GE Industrial Solutions EntelliGuard 800–2000 A Frames, 240–600 Vac Maintenance Manual - Manual (Page 21)

EntelliGuard™ 800–2000 A Power Circuit Breakers
Chapter 5. Breaker Maintenance
11
WARNING: Before inspecting a breaker or
beginning any maintenance, the breaker must
be disconnected from all voltage sources, both
power and control, and the breaker must be in
the OPEN position.
AVERTISSEMENT: Avant d’inspecter ou de
débuter tout travail de maintenance d’un dis-
joncteur, celui-ci dout être en position OPEN et
débranché de toutes les sources de voltage, à la
fois de puissance et de contrôle.
5.1 Lubrication
Bearing points and sliding surfaces should be lubricated
with a thin film of GE Lubricant D6A15A1 (MobilGrease
28, catalog number 193A1751P1). Clean the surfaces to be
lubricated with an industry-approved solvent.
Note: Remove all excess lubricant with a clean, lint -
free cloth to avoid accumulation of dirt or dust.
The contact surfaces of the primary disconnect fingers
should be cleaned and lubricated with GE Lubricant
D6A15A1.
Note: Do not lubricate the main, intermediate, or
arcing breaker contacts or the outside diameters of
rollers. Also do not lubricate the ground radius on the
closing prop or trip latch, as this will cause
accumulation of dirt and dust.
5.2 Removing and Reinstalling the
Breaker
Maintenance or inspection should be performed with the
breaker removed from the compartment and placed on a
workbench. Figure 4 illustrates these procedures.
Removing the Breaker
1. With the compartment door closed and latched,
trip the breaker.
2. Push the OPEN button and slide the racking screw
access door to the right, exposing the racking screw.
3. Engage the Remote Racker accessory (WPEGRRLV)
or the Racking Handle (0324B4721G001) 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.
4. Open the compartment door. Pull out the rails,
then pull the breaker out to the withdrawn position
at the track travel limit
5. Verify that the indicators on the front of the breaker
show that the springs are DISCHARGED and the
breaker is OPEN .
6. Attach the lifting bracket (catalog number
0324B4551G1) by locating the hooks in the slots on
the side of the breaker and on the closing spring
anchor pin. Raise the breaker until its mounting
wheels clear 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.
Installing the Breaker
Use the following procedure to install the draw-out
breaker into its compartment.
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 the
compartment.
• Ensure that the breaker is OPEN .
• Apply a thin coat of GE lubricant D6A15A1 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 in
the slots on the side of the breaker and on the clos-
ing spring anchor pin.
3. Pull the rails all the way out to their withdrawn posi-
tion.
4. Slowly lower the breaker onto the rails so that the
grooves in the rollers on the side of the breaker
align with the rails.