GE Industrial Solutions Entellisys Low Voltage Switchgear - Manuel (Page 14)

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Fuses for the charge, close, and trip circuits of electrically operated
EntelliGuard E circuit breakers are mounted in the middle right the
breaker compartment, behind the door. Fuses for the SET and RESET
coils of the optional Network Interlock breaker accessory are also
mounted in the right center of the compartment for EntelliGuard E
breakers.
Primary disconnect shutters are available as options to provide
protection against contact with the energized stationary primary
disconnects when the breaker is removed from its compartment.
Shutters are supplied as standard components in the source (main,
generator) and tie breaker compartments of multi-source lineups.
The shutters are constructed from glass-reinforced polyester
insulating material. Shutters are optionally available in all breaker
cubicles.
The shutters prevent frontal access to the primary disconnect line
and load power stabs.
The shutters are closed when the breaker is in the DISCONNECTED
Position. As the circuit breaker is racked from the DISCONNECTED
Position to the TEST Position the shutters remain fully closed. As the
breaker is racked from the TEST Position to the CONNECTED Position,
the shutters open allowing the breaker to connect to the primary
disconnects.
As the circuit breaker is racked from the DISCONNECTED Position to
the TEST Position, the rear of the circuit breaker frame releases the
shutter operating lever (6) allowing the shutters to fully close. The
operating lever remains in contact with the circuit breaker frame
during operation. As the breaker is racked from the TEST Position to
the CONNECTED Position, the shutters remain fully closed. Circuit
breakers are supported on drawout rails.
1. Secondary Disconnect 5. Accessories Fuses
2. Carriage Position Switch 6. Shutter operating lever
3. Shutter 7. Drawout rails
4. Cassette
Fig. 3-6. Circuit breaker compartment (30-inch wide) with shutters