Earthing switch

Number of cable connections (maximum) No. 4 6 6 6 6

Number of CTs per phase (alternative combinations)1 medium size 1 long size 2 medium size 1 medium and 1 long size

Number of VTs per phase (alternative combinations)1 fixed 2 fixed 1 withdrawable with fuses

W = 650 mm

1) 31.5 kA version2) 40 kA version


18

1.2.1.3 Top cable entry - deep version


12-17.5 kV 24 kV

Width mm 650 800 1000 800 1000 1000

Height mm 2200 2200 2200 2325 2325 2325


Depth mm 1840 1840 1840 2170 2170 2170

Rated current A6301250 1) 2) 1600 2000 2500 3150 3600 4000

Earthing switch

Number of cable connections (maximum) No. 3 3 4 4 4 4



W = 650 mm

1.2

19

1.2.1.4 Top busbar entry - deep version


12-17.5 kV 24 kV

Width mm 650 800 1000 800 1000

Height mm 2200 2200 2200 2325 2325


Depth mm 1840 1840 1840/1890 2170 2170

Rated current A6301250 1) 2) 1600 2000 2500 3150

Earthing switch

Number of cable connections (maximum)




20

1.2.2 Incoming-outgoing unit with measurement (IFM)

1.2.2.1 Bottom cable entry

12-17.5 kV 24 kV

Width mm 650 800 1000 800 1000 1000

Height mm 2200 2200 2200 2325 2325 2325


Depth mm 1340 1340 1340 1560 15603)/1700 15603)/1700

Rated current A630 1250 1) 2) 1600 2000 1) 2) 2500 3150 3600 4000

Earthing switch


Number of CTs per phase (alternative combinations)1 medium size 1 long size 2 medium size1 medium and 1 long size

Number of VTs per phase (alternative combinations)1 fixed2 fixed1 withdrawable with fuses


1.2

21

1.2.2.2 Bottom cable entry - deep version

12-17.5 kV 24 kV

Width mm 800 1000 800 1000 1000

Height mm 2200 2200 2325 2325 2325


Depth mm 1840/1890 1840/1890 2170 2170 2170

Rated current A6301250 1600 2000 1) 2) 2500 3150 3600 4000

Earthing switch



Number of VTs per phase (alternative combinations)1 fixed2 fixed1 withdrawable with fuses 3)

1) 31.5 kA version2) 40 kA version3) Transformers may be in a segregated compartment.


22

1.2.2.3 Top cable entry - deep unit

12-17.5 kV 24 kV

Width mm 650 800 1000 800 1000 1000

Height mm 2200 2200 2200 2325 2325 2325


Depth mm 1840 1840 1840/1890 2170 2170 2170

Rated current A630 1250 1600 2000 2500 3150 3600 4000

Earthing switch




1) Transformers can be in a segregated compartment.

1.2

23

12-17.5 kV 24 kV

Width mm 650 800 1000 800 1000

Height mm 2200 2200 2200 2325 2325


Depth mm 1840 1840/1890 1840/1890 2170 2170

Rated current A630 1250 1600 2000 2500 3150 3600 4000

Earthing switch




1.2.2.4 Top busbar entry - deep unit

1) Transformers can be in a segregated compartment.


24

12-17.5 kV 24 kV

Width mm 550 650 800 1000 800 1000

Height mm 2200 2200 2200 2200 2325 2325


Depth mm 1340 1340 1340/1390 1340/1390 15603)/1700 15603)/1700

Rated current A6301250 1) 1600 2000 2500 3150 3600 4000

Earthing switch




1.2.3 Bus-tie (BT)

1) 40 kA version2) 25 kA version

1.2

25

1.2.4 Bus riser (R)

12-17.5 kV 24 kV

Width mm 650 800 1000 800 1000

Height mm 2200 2200 2200 2325 2325


Depth mm 1340 1340 1340 15603)/1700 15603)/1700

Rated current A6301250 1) 2) 1600 1) 2) 2000 1) 2) 2500 1) 2) 3150 3600 4000 1) 2)

Earthing switch


Number of CTs per phase (alternative combinations)1 medium size1 long size2 medium size1 medium and 1 long size

Number of VTs per phase (alternative combinations)1 fixed *) 2 fixed1 withdrawable with fuses

1) 31.5 kA version2) 40 kA version3) 25 kA version*) Available only as a DTO (Design to order).


26

1.2.5 Bus riser with measurement (RM)

12-17.5 kV 24 kV

Width mm 650 800 1000 800 1000

Height mm 2200 2200 2200 2325 2325


Depth mm 1340 1340 1340 15603)/1700 15603)/1700

Rated current A6301250 1) 2) 1600 1) 2) 2000 1) 2) 2500 1) 2) 3150 3600 4000 1) 2)

Earthing switch





1.2

27

1.2.6 Incoming-outgoing unit direct (IFD)


12-17.5 kV 24 kV

Width mm 650 800 800 1000

Height mm 2200 2160 2325 2325

Height with gas exhaust duct mm 2675 2675 2775 2775

Depth mm 1340 1340 1560 1560

Rated current A630 1)1250 1) 2) 160020002500 1)

Earthing switch

Number of cable connections (maximum) No. 3 4 4 4




28

1.2.7 Incoming-outgoing unit direct with measurement (IFDM)

12-17.5 kV 24 kV

Width mm 650 800 800 1000

Height mm 2200 2200 2325 2325


Depth mm 1340 1340 1560 1560

Rated current A6301250 1) 2) 1600 2000 2500

Earthing switch





1.2

29

1.2.8 Incoming unit with capacitors (IFC)

12-17.5 kV 24 kV

Width mm 550 650 800 1000 800 1000

Height mm 2200 2200 2200 2200 2325 2325


Depth mm 1300 1340 1340 1340 1560 1560

Rated current A63012501600200025003150

Earthing switch



Number of VTs per phase (alternative combinations)1 fixed2 fixed1 fixed with fuses1 withdrawable with fuses1 fixed and 1 withdrawable with fuses

This solution is treated as a DTO (Design To Order)every time. Please contact producer for this typeof panel.

The characteristics and number of CTs can bedifferent from the ones described according to thetype of capacitors used, the installed power andthe use of damping reactances and surge arrest-ers.


30

1.2.8.1 Deep version

This solution is treated as a DTO (Design To Order)every time. Please contact producer for this typeof panel.

12-17.5 kV 24 kV

Width mm 650 800 1000 800 1000

Height mm 2200 2200 2200 2325 2325


Depth mm 1840 1840 2170 2170 2170

Rated current A63012501600200025003150

Earthing switch



Number of VTs per phase (alternative combinations)1 fixed2 fixed1 fixed with fuses1 withdrawable with fuses1 fixed and 1 withdrawable with fuses

The characteristics and number of CTs can bedifferent from the ones described according to thetype of capacitors used, the installed power andthe use of damping reactances and surge arrest-ers.

1.2

31

1.2.9 Measurement unit (M)

Voltage transformers are located in CB compartment.Transformers can be equipped with fuse status indication in 12 and 24 kV panels.1) 12 kV only, available from 20062) 12 kV/50 kA version has depth 1390 mm3) 24 kV/31,5 kA version has depth 1700 mm

12-17.5 kV 24 kV

Width mm 550 1) 650 800 800

Height mm 2200 2200 2200 2325


Depth mm 1340 1340 1340/13902) 1560/17003)

Fault current (max.) kA 25 31.5 50 25

Rated current A630 1250 1600 2000 2500 3150 3600 4000

Earthing switch

Number of cable connections (maximal)


Number of VTs per phase (alternative combinations)1 fixed2 fixed1 withdrawable with fuses 1 fixed and 1 withdrawable with fuses


32

1.2

1.2.10 Disconnector feeder (DF)

12-17.5 kV 24 kV

Width mm 800 1000

Height mm 2200 2325

Height with gas exhaust duct mm 2675 2775

Depth mm 1340 1560

Rated current A630 1) 1)

Earthing switch

Number of cable connections (maximum) No. 1 1

Number of CTs per phase1 medium size 1 long size2 medium size1 medium and 1 long size


1) The rated current depends on the fuses used.

33

Busbar applications

1.3

Transformers are installed in an additional box on the top of the switchgear. This feature is available up to 50 kA.The box can be combined with LV Compartment 705 mm high.If fault current of switchgear is 31.5 kA or higher please contact manufacturer.Height of the panel with this box is 2684 mm (12, 17.5 kV) and 2812 mm (24 kV).

1.3.1 Current transformers

1.3.2 Voltage transformers

1.3.3 Earthing switch

Transformers are installed in busbar compartment inside a bus-riser panel. This feature is available up to 31.5 kA.Depth of the panel may increase.

The earthing switch is installed in an additional box on the the top of the switchgear. This feature is available up to 31.5 kA/3 s and 40 kA/1 s.The box can be combined with LV Compartment 705 mm high.Height of the panel with this box is 2684 mm (12, 17.5 kV) and 2812 mm (24 kV).

12-17.5 kV 24 kV

Width mm 550 650 800 1000 800 1000

Busbar rated current A

1000

1250

1600

2000

2500

3150

12-17.5 kV 24 kV

Width mm 550 650 800 1000 800 1000

Without bushings

With bushings

12-17.5 kV 24 kV

Width mm 550 650 800 1000 800 1000

Short circuit current kA

25

31.5

40

Busbar applications

1.3

34

1.3.4 Incoming duct

A busbar duct is available either in fixed or modular (telescopic) version.For details please see the instruction manual for modular busbar ducts (document number 1VLM000021)

1.3.5 Voltage indication

12-17.5 kV 24 kV

Width mm 550 650 800 1000 800 1000

Busbar rated current A

1250

1600

2000

2500

3150

12-17.5 kV 24 kV

Width mm 550 650 800 1000 800 1000


25

31.5

40

35

UniGear double level

2

Page Chap.

Double incoming feeder 36 2.1

Bus-tie & Incoming/outgoing feeder 37 2.2

Riser with metering & Incoming/outgoing feeder 38 2.3

Connection unit & Incoming/outgoing feeder 39 2.4

Connection unit with metering & Incoming/outgoing feeder 40 2.5

Electrical characteristics - Double level units 41 2.5.1

Double incoming feeder

36

2.11s

t (g

roun

d) l

evel

2nd

(up

per

) lev

el

1) The height of the switchgear in the compound configuration with simple and double level is the same as that of the double level unit.

12, 17.5 kV

Width mm 750 750 900 900

Height mm 2698 2698 2698 2698

Height with gas exhaust duct mm 2698 1) 2698 1) 2698 1) 2698 1)

Depth mm 1976 1976 1976 1976

Rated current A630 1000 1250 1600

Earthing switch 1st level 2nd level

Number of cable connections 1st level No. 3 3 3 3For each phase 2nd level 3 3 3 3

Number of CTs per phase (alternative combinations) -1st level

1 medium size 1 long size 2 medium size1 medium and 1 long size

Number of CTs per phase (alternative combinations) -2nd level


Number of VTs per phase (alternative combinations) -1st level

1 fixed 1 withdrawable with fuses

Number of VTs per phase (alternative combinations) -2nd level


37

Bus-tie & Incoming/outgoing feeder

2.21s

t (g

roun

d) l

evel

2nd

(up

per

) lev

el

1) Not applicable for second level

12, 17.5 kV

Width mm 750 750 900 900

Height mm 2698 2698 2698 2698


Depth mm 1976 1976 1976 1976

Rated current A630 1) 1000 1250 1600






1 medium size 1 long size 2 medium size 1 medium and 1 long size




1 fixed1 withdrawable with fuses

Riser with metering & Incoming/outgoing feeder

38

2.3


1st

(gro

und

) lev

el2n

d (u

pp

er) l

evel

With

dra

wab

le

12, 17.5 kV

Width mm 750 750 900 900

Height mm 2698 2698 2698 2698


Depth mm 1976 1976 1976 1976

Rated current A630 1) 1000 1250 1600






1 medium size1 long size2 medium size1 medium and 1 long size





39

Connection unit & Incoming/outgoing feeder

2.41s

t (g

roun

d) l

evel

2nd

(up

per

) lev

el


12, 17.5 kV

Width mm 750 750 900 900

Height mm 2698 2698 2698 2698


Depth mm 1976 1976 1976 1976

Rated current A630 1) 1000 1250 1600











Connection unit with metering & Incoming/outgoing feeder

40


1st

(gro

und

) lev

el2n

d (u

pp

er) l

evel

With

dra

wab

le

12, 17.5 kV

Width mm 750 750 900 900

Height mm 2698 2698 2698 2698


Depth mm 1976 1976 1976 1976

Rated current A630 1) 1000 1250 1600











41

2.5

2.5.1 Electrical characteristics - Double level units

Rated voltage

Rated insulation voltage

Rated power frequency withstand voltage

Rated lightning impulse withstand voltage

Rated frequency

Rated short-time withstand current (max.)

Peak current (max.)

Internal arc withstand current (max.)

Main busbar rated current (max.)

Branch connection rated current

17.5

17.5

38

95

50-60

40

100

40n/a

1600

630100012501600

12

12

28

75

50-60

50

125

4050

1600

630100012501600

kV

kV

kV 1 min.

kV

Hz

kA 3s

kA

kA 1skA 0.5s

A

A

43

3UniGear double busbar system

Page Chap.

Panel design and structure 44 3.1

Compartments 44 3.1.1

Insulating materials 45 3.1.2

General electrical characteristics 46 3.2

Dimensions of panels 47 3.3

Dimensions of 12/17.5 kV units 47 3.3.1

Dimensions of 24 kV units 48 3.3.2

General notes 49 3.4

Incoming-outgoing unit (IF) 50 3.5

Feeder up to 3150A 50 3.5.1

Feeder over 2500A 51 3.5.2

Bus coupler 52 3.6

Longitudinal bus coupler - bus-tie part 52 3.6.1

Longitudinal bus coupler - combined bus riser part 53 3.6.2

Longitudinal bus coupler - bus riser part with a metering truck 54 3.6.3

Transverse bus-tie 55 3.6.4

Measurement unit (M) 56 3.7

Busbar applications 57 3.8

Voltage transformers 57 3.8.1

Earthing switch 57 3.8.2

Panel design and structure

44

3.1.1 Compartments

24kV panel is shownBusbar system B is connected to the feederFor components of the structure please see chapter 1.

1

2

3

4

5

6

7

8

9

Low voltage compartment

Gas exhaust duct

Busbar compartments

Feeder compartment

Circuit-breaker

Circuit-breaker compartment

Line disconnectors

Gear and limit switches of linedisconnectors

Motor drives for linedisconnectors

1

2

3B

4

5

6

7A

8

9

2

3A

4

7B

3.1

45

1

2

3

4

5

6

Line disconnector covers

Busbar side chambers

Cable side chambers

Current transformers

Busbar compartmentsegregation bushings

Insulating covers

CB poles

CB contact arms

Insulators

Busbar system bushings

7

8

9

3.1.2 Insulating materials

Type: Epoxy resinWeight: see chap. 7Use: CTs, VTs, sensors, insulators (in

variable quantities), chambers,bushings.

Type: BPTM thermo-shrinking polymerWeight: (average): 2-5 KgUse: Insulating covering of busbars and

branches (if applied).

12

3

4

5A

6

7

8

9

5B

6

6

10

10

24kV panel is shownBusbar junction covers only shown on system BFor other components of the structure please see chapter 1.

Type: PolyesterWeight: (average): 6 KgUse: Covers on line disconnectors (if

applied), holding brackets s for rodsof the line disconnectors.

Type: ABS (Akrylonitril butadien styren)Weight: (average): 1 KgUse: Busbar junction covers.

General electrical characteristics

46

3.2

1) Separate feeders for A and B busbar system. See chapter 4.5.22) Planned

Switchgear 12 kV 17.5 kV 24 kV

Rated voltage kV 12 17.5 24

Rated insulation 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 short-time withstand current (max.) kA (3s) 31.5 31.5 25

Peak current (max.) kA 125 100 63

Internal arc withstand current (max.) kA (1s) 31.5 25 25

Branch connector rated currents A630 630 6301250 1250 12501600 1600 16002000 2000 20002500 2500 2500 1)

3150 1) 3150 1)

Main Busbars rated currents A 1250 1250 12501600 1600 16002000 2000 20002500 2500 25003150 3150

3600 2) 3600 2)

4000 2) 4000 2)

47

Dimensions of panels

3.3

3.3.1 Dimensions of 12/17.5 kV units

B

D A

E

C

1) Height of the auxiliary compartment is 705/1100 mm*) Side cover (painted parts see chapter 1.2.2) widens the switchgear by 40 mm on each side

Dimension mm

Height without a gas duct A 2200/2595 1)

Height with a gas duct 2700

Width B *)

- Feeder panels up to 1250 A (up to 31.5 kA) 650- Feeder panels 1600 - 2000 A 800- Feeder panels above 2000 A 1000

Depth C 2021

Height of the basic part of panel (without LV compartment) D 2026E 2100

Dimensions of panels

48

3.3

3.3.2 Dimensions of 24 kV units

1) Height of the control cabinet is 705/1100 mm*) Side cover (painted parts see chapter 1.2.2) widens the switchgear by 40 mm on each side

Dimension mm

Height without a gas duct A 2400/2720 1)

Height with a gas duct 2700/2720 1)

Width B *)

- Feeder panels up to 1250 A (up to 31.5 kA) 650- Feeder panels 1600 - 2000 A 800- Feeder panels above 2000 A 1000

Depth C 2570

Height of the basic part of panel (without LV compartment) D 2400E 1620

49

General notes

3.4

Each medium size current transformer can bereplaced by an ABB KEVCD sensor. The earthingswitch is not a compulsory switchgear acces-sory.


Low voltage compartment height is 705 mmunless a different one is mentioned. Anotherheight is 1100 mm. Height 580 mm is notavailable for double busbar system.

Total height of the unit including an exhaust ductmay vary depending on the type of the duct. Theheight in the table is one of the options.

Indicated number of cables is the maximumavailable. Voltage transformers occupy oneposition as well as surge arresters.

Rating of panels with vacuum contactor isalways 400 A.


Dimensions of panels may vary depending onproject requirements if there is any DTO (DesignTo Order) modification.

Incoming-outgoing unit (IF)

50

3.5.1 Feeder up to 3150 A

1) Height with low voltage compartment 1100 mm high is 2595 mm (12/17.5 kV)2) Height with low voltage compartment 1100 mm high is 2720 mm (24 kV)3) 31.5 kA for 12 kV; 25 kA for 17.5 kV

ABAB

ABAB

12-17.5 kV 24 kV

Width mm 650 800 1000 1400 800 1000

Height mm 2200 1) 2200 1) 2200 1) 2200 1) 2400 2) 2400 2)


Depth mm 2021 2021 2021 2071 2570 2570

Rated current A630 1250 1600 2000 2500 3150

Maximum short-time withstand current kA 31.5 3) 31.5 3) 31.5 3) 31.5 3) 25 25

Earthing switch


Number of CTs per phase (alternative combinations)1 medium size 1 long size

Number of VTs per phase (alternative combinations)1 fixed 2 fixed1 removable with fuses

3.5

51

3.5.2 Feeder over 2500 A

1) Height with low voltage compartment 1100 mm high is 2595 mm2) Height with low voltage compartment 1100 mm high is 2720 mm (24 kV)3) 31.5 kA for 12 kV; 25 kA for 17.5 kV

Incoming feeder for currents above 2500A always consists of two panels.One panel for each busbar system.

AB

ABAB

12-17.5 kV 24 kV

Width mm 1000 1000

Height mm 2200 1) 2200 2)


Depth mm 2021 2570

Rated current A2500 3150

Maximum short-time withstand current kA 31.5 3) 25

Earthing switch

Number of cable connections (maximum) No. 6 6


Number of VTs per phase (alternative combinations)1 fixed 2 fixed1 removable with fuses

Bus coupler

52

3.6.1 Longitudinal bus coupler - bus-tie part


12-17.5 kV 24 kV

Width mm 650 800 1000 800 1000

Height mm 2200 1) 2200 1) 2200 1) 2400 2) 2400 2)


Depth mm 2021 2021 2021 2570 2570

Rated current A6301250 1600 2000 2500

Maximum short-time withstand current kA 31.5 3) 31.5 3) 31.5 3) 25 25

Earthing switch




ABAB

Longitudinal bus coupler consists of 2 or 3 panels.Two bus-ties and a bus riser in betweenHere is described the bus-tie.

3.6

53

3.6.2 Longitudinal bus coupler - combined bus riser part


Longitudinal bus coupler consisting of 3 panels.Two bus-ties and a bus riser in betweenThe bus riser is described here.

ABAB

12-17.5 kV 24 kV

Width mm 650 800 1000 800 1000

Height mm 2200 1) 2200 1) 2200 1) 2400 2) 2400 2)


Depth mm 2021 2021 2021 2570 2570

Rated current A6301250 1600 2000 2500 3150

Maximum short-time withstand current kA 31.5 3) 31.5 3) 25

Earthing switch

Number of cable connections (maximum) No. 0 0 0



Bus coupler

54

3.6.3 Longitudinal bus coupler - bus riser part with a metering truck

12-17.5 kV 24 kV

Width mm 650 800 1000 800 1000

Height mm 2200 1) 2200 1) 2200 1) 2400 2) 2400 2)


Depth mm 2021 2021 2021 2570 2570

Rated current A6301250 1600 2000 2500

Maximum short-time withstand current kA 31.5 31.5 25

Earthing switch



Number of VTs per phase (alternative combinations)1 fixed2 fixed1 removable with fuses

Longitudinal bus coupler consisting of 2 panels.The bus riser is described here.

1) Height with low voltage compartment 1100 mm high is 2595 mm (12/17.5 kV)2) Height with low voltage compartment 1100 mm high is 2720 mm (24 kV)

ABAB

3.6

55

12-17.5 kV 24 kV

Width mm 650 800 1000 800 1000

Height mm 2200 1) 2200 1) 2200 1) 2400 2) 2400 2)


Depth mm 2021 2021 2021 2570 2570

Rated current A6301250 1600 2000 2500 3150

Maximum short-time withstand current kA 31.5 31.5 31.5 25 25

Earthing switch

Number of cable connections (maximum) 0 0 0 0 0



3.6.4 Transverse bus-tie

1) Height with low voltage compartment 1100 mm high is 2595 mm (12/17.5 kV)2) Height with low voltage compartment 1100 mm high is 2720 mm (24 kV)

AB

Measurement unit (M)

56

3.7

12-17.5 kV 24 kV

Width mm 650 800 1000 800

Height mm 2200 1) 2200 1) 2200 1) 2400 2)


Depth mm 2021 2021 2021 2570

Rated current A630 1250 1600 2000 2500 3150

Maximum short-time withstand current kA 31.5 31.5 31.5 25

Earthing switch

Number of cable connections (maximum) 0 0 0 0


Number of VTs per phase (alternative combinations)1 fixed2 fixed1 withdrawable with fuses 1 fixed and 1 withdrawable with fuses

Voltage transformers are located in the CB compartment.Transformers can be equipped with fuse status indication in 12 and 24 kV panels.1) Height with low voltage compartment 1100 mm high is 2595 mm (12/17.5 kV)2) Height with low voltage compartment 1100 mm high is 2720 mm (24 kV)

AB

AB

57

Busbar applications

3.8

3.8.1 Voltage transformers

3.8.2 Earthing switch

Transformers are installed in an additional box on the top of the switchgear.The box can be combined with LV Compartment 705 mm high.

Earthing switch is installed in an additional box on the the top of the switchgear. This feature is available up to 31.5 kA / 12 kV; 25 kA / 17.5 and 24 kV.The box can be combined with LV Compartment 705 mm high.

ABAB

ABAB

ABAB

ABAB

12-17.5 kV 24 kV

Width mm 650 800 1000 800 1000


25

31.5

12-17.5 kV 24 kV

Width mm 650 800 1000 800 1000

Without bushings

With bushings

59

Marine applications

4

Page Chap.

General notes 60 4.0

Incoming-Outgoing unit (IF) 61 4.1

Bottom cable entry standard version 61 4.1.1

Bottom cable entry deeper version 62 4.1.2

Top cable entry deeper version 63 4.1.3

Bus-tie unit (BT) 64 4.2

Bus Riser unit (R) 65 4.3

Measurement unit (M) 66 4.4

Riser unit with earthing transformer (RE) 67 4.5

Measurement unit with earthing transformer (ME) 68 4.6

Double incoming feeder unit (bottom or top cable entry) 69 4.7

Connection unit and incoming/outgoing feeder 70 4.8

Connection unit with meas. and incoming/outgoing feeder 71 4.9

Bus-tie and incoming/outgoing feeder 72 4.10

Bus riser unit with meas. and incoming/outgoing feeder 73 4.11

Motor control center - UniGear type ZVC 74 4.12

Bottom cable entry 74 4.12.1

Top cable entry 75 4.12.2

Circuit-breaker Approval 75 4.13

General characteristics 77 4.14

Degree of protection 77 4.14.1

Busbar partitioning 77 4.14.2

Compact duct with top chimneys 77 4.14.3

General notes

60

4.0

This chapter describes typical units dedicated tomarine applications.

The value of the rated current is referred to45 C. The value of the rated current at thistemperature value is indicated in brackets on thefollowing pages.

Each medium size current transformer can bereplaced by an ABB KEVCD sensor.

The earthing switch is not a compulsoryswitchgear accessory.


Low voltage compartment height is 705 mmunless a different one is mentioned. Otherheights are 580 mm and 1100 mm.

Total height of the unit includes low voltagecompartment (705 mm) and is without theexhaust duct.

Indicated number of cables is the maximumadmissible. Removable voltage transformersoccupies one position as well as surge arresters.

Rating of the panels with vacuum contactor isalways 400 A.


Dimensions of panels may vary depending onproject requirements.

61

Incoming-Outgoing unit (IF)

4.1

4.1.1 Bottom cable entry standard version

*) The rated current value referred to 45 C is indicated in brackets1) Up to 50 kA with V-Contact2) 31.5 kA3) 40 kA

12 kV

Width mm 650 800 1000

Height mm 2200 2200 2200

Height with gas exhaust duct mm 2530 2530 2530

Depth mm 1340 1340 1340/1390

Rated current A630 (630) *) 1)1250 (1200) 2) 3)1600 (1530) 2000 (1910) 2500 (2390) 3150 (3010)

Earthing switch


Number of CTs per phase (alternative combinations) 1 medium size 1 long size2 medium size1 medium and 1 long size1 homopolar toroidal CT (no. 1 for the three phases)

Number of VTs per phase (alternative combinations)1 fixed 2 fixed

W = 650 mm

Incoming-Outgoing unit (IF)

62

4.1.2 Bottom cable entry deeper version


12 kV

Width mm 650 800 1000

Height mm 2200 2200 2200


Depth mm 1840 1840 1840 1890

Rated current A630 (630) *) 1)1250 (1200) 2) 3)1600 (1530) 2000 (1910) 2500 (2390) 3150 (3010)

Earthing switch

Number of cable connections (maximum) No. 3/6 6 6 6

Number of CTs per phase (alternative combinations)1 medium size 1 long size 2 medium size 1 medium and 1 long size 1 homopolar toroidal CT (no. 1 for the three phases)


W = 650 mm

63

4.1


4.1.3 Top cable entry deeper version

12 kV

Width mm 650 800 1000

Height mm 2200 2200 2200


Depth mm 1840 1840 1840 1890

Rated current A630 (630) *) 1)1250 (1200) 2) 3)1600 (1530) 2000 (1910) 2500 (2390) 3150 (3010)

Earthing switch


Number of CTs per phase (alternative combinations)1 medium size 1 long size 2 medium size 1 medium and 1 long size 1 homopolar toroidal CT (no. 1 for the three phases)


W = 650 mm

Bus-tie unit (BT)

64

4.2

*) The rated current value referred to 45 C is indicated in brackets1) 31.5 kA2) 40 kA

12 kV

Width mm 650 800 1000

Height mm 2200 2200 2200


Depth mm 1340 1340 1340/1390

Rated current A630 (630) *)1250 (1200) 1) 2)1600 (1530) 2000 (1910) 2500 (2390) 3150 (3010)

Earthing switch

Number of cable connections (maximum) No.

Number of CTs per phase (alternative combinations) 1 medium size 1 long size2 medium size1 medium and 1 long size1 homopolar toroidal CT (no. 1 for the three phases)

Number of VTs per phase (alternative combinations)1 fixed2 fixed

65

Bus Riser unit (R)

4.3


12 kV

Width mm 650 800

Height mm 2200 2200


Depth mm 1340 1340/1390

Rated current A630 (630) *)1250 (1200) 1) 2)1600 (1530) 2000 (1910) 2500 (2390) 1) 2)3150 (3010)

Earthing switch


Number of CTs per phase (alternative combinations)1 medium size1 long size2 medium size1 medium and 1 long size1 homopolar toroidal CT (no. 1 for the three phases)


Measurement unit (M)

66

4.4

12 kV

Width mm 650 800

Height mm 2200 2200


Depth mm 1340 1340

Rated current A630 (630) *) 1) 2)1250 (1200)1600 (1530)2000 (1910)2500 (2390)3150 (3010)

Earthing switch





67

Riser unit with earthing transformer (RE)

4.5

12 kV

Width mm 650 800

Height mm 2200 2200


Depth mm 1340 1340/1390

Rated current A630 (630) *)1250 (1200) 1) 2)1600 (1530)2000 (1910)2500 (2390) 1) 2)3150 (3010)

Earthing switch





Measurement unit with earthing transformer (ME)

68

4.6

12 kV

Width mm 650 800

Height mm 2200 2200


Depth mm 1340 1340

Rated current A630 (630) *) 1) 2)1250 (1200)1600 (1530)2000 (1910)2500 (2390)3150 (3010)

Earthing switch


Number of CTs per phase (alternative combinations)1 medium size1 long size2 medium size1 medium and 1 long size1 homopolar toroidal CT (no.1 for the three phases)



69

Double incoming feeder unit (bottom or top cable entry)

4.71s

t (g

roun

d) l

evel

2nd

(up

per

) lev

el

*) The rated current value referred to 45 C is indicated in brackets1) The height of the switchgear in the compound configuration with simple and double level is the same as that of the double level unit

12 kV

Width mm 750 900

Height mm 2698 2698

Height with gas exhaust duct mm 2698 1) 2698 1)

Depth mm 1976 1976

Rated current A630 (630) *) 1000 (960) 1250 (1200) 1600 (1530)


Number of cable connections 1st level No. 3 3for each phase (maximum) 2nd level 3 3

Number of CTs per phase (alternative combinations) - 1st level1 medium size 1 long size 2 medium size1 medium and 1 long size1 homopolar toroidal CT (no.1 for the three phases)

Number of CTs per phase (alternative combinations) - 2nd level1 medium size 1 long size 2 medium size1 medium and 1 long size1 homopolar toroidal CT (no.1 for the three phases)

Number of VTs per phase (alternative combinations) - 1st level1 fixed

Number of VTs per phase (alternative combinations) - 2nd level1 fixed

Connection unit and incoming/outgoing feeder

70

4.8

*) The rated current value referred to 45 C is indicated in brackets1) The height of the switchgear in the compound configuration with simple and double level is the same as that of the double level unit2) Not applicable for second level

1st

(gro

und

) lev

el2n

d (u

pp

er) l

evel

12 kV

Width mm 750 900

Height mm 2698 2698


Depth mm 1976 1976

Rated current A630 (630) *) 2)1250 (1200) 1600 (1530)


Number of cable connections 1st level No. 3 3for each phase (maximum) 2nd level

Number of CTs per phase (alternative combinations) - 1st level1 medium size 1 long size 2 medium size1 medium and 1 long size1 homopolar toroidal CT (no. 1 for the three phases)

Number of CTs per phase (alternative combinations) - 2nd level1 medium size1 long size2 medium size1 medium and 1 long size1 homopolar toroidal CT (no. 1 for the three phases)



71

Connection unit with measurements and incoming/outgoing feeder

4.9


1st

(gro

und

) lev

el2n

d (u

pp

er) l

evel

12 kV

Width mm 750 900

Height mm 2698 2698


Depth mm 1976 1976

Rated current A630 (630) *) 2)1250 (1200) 1600 (1530)



Number of CTs per phase (alternative combinations) - 1st level1 medium size 1 long size 2 medium size1 medium and 1 long size1 homopolar toroidal CT (no. 1 for the three phases)

Number of CTs per phase (alternative combinations) - 2nd level1 medium size1 long size2 medium size1 medium and 1 long size1 homopolar toroidal CT (no. 1 for the three phases)



Bus-tie and incoming/outgoing feeder

72

4.10


1st

(gro

und

) lev

el2n

d (u

pp

er) l

evel

12 kV

Width mm 750 900

Height mm 2698 2698


Depth mm 1976 1976

Rated current A630 (630) *) 2)1000 (960) 1250 (1200) 1600 (1530)




Number of CTs per phase (alternative combinations) - 2nd level1 medium size 1 long size 2 medium size 1 medium and 1 long size 1 homopolar toroidal CT (no.1 for the three phases)



73

Bus riser unit with measurements and incoming/outgoing feeder

4.11

*) The rated current value referred to 45 C is indicated in brackets1) The height of the switchgear in the compound configuration with simple and double level is the same as that of the double level unit.2) Not applicable for second level.

1st

(gro

und

) lev

el2n

d (u

pp

er) l

evel

12 kV

Width mm 750 900

Height mm 2698 2698


Depth mm 1976 1976

Rated current A630 (630) *) 2)1000 (960) 1250 (1200) 1600 (1530)




Number of CTs per phase (alternative combinations) - 2nd level1 medium size1 long size2 medium size1 medium and 1 long size1 homopolar toroidal CT (no.1 for the three phases)



Motor control center - UniGear type ZVC

74

4.12.1 Bottom cable entry

UniGear Type ZVC can be combined with Unigear Type ZS1, single busbar system.

7.2 kV

Width mm 325

Height mm 2200

Height with gas exaust duct mm 2530

Depth mm 1304

Rated current A400

Earthing switch

Number of cable connections (maximum) No. 1

Number of CTs per phase1 medium size

Number of VTs per phase (alternative combinations)1 fixed2 fixed1 removable with fuses1 withdrawable with fuses

75

4.12

4.12.2 Top cable entry

7.2 kV

Width mm 325

Height mm 2200

Height with gas exhaust duct mm 2530

Depth mm 1504

Rated current A400

Earthing switch

Number of cable connections (maximum) No. 1

Number of CTs per phase1 medium size

Number of VTs per phase (alternative combinations)1 fixed2 fixed1 removable with fuses1 withdrawable with fuses

Circuit-breaker Approval

76

4.13

Summary table relative to approval of the Shipping Registers.

RINA and BV (Bureau Veritas) approval it is not required by themarket.

LR: Lloyds RegisterDNV: Det Norske VeritasGL: Germanisher Lloyd

Circuit-breaker / Contactor Shipping Registerstype LR DNV GL

HD4/P 12.06.32 12.12.32 12.16.32 12.20.32 12.25.32 12.32.32 12.12.40 12.16.50 12.25.50 12.20.50 12.32.50

VD4/P 12.06.32 12.12.32 12.16.32 12.20.32 12.25.32

V Contact V7 P V12 P

77

General characteristics

4.14

4.14.1 Degree of protection

The standard external degree of protection of themarine switchgear is IP42 or IP43.

IP42: protection against foreign bodies withdiameter 1mm and against water at 15;

IP43: protection against foreign bodies withdiameter 1mm and against water at 60.

4.14.3 Compact duct with top chimneys

The duct is fixed on the top of the auxiliarycompartment.In marine plants, the exhaust gas cannot generallybe evacuated out of the room and therefore thegas duct will always be closed on both end sidesand equipped with top chimneys or an absorber.If it is possible in some cases to evacuate hot gasout of the room, the standard gas duct can besupplied.

4.14.2 Busbar partitioning

On marine plants the units (busbars) need amechanical support for fault current due to thehigh level of vibrations; so bushings are put oneach unit.

Unit Width Ith Bushings

mm kA

650, 750, 800, 900, 1000 all Each unit

1

2

3

Gas exhaust duct

Flaps

Top chimneys

1

2

3

79

5General characteristics

Page Chap.

IEC reference Standards 80 5.1

Operating conditions 81 5.2

Level of insulation 82 5.3

Reference Standards 82 5.3.1

Rated degrees of insulation 82 5.3.2

Example of calculation 83 5.3.3

Degrees of protection 84 5.4


Identification table 84 5.4.2

Degrees of protection 84 5.4.3

Internal arc withstanding 85 5.5


Switchgear characteristics 85 5.5.2

Switchgear classification 85 5.5.3

Overlapping period of IEC 60298 85 5.5.4

Installation of UniGear with gas ducts 86 5.6

Introduction 86 5.6.1

Standard arrangement 89 5.6.2

Alternative solutions 92 5.6.3

Alternative solutions for ZS1 extensions 95 5.6.4

Measurements in the switchgear room 108 5.6.5

Internal Arc Classified - General considerations 110 5.6.6

Busbar partitioning 111 5.7

IEC reference Standards

80

5.1

Switchgear 62271-200

Switchgear and apparatus 60694

IEC 60271-200 Standard references of the tests the switchgear has been subjected to: dielectric 6.1 temperature 6.2 impedance measurement 6.4 rated short-time withstand current of the main circuits 6.5.101 rated short-time withstand current of the earthing circuits 6.5.102 removable mechanical parts 6.102.1 mechanical interlocks 6.102.2 degree of protection 6.103 internal arc 6.108

Circuit-breakers 62271-100

Contactors 60470

Fuses 60282-1

Switch-disconnectors 60265-1 and 60420

SF6 gas 60376

Earthing switch 60129

Level of insulation (Co-ordination guide) 60071

Level of insulation (Values) 60694 Table 1a

Internal arc 62271-200Annex A,criteria 1 to 5

Degrees of protection 60529

Current transformers 60044-1

Voltage transformers 60044-2

Current sensors 60044-8

Voltage sensors 60044-7

81

Operating conditions

5.2

The switchgear rated characteristics are guaran-teed under the following ambient conditions: minimum ambient temperature - 5 C maximum ambient temperature + 40 C maximum relative humidity 95 % maximum altitude 1000 m above sea level. presence of normal, non-corrosive and

unpolluted atmosphere.

The switchgear must also be installed in ambientswith the following characteristics: inside masonry or prefabricated structures; suitable for containing electrical apparatus; closed and not accessible to the public; only utilisable by personnel in charge of the

electrical installation.

Level of insulation

82

5.3.1 Reference Standards

IEC 60694.

The rated values are guaranteed at sea level andunder normal atmospheric conditions (IEC 60071-2,pressure 1013 h Pa, temperature 20 C, relativehumidity 11 g/m3).The degree of air insulation decreases progres-sively as the altitude increases. In any case, therated values are guaranteed up to 1000 metresabove sea level.

Voltage test at industrial frequency(installation altitude)

Impulse withstand voltage(installation altitude)

Test voltage at industrial frequency(according to IEC 60694) x Ka

Impulse withstand voltage(according to IEC 60694) x Ka

5.3.2 Rated degrees of insulation

Rated andTest voltage at industrial frequency Impulse withstand voltage

insulation voltage For the For the phase-phase For the For the phase-phaseinsulation distance and phase-earth distance insulation distance and phase-earth distance

kV kV kV kV kV

3.6 12 10 46 40

7.2 23 20 70 60

12 32 28 85 75

17.5 45 38 110 95

24 60 50 145 125

36 80 70 190 170

Above an altitude of 1000 m, a correction factormust be introduced which allows the requiredinsulation levels to be guaranteed.

The graph below shows the correction factorsaccording to the altitude.

Ka = correction factor1.50

1.40

1.30

1.20

1.10

1.001000 1500 2000 2500 3000 3500 4000

H= altitude (m)

Ka = em (H-1000)/8150

(IEC 60071-2)

M = 1

5.3

83

5.3.3 Example of calculation

The levels of insulation required are thereforeguaranteed by the 17.5 kV (38 kV and 95 kV)switchgear.

Rated insulation voltage of the switchgear kV 12

Test voltage at industrial frequency kV 28

Impulse withstand voltage kV 75

Altitude of the switchgear installation site metres 2000

Correction factor Ka 1.13

Test voltage at industrial frequency (altitude of installation) 28x1.13

Impulse withstand voltage (altitude of installation) 75x1.13

Test voltage at industrial frequency kV 31.6

Impulse withstand voltage kV 84.7

Degrees of protection

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5.4


IEC 60529.

5.4.3 Degrees of protection

UniGear switchgear is usually supplied with thefollowing standard degrees of protection:

External housing IP40 Between the compartments IP20

5.4.2 Identification table

IP Protection against foreign bodies Protection against water

0 No protection No protection

1 Foreign bodies with diameter 50 mm or more Vertical rain

2 Foreign bodies with diameter 12 mm or more Rain at 15

3 Foreign bodies with diameter 2.5 mm or more Rain at 60

4 Foreign bodies with diameter 1 mm or more Spray from all directions

5 Deposit of dust Jets from all directions

6 Entry of dust Flood

7 Immersion of limited duration

8 Immersion of indefinite duration

On request, the external housing can be suppliedwith other degrees of protection up to IP53maximum.In case of a degree higher than IP41, pleasecontact the manufacturer.

85

Internal arc withstanding

5.5


IEC 62271-200 Annex A.

Meaning of the criteria of the IEC 62271-200Standard for carrying out the internal arc withstandtests:

5.5.2 Switchgear characteristics

The UniGear switchboard satisfies all the criteriafrom 1 to 5 for guaranteeing safety of the person-nel in charge of the installation in the case of aninternal arc.The criteria apply to the external switchgearhousing.

5.5.3 Switchgear classification

UniGear is classified as IAC accessibility type Bacc. to IEC 62271-200

5.5.4 Overlapping period of IEC 60298

There is an overlapping period within the EuropeanUnion. IEC 60298 is valid until 31st Dec. 2007

Criteria Description

1 The switchgear doors must remain closed and there must be no opening of the coveringsheets

2 No part of the switchgear which is a possible source of danger for personnel must becomedetached

3 No drilling holes on the external housing of the switchgear must be made in the parts accessi-ble to personnel

4 The vertical and horizontal fabric indicators on the outside of the switchgear must not catch fire

5 All the switchgear earthing connections must remain efficient

Installation of UniGear with gas ducts

86

5.6.1 Introduction

The event of internal arc inside medium voltageswitchgear occurs very rarely and generatesoverpressures inside the compartment affected bythe arc, thereby causing exhaust of hot gases andmaterial particles.This exhaust must be carefully checked in order toguarantee safety of people and avoid damage tothe objects in the vicinity of the switchgearaffected by the breakdown.

UniGear can be equipped with a metal sheet ductfor collecting and exhausting the hot gases.This duct is mounted on the upper side of theswitchgear and is normally extended on both theright and left extremities (see Figure 5/1).

Figure 5/1

5.6

87

The minimum height of the switchgear room is3 metres and the degree of protection obtainableis up to IP53.

This solution is capable of guaranteeing safety ofpeople standing in front of the switchgear, accord-ing to Annex A of the IEC 62271-200 Standard(criteria 1 to 5).

If the extremities of the gas duct aredirected towards areas of the installa-tion building that are accessible topersonnel and/or dedicated to installa-tion of other equipment, machines andplants, these extremities must beextended in order to permit the exhaustof the hot gases in zones that are notdangerous for people and machinery.

The extensions must be realised usingmetal sheet gas ducts with a crosssection at least equal to the extendedsections already applied to theswitchgear. The extensions must becapable of withstanding a minimumpressure value of 80kPa and must beproperly supported. The presence ofbends and curves in the ducts must beaccepted only where strictly necessary:in this case, the bend must be realisedwith the maximum applicable bendingradius.

The solution recommended in order to avoidexhausting of gases and overpressures inside theswitchgear installation room is to extend theexhaust duct outside the substation (from left andright sides or front and rear sides). In this case,pay attention to accessibility of people to the gas-exhausting zone and protect the gas exhaustchannel extremity in order to avoid entry of water,dust, small animals and any foreign bodies.

Figures 5/1 and 5/2 show two examples of realgas ducts applications.


88

The height B of the panel equipped with thestandard gas duct arrangement (Figures 5/1 and5/2) is 2675 mm (12/17.5 kV version) or 2775 mm(24 kV version). The switchgear height A is 2200mm (12/17.5 kV version) or 2325 mm (24 kVversion) if equipped with the 705 mm LV compart-ment.

Figure 5/2 Rear exhaust arrangement

The figures contained in Section 5.6.2 show thestandard arrangement (front and side view).If the dimensions and position of the switchgearroom do not allow installation of the switchgearaccording to the solutions presented above, it ispossible to arrange gas exhausting according tothe rules indicated in Section 5.6.3.

Test certification is not available for allthe described solutions. Please contactABB for further information.

5.6

89

5.6.2 Standard arrangement

Evacuation from the room of the exhausted gasproduced by the internal arc fault must normallybe carried out. The following solutions can beused when it is possible to exhaust the gasesoutside the switchgear room:

Standard duct

Compact duct


90

5.6.2.1 Standard duct

Top-mounted VTs (up to 50 kA) andbusbar earthing switch (up to 31.5 kA)can be applied to this duct type.The units equipped with these applica-tions must be fitted with a dedicatedduct type (see the relevant configura-tion document).

Figure 5/3 Standard duct

Internal arc current [kA] 20 25 31.5 40 502.1

Fault duration time [s] 0.5 1 0.5 1 0.5 1 0.5 1 0.5

B 4 m Yes Yes Yes Yes Yes Yes Yes Yes Yes

3.5 m B < 4 m Yes Yes Yes Yes Yes Yes Yes Yes Yes

3 m B < 3.5 m Yes Yes Yes Yes Yes Yes Yes Yes Yes

2.8 m B < 3 m No No No No No No No No No

2.5 m B < 2.8 m No No No No No No No No NoCei

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Rated voltage [kV] 12/17.5 24

Switchgear height A [mm] 2675 2775(705 and 1100 mm height LV compartment)

Max protection degree IP43

Ceiling type Concrete or false

Fault limiting devices Optional

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5.6.2.2 Compact duct

Top-mounted VTs and busbarearthing switch cannot be appliedto this duct type.

Figure 5/4 Compact duct



B 4 m Yes Yes Yes Yes Yes Yes (*) (*) (*)

3.5 m B < 4 m Yes Yes Yes Yes Yes Yes (*) (*) (*)

3 m B < 3.5 m Yes Yes Yes Yes Yes Yes (*) (*) (*)



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Switchgear height A [mm] 2500 2570(705 mm height LV compartment)



Fault limiting devices Mandatory for values marked with (*)

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5.6.3 Alternative solutions

The following solutions can be used when it is notpossible to exhaust the gases outside theswitchgear room:

Compact duct with top chimneys

Application of partitions up to the ceiling

Without extra measures

5.6

93

5.6.3.1 Compact duct with top chimneys

Figure 5/5 Compact duct with top chimneys

Top-mounted VTs and busbar earthingswitch cannot be applied to this ducttype. The recommended solution is tomount at least one chimney every twopanels.



B 4 m Yes Yes Yes Yes Yes (*) (*) (*) (*)

3.5 m B < 4 m Yes Yes Yes Yes Yes (*) (*) (*) (*)

3 m B < 3.5 m Yes Yes Yes Yes Yes (*) (*) (*) (*)



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5.6.3.3 Without extra measures

Figure 5/7 Without extra measures

Top-mounted VTs and busbar earthingswitch can be applied to theswitchgear.



B 4 m Yes (*) Yes (*) (*) (*) No No No

3.5 m B < 4 m Yes (*) Yes (*) No No No No No

3 m B < 3.5 m Yes (*) No No No No No No No



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Switchgear height A [mm] 2200-2595 2325-2720(705 and 1100 mm height LV compartment)

Max protection degree IP4X

Ceiling type Concrete


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5.6.4 Alternative solutions for ZS1extensions

The following solutions can be used when it is notpossible to exhaust the gases outside theswitchgear room and should preferably only beused for ZS1 extensions:

Duct with top absorbers

Diverted duct


96

5.6.4.1 Duct with top absorbers

Figure 5/8 Duct with top absorbers

Top-mounted VTs and busbar earthingswitch cannot be applied with this ducttype. The recommended solution is tomount at least one absorber every twopanels.



B 4 m Yes Yes Yes Yes (*) (*) No No No

3.5 m B < 4 m Yes Yes Yes Yes (*) (*) No No No

3 m B < 3.5 m No No No No No No No No No



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Max protection degree IP4X

Ceiling type Concrete


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5.6.4.2 Diverted duct

Figure 5/9 Diverted duct

Top-mounted VTs and busbar earthingswitch cannot be applied to this ducttype. The application must be usedwith at least 5 panels.



B 4 m Yes Yes Yes Yes Yes Yes (*) (*) (*)


3 m B < 3.5 m No No No No No No No No No



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5.6.4.3 UniGear type ZS1 - Double Level

Evacuation from the room of the exausted gasproduced by the internal arc fault must be nor-mally carried out. The following first solutions canbe used when it is possible to exaust the gasesoutside the switchgear room, the second onewhen it is not possible:

Standard duct

Standard duct with top chimneys

Single level connected with double level withstandard duct

Single level connected with double level withstandard duct with top chimneys

For double level panels the fault limitingdevices available are Fast Recovery,TVOC or REA. Ith Limiter is not avail-able.

5.6

99

5.6.4.3.1 Standard duct


Internal arc current [kA] 20 25 31.5 40 504.3.1







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Rated voltage [kV] 12/17.5

Switchgear height A [mm] 2700



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5.6.4.3.2 Standard duct with top chimneys

Figure 5/11 Standard duct with top chimneys








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Fault limiting devices Mandatory for values marked with (*)Ad

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101

5.6.4.3.3 Single level connected with double levelwith standard duct









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5.6.4.3.4 Single level connected with double levelwith standard duct with top chimneys

Figure 5/13 Standard duct with top chimneys








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Fault limiting devices Mandatory for values marked with (*)Ad

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103

5.6.4.4 UniGear type ZS1 - Double Busbar System

Evacuation from the room of the exausted gasproduced by the internal arc fault must be nor-mally carried out. The following first solutions canbe used when it is possible to exaust the gasesoutside the switchgear room, the second onewhen it is not possible:

Standard duct

Standard duct with top chimneys

Compact duct

Compact duct with top chimneys


104

5.6.4.4.1 Standard duct


Internal arc current [kA] 20 25 31.54.4.1

Fault duration time [s] 0.5 1 0.5 1 0.5 1

B 4 m Yes Yes Yes Yes Yes Yes

3.5 m B < 4 m Yes Yes Yes Yes Yes Yes

3 m B < 3.5 m (see below note) Yes Yes Yes Yes Yes Yes

2.8 m B < 3 m No No No No No No

2.5 m B < 2.8 m No No No No No NoCei

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Switchgear height

Documents

Guide_UniGear_EN-1VLM000005 Rev.8-2008.01.31.pdf