ABB VBF Series - Page 37

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Lb
Half Shaft
P1
Mechanism
Lever
Cam
Assembly
Latch
La
Tripping
Spring
SPRING CHARGING
DEVICE
CLOSING LEVER
CLOSING COMMAND
Lb
La
Mechanism Lever
P1
Cam
Assembly
CLOSING INTERLOCK
Latch
TRIPPING
SPRING
La
Lb
Lever
Half Shaft
Closing lever
Charging Shaft
P1
Power Shaft
Tripping
Cam
Assembly
Tripping Lever
CLOSING
COMMAND
Mechanism
Lever
Latch
TRIPPING
SPRING
Fig. G Circuit-Breaker Closed, tripping spring charged
Fig. E Mechanism in open condition & both the springs in discharged condition
Fig. F Mechanism in open condition & Closing Springs is charged,
PART C Operating Mechanism working principle & maintenance