GE Industrial Solutions EntelliGuard 3200–5000 A Frames, 240–600 Vac - Manual (Page 11)

EntelliGuard™ 3200–5000 Ampere Power Circuit Breakers
Chapter 2. Breaker Installation and Removal
3
2.1 Introduction
EntelliGuard circuit breakers are installed in GE
Entellisys™ Low-Voltage Switchgear. Draw-out
construction permits activation of a new feeder, allows
rapid replacement of a circuit breaker, and facilitates
inspection and maintenance of the breaker with no need
to de-energize the entire switchgear lineup. EntelliGuard
breakers are used exclusively with the EntelliGuard
Messenger™.
2.2 Installing the Breaker
Use the following procedure to install the draw-out
breaker into its cubicle, as illustrated in Figure 2.
1. Before lifting a breaker to its intended compartment
location, observe the following precautions:
• Check the compartment to ensure that it is free of
foreign objects.
• Verify that the breaker is the correct type for that
compartment.
• Ensure that the breaker is OPEN .
• Apply a thin coat of D6A15A1 (MobilGrease 28,
catalog number 193A1751P1) lubricant to the
breaker’s primary disconnects.
• Insert the racking handle and rotate it fully coun-
terclockwise to ensure that the racking cams on
the breaker are correctly positioned for initial
engagement with the pins in the breaker cubicle.
The position indicator on the front of the breaker
should show DISC .
2. Attach the Lifting Bracket by locating the hooks at
the cutout notches in the top frame of the breaker.
Be careful to avoid damage to the control wiring
behind the frame.
3. Open the compartment door. With the rollout rails
positioned inside the compartment, raise the
breaker higher than the rails.
4. Pull the rails all the way out to their Withdrawn
position.
5. Slowly lower the breaker onto the rails so that the
grooves in the rollers on the side of the breaker
align with the rails.
6. Push the breaker into the compartment until the
spring discharge stop engages. This is the Discon-
nect position. Check to ensure that the secondary
disconnect block on the breaker is aligned and is
beginning to engage properly with the mating
disconnect block in the compartment. At this point
the racking cams are positioned to engage the fixed
racking pins in the compartment, ready to begin the
racking motion. Push the rails back into the
compartment.
7. Close the compartment door. Install the Remote
Racker accessory (WPEGRRLV) or the Racking
Handle (catalog number 0324B4721G001) through
the opening at the upper right of the door and onto
the racking screw. Rotate the screw clockwise using
either the Remote Racker or the Racking Handle
through the Test position, until the racking screw
comes to a solid stop. The breaker is now in the
Connected position, as shown by the legend CONN
on the position indicator flag. Note that a loud click
will be heard as the spring-loaded secondary
disconnect detent releases as the breaker moves
beyond the TEST position.
2.3 Removing the Breaker
Use the following procedure to remove the draw-out
breaker from its cubicle:
1. With the switchgear door closed and latched, open
the breaker.
2. Engage the Remote Racker accessory or the Racking
Handle with the racking screw. Rotate the screw
counterclockwise using either the Remote Racker or
the Racking Handle until the breaker travels from
the Connected position through the Test position
(as indicated by the legends CONN and TEST ,
respectively, on the draw-out position indicator)
and comes to a solid stop in the Disconnected
position (as indicated by the legend DISC on the
position indicator). At this point, the primary and
secondary disconnects are disengaged.
3. Open the compartment door and pull out the rails.
Depress the spring discharge lever, indicated in
Figure 1, to discharge the breaker’s closing springs.
Continue to depress this lever while pulling the
breaker out to its Withdrawn position.
4. Verify that the indicators on the front of the breaker
show that the springs are DISCHARGED and the
breaker is OPEN .
5. Attach the Lifting Bracket by locating the hooks at
the cutout notches in the top frame of the breaker.
Be careful to avoid damage to the control wiring
behind the frame.
6. Lift the breaker off the rails.
7. Push the rails back into the compartment, then
move the breaker forward until the primary discon-
nects clear the compartment. Lower the breaker
onto a flat surface free of protrusions that could
damage the breaker’s internal parts. Close the com-
partment door.
8. Place the draw-out mechanism in the Connect posi-
tion to deactivate the interlocks that would other-
wise prevent the breaker mechanism or contacts
from closing. Engage the Racking Handle to the
racking screw and turn it clockwise until it stops, as
indicated by the legend CONN on the position indi-
cator.