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1
Manual spring-charging access port
2
Manual close button
3
Charged/discharged indicator
4
Open/closed indicator
5
Operations counter
6
Manual open/trip button
Figure 1: Type GMSG vacuum circuit breaker front panel controls
8
1
2
6
3
4
5
Storage procedure
1. Whenever possible, install the circuit
breaker in its assigned switchgear
enclosure for storage. Follow instructions
contained in the switchgear instruction
manual, E50001-F710-A230-X-XXXX for
type GM-SG non-arc-resistant or E50001-
F710-A254-X-XXXX for type GM-SG-AR
arc-resistant switchgear.
2. When the circuit breaker needs to be
placed on its pallet for storage, be sure
the unit is securely bolted to the pallet
and covered with polyethylene film at
least 10 mils thick.
Indoor storage
Whenever possible, store the circuit breaker
indoors. The storage environment must be
clean, dry and free of such items as construction
dust, corrosive atmosphere, mechanical
abuse and rapid temperature variations.
Outdoor storage
Outdoor storage is not recommended. When
no other option is available, the circuit
breaker must be completely covered and
protected from rain, snow, dirt and all other
contaminants.
Space heating
Space heating must be used for both indoor
and outdoor storage to prevent condensation
and corrosion. When the circuit breaker is
stored outdoors, 250 watts per circuit breaker
of space heating is recommended. If the
circuit breaker is stored inside the switchgear
enclosure, and the switchgear is equipped
with space heaters, energize the space
heaters.
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