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AKD-20 AR / Entellisys AR Low-voltage Switchgear
Section 6. Installing and Removing Circuit Breakers
Installing a Circuit Breaker
General
DANGER: Electrical arc flash hazard. Personal
protection equipment required. Turn off power to the
equipment before working inside.
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.
1.
Prior to lifting a breaker to its intended compartment
location, observe the following precautions:
2.
Check the compartment to ensure that it is free of
foreign objects.
3.
Verify that the breaker is the correct type for that
compartment.
4.
Ensure that the breaker is open.
5.
Apply a thin fresh coat of GE lubricating grease
D6A15A2 to the breaker's primary disconnect
assemblies.
6.
Ensure that the position indicator on the
compartment is in the DISCONNECTED position and is
correctly positioned for initial engagement. To do
this, open the racking handle door, insert the racking
handle and rotate it fully counter-clockwise.
Installation Procedure
To install the EntelliGuard circuit breaker, proceed as follows:
1.
Carefully place the breaker in front of the section in
which it is to be installed with the primary
disconnects parallel and facing toward the front.
2.
Open the breaker compartment door by rotating the
door latch assembly clockwise.
3.
Attach the appropriate lifting beam (Table 6.1) to the
circuit breaker and breaker lifting device as shown in
Figure 6.3. The carabineers of the lifting beam
should be securely closed on the circuit breaker
lifting tabs.
4.
Using the switchgear breaker lifting device or a
suitable lifting mechanism and the appropriate lifting
beam, raise the breaker above the elevation of the
breaker compartment rails.
5.
Fully withdraw the rails to their stops.
6.
Slowly lower and guide the circuit breaker to align
with the breaker compartment. Prior to lowering the
circuit breaker onto the rails, be sure the breaker
metallic side frames (Figure 6.4 and Figure 6.6) are
aligned with the grooves in the cassette.
43
Courtesy of NationalSwitchgear.com
Figure 6.3 EntelliGuard lifting beam
Breaker Lifting Beam Hook
(1)
Lifting Beam
(2)
Envelope 1 Carabineer Position
(3)
Envelope 2 Carabineer Position
(4)
Carabineers
(5)
Circuit Breaker Lifting Tabs
(6)
Table 6.1 EntelliGuard circuit breaker lifting beams
Catalog Number Poles
GLD3F12
3
GLD3F3
GLD4F12
4
GLD4F3
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 or 2
Envelope 3
Envelope 1 or 2
Envelope 3
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