Siemens GMSG

Vacuum interrupter/operator
Figure 8: Front view of type GMSG vacuum circuit breaker with front panel removed
CHARGED/
DISCHARGED
indicator
OPEN/CLOSED
indicator
Operations counter
Capacitor trip
(optional)
Jack shaft
Closed circuit breaker interlock
Spring-
charging
motor
Trip-free
interlock
Ground disconnect
Auxiliary
switch
Close coil
Trip coil
Push-to-trip
Mechanism-
operated cell
(MOC) switch
operator
Secondary
disconnect
Push-to-closeClosing
spring
Opening
spring
Gearbox
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