ABB VBF Series Instruction For Installation, Service And Maintenance page 37

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