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AKD-20 AR / Entellisys AR Low-voltage Switchgear
Section 6. Installing and Removing Circuit Breakers
Removing a Circuit Breaker
To remove the EntelliGuard circuit breaker, proceed as
follows:
1.
Open the breaker by pressing the OFF/OPEN button.
2.
Use a slot screwdriver the open the racking shaft
door by turning clockwise (Figure 6-7). Insert the
racking handle and rotate it counterclockwise until
the breaker travels from CONNECTED through TEST
to the DISCONNECTED position, as shown by the
position indicator. This operation should be
performed with the door closed. If the breaker
closing spring is fully charged, it will be automatically
discharged when the breaker is moved to the
WITHDRAWN position.
3.
Open the compartment door and fully extend the
draw-out rails. Roll breaker out to rail stops. This is
the WITHDRAWN position.
4.
Before proceeding, visually check the breaker's
spring charge and close indicators to verify that
breaker is open and the springs are discharged.
5.
Attach the lifting device (Table 6.1) and raise breaker
off draw-out rails.
6.
Push the draw-out rails back into the compartment.
7.
Pull the breaker forward until the primary
disconnects clear the compartment.
8.
Lower the breaker onto a flat surface free of
protrusions that could damage the breaker's internal
parts.
9.
Close the breaker compartment door. If the circuit
breaker will be removed from the compartment for
an extended period of time. An optional future
cassette barrier and future front cover (Table 6.2)
should be ordered and installed to prevent access to
live conductor parts and maintain the integrity of the
arc resistant enclosure.
WARNING: The breaker compartment door must be
closed and latched to maintain the integrity of the arc
resistant enclosure. The breaker compartment door should
not be opened when the circuit breaker is closed and in the
connected position when the equipment is energized.
10. Return the racking handle to the right most pocket in
the breaker compartment (Figure 6.8).
WARNING: The EntelliGuard racking handle must be
returned to its compartment to maintain the integrity of the
arc resistant enclosure.
45
Courtesy of NationalSwitchgear.com
Table 6.2 Future cassette barriers and future door covers
Catalog Number Poles
GM2ARF1FC
GM2ARF2FC
Future Cassette Barrier
GM2ARF3FC
GM2ARFDC
Future Door Cover
WARNING: When a circuit breaker is removed from its
compartment. The future cassette barrier and the future
breaker door cover must be installed and the circuit breaker
compartment door closed and latched to maintain the
integrity of the arc resistant enclosure.
WARNING: Do not stand under the circuit breaker during
the lifting or lowering operation.
CAUTION: When using the switchgear breaker lifting
device, do not unwind the cable completely from the drum.
To lift the breaker, turn the device operating crank
clockwise. To lower the breaker, turn the device operating
crank counter-clockwise.
CAUTION: When lifting or lowering a circuit breaker, take
care to prevent the circuit breaker from rotating and hitting
components on the front of the equipment.
NOTICE: Envelope 1 and Envelope 2 circuit breakers share a
common lifting beam. The lifting beam has two unique
positions for the carabineers to properly lift each Envelope
size circuit breaker (Figure 6-3).
©2016 General Electric. All rights reserved.
DEH-41473
Envelope Size
Envelope 1
Envelope 2
Envelope 3
Env. 1, 2 & 3
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