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DEH-41473
Primary Disconnect Shutter
DANGER: Electrical arc flash hazard. Personal
protection equipment required. Turn off power to the
equipment before working inside.
Primary disconnect shutters (Figure 3.15) are available as a
standard to provide protection against contact with the
energized stationary primary disconnects when the breaker is
removed from its compartment. Shutters are supplied as
standard component on all breaker compartments and future
breaker compartments. The shutters are constructed from
glass-reinforced polyester insulating material.
The shutters (movable barriers) prevent frontal access to the
primary disconnect line and load stationary disconnects.
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.
Figure 3.16 shows the shutter assembly with the shutter in
the open position.
©2016 General Electric. All rights reserved.
Courtesy of NationalSwitchgear.com
AKD-20 AR / Entellisys AR Low-voltage Switchgear
Section 3. Switchgear Description
Figure 3.15 Primary disconnect shutter (closed)
Secondary Disconnect (Optional)
(1)
Shutter Assembly (Closed)
(2)
Cassette Side Barrier
(3)
Racking Shaft
(4)
Draw-out Rails
(5)
Figure 3.16 Primary disconnect shutter (opened)
Shutter Assembly (Opened)
(1)
Primary Disconnect Stab Tip (Typical)
(2)
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