Table of Contents
Advertisement
DEH-41473
7.
With both sides of the circuit breaker aligned with the
grooves in the cassette, slowly lower and guide the
breaker to allow the 4 breaker wheels to align with
the rails (Figure 6.5). Remove the lifting beam. The
breaker is now positioned on the draw-out rails.
8.
Roll the breaker into the compartment until the
racking forks meet the racking pin, this is the
DISCONNECTED position. If an incorrect breaker has
been installed, the interference pins on the breaker
will interfere with the rejection blocks in the
compartment prior to reaching the disconnect
position. At this point, the racking forks on the
cassette are contacting the fixed racking pins on the
breaker.
9.
Slide rails back into compartment. Close the
compartment door and latch (Figure 3.18).
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. Engage the racking handle (Figure 6.7) by using a slot
screwdriver to open the racking shaft door by
rotating it clockwise, then insert hex manual racking
handle.
11. Rotate the handle clockwise as far as it will go. As
you rotate the handle clockwise, the breaker will
travel from the DISCONNECTED, through the TEST
position (you will notice an audible click), and then
into the CONNECTED position. The breaker position
can be seen on the indicator barrel, located on the
cassette escutcheon (Figure 6.7).
12. 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.
Figure 6.4 EntelliGuard lifting beam
Circuit Breaker Side Frame
(1)
Cassette Groove
(2)
©2016 General Electric. All rights reserved.
Courtesy of NationalSwitchgear.com
AKD-20 AR / Entellisys AR Low-voltage Switchgear
Section 6. Installing and Removing Circuit Breakers
Figure 6.5 EntelliGuard circuit breaker on draw-out rails
Circuit Breaker Wheels
(1)
Cassette Draw-out Rails
(2)
Figure 6.6 Circuit breaker lifting device
Switchgear Breaker Lifting Device
(1)
Operating Crank
(2)
Lifting Beam
(3)
Circuit Breaker Side Frame
(4)
Figure 6.7 EntelliGuard racking handle
Circuit Breaker Position Indicator
(1)
Racking Shaft Access
(2)
Racking Handle
(3)
Figure 6.8 EntelliGuard racking handle storage
EntelliGuard Racking Handle
(1)
44
Advertisement
Table of Contents
