ABB VM1 - Page 25

Instruction manual 504/05 | VM1 Vacuum circuit-breaker 25
Figure 9/12: Sectional view of a vacuum circuit-breaker type VM1,
schematic diagram.
1 Mechanism enclosure
1.1 Front plate, removable
9 Emergency manual opening mechanism
10 Magnetic actuator
11 OFF coil
12 Magnet armature
13 Permanent magnets
14 ON coil
15 Sensor -B0A for ”circuit-breaker OFF” signal
16 Sensor -B0E for ”circuit-breaker ON” signal
17 Travel adjuster
18 Lever shaft
19 Insulated link rod
20 Contact force spring
21 Flexible connector
22 Lower breaker terminal
23 Cast insulation
24 Vacuum interrupter
24.1 Moving contact
24.2 Fixed contact
25 Upper breaker terminal
22
21
20
19
17
16
14
12
11
9
1
25
24
23
13
1.1
10
15
18
24.1
24.2
Figure 9/13: Position indicator.
6 Mechanical position indicator
15 Sensor -B0A for ”circuit-breaker OFF” signal
16 Sensor -B0E for ”circuit-breaker ON” signal
6
15
16
BA 504-05 GB_29102012.indd 25 30.10.12 13:45