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ALBS-A12~24

The ALBS is a 12~24 kV air-pnuematic load-break switch with a nominal current rating of 630A. It is a compactly designed system which is compatible with both LCA-A panels and IV2000 panels. The arc-quenching system of the ALBS consists of a pneumatic piston within the moving contacts which discharges a shot of air at the arcing plasma during the opening action, giving it a breaking capacity of 1500A at 12kV. The ALBS is available as a line switch or a fuse-switch with fuse-holders for HRC fuses of up to 100A, and an operating mechanism with tripping capability. Motorised operation is available for the ALBS.

albs The ALBS-A18
The left illustration is that of the 17.5kV ALBS line switch with earthing switch. The centre illustration is that of a 12/17.5 kV ALBS Fuse-switch with fuse-clamps at the side of the switch assembly.This version is available up to 17.5kV only. The illutration on the extreme right represents a second version of the ALBS fuse-switch whereby the fuse is mounted at the base of the switch. This version is available up to 24kV.

ALBSLine ALBSwFuse ALBSwFusebase

Technical parameters of the LK-ALBS load break switches

Item

Unit

ALBS-12

ALBS-A18

ALBS-A24

Rated Voltage

kV

12

17.5

24
Maximum service voltage

kV

12

17.5

24
Withstand voltage to earth and between poles

kV

28

38

50
Withstand voltage across the isolating distance

kV

32

45

60
Impulse withstand voltage to earth and between poles

kV

75

95

125
Impulse withstand across the isolating distance

kV

85

110

145
Rated current

A

630

630

630
Breaking capacity for active circuits and for ring-circuits

A

630

630

630
Breaking capacity for no-load transformers

A

16

16

16
Partial discharge

PC

<5

<5

<5
Breaking capacity for no-load line and cables

A

25

25

25
Short-time current *

kA

20/2s

20/2s

20/1s
Making capacity

kA

50

50

50
Max. breaking capacity (transfer current) **

A

1500

1300

1100
Prospective breaking capacity (of fuses)

kA

31.5

31.5

31.5
Mechanical endurance times

4000

4000

4000
Electrical endurance times

500

500

500
Mechanical response time *** ms

50

50

50

(*) - LK-ALBS-AL or BL type for line-switch application.

(**) - LK-ALBS-BF for fuse-switch application.

(***) - The mechanical response time of the ALBS refers to the time passed between triggering of the tripping mechanism until the opening of the main contacts.