Table of Contents
Advertisement
DEH-41473
Circuit Breaker Compartments
DANGER: Electrical arc flash hazard. Personal
protection equipment required. Turn off power to the
equipment before working inside.
Closed door draw-out circuit breaker compartments are
standard construction with all switchgear equipment (Figure
3.12). The circuit breaker compartment doors remain closed
and latched while the breaker is racked out from the
CONNECTED position, through TEST, to the DISCONNECTED
position.
Breaker compartment doors do not have any ventilation slots,
thus protecting operators from hot ionized gases which may
be vented by the breaker during circuit interruption.
Additionally, the breaker compartment is enclosed by
grounded steel barriers on the top, sides, bottom, and front
(Figure 3.13 and Figure 3.14). In the back, a flame-retardant,
track resistant, glass-filled polyester base minimizes the
possibility of fault communication between compartments or
to the bus.
A circuit breaker racking handle is provided in the right most
pocket of the breaker compartment fascia (Figure 3.11).
Up to two key interlocks may be provided in the breaker
compartment fascia (Figure 3.12). If the application does not
require a key interlock(s), metallic key interlock plug(s), GE
#GM2KIP, are provided.
WARNING: The EntelliGuard racking handle must be
returned to its compartment to maintain the integrity of the
arc resistant enclosure.
WARNING: Either the key interlock(s) or the metallic key
interlock plug must be installed to maintain the integrity of
the arc resistant enclosure.
An optional position switch may be provided in the left side
frame of the circuit breaker compartment (Figure 3.14). If the
application does not require a position switch, a metallic
position switch cover, GE #GM2PSC, is provided.
WARNING: Either the position switch or the metallic
position switch cover must be installed to maintain the
integrity of the arc resistant enclosure.
Figure 3.11 EntelliGuard racking handle
EntelliGuard Racking Handle
(1)
©2016 General Electric. All rights reserved.
Courtesy of NationalSwitchgear.com
AKD-20 AR / Entellisys AR Low-voltage Switchgear
Section 3. Switchgear Description
Figure 3.12 EntelliGuard breaker compartment fascia
Circuit Breaker Door and Gasket
(1)
Breaker Position Indicator
(2)
Key Interlocks (Optional)
(3)
Access Port to Racking Mechanism
(4)
Racking Handle
(5)
Figure 3.13 EntelliGuard circuit breaker compartment
Cassette Side Barrier
(1)
Racking Arm
(2)
Cassette Bottom and Racking Box
(3)
Draw-out Rails
(4)
Figure 3.14 EntelliGuard circuit breaker compartment
Secondary Disconnects (Optional)
(1)
Position Switch Location (Pos. Switch not Shown)
(2)
Primary Disconnect Stab Tip (Typical)
(3)
12
Advertisement
Table of Contents
