ABB VM1 - Page 24

24 VM1 Vacuum circuit-breaker | Instruction manual 504/05
Figure 9/9: Vacuum circuit-breaker, type VM1, on withdrawable part,
12 kV, 630 A, ≤ 31.5 kA, pole side (use in ZS8.4 only).
33 Breaker pole
34 Contact arm with insulating tube
(versions for rated currents to 1250 A and above have
shrink sleeves)
34.1 Contact system
Figure 9/10: Withdrawable part with built-in auxiliary switch.
-BT2 Test position indicator
-BT1 Service position indicator
35.1 Spindle mechanism
35.2 Square spigot
35.5 Pawl
35.6 Scene head on spindle
37 Control wiring plug connector for withdrawable
assembly
Figure 9/11: Circuit-breaker front with controls and annunciations.
1 Mechanism enclosure
1.1 Front plate
1.2 Bore for handling, both sides
2 ”READY” lamp
3 ON push-button
4 OFF push-button
5 Mechanical operating cycle counter
6 Mechanical position indicator
7 Rating plate
8 Socket for emergency manual operation lever
7
6
5
1
1.2
1.1
2
3
4
8
33
34
34.1
-BT2-BT1
37
35.2 35.635.5 35.1
BA 504-05 GB_29102012.indd 24 30.10.12 13:44