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10
Removal from cell in indoor switchgear (if
not on raised pad) and Shelter-Clad
outdoor switchgear
After performing the spring discharge check
(with control power de-energized), remove
the circuit breaker from its switchgear cubicle.
1. Insert the racking crank on the racking
screw on the front of the circuit breaker
cell, and push in (refer to "Racking crank
engagement procedure" on page 11). This
action operates the racking-interlock
latch. Figure 2: Type GMSG vacuum circuit
breaker racking on page 11 shows circuit
breaker racking.
For arc-resistant type GM-SG-AR switchgear,
rotate the racking access cover to enable
insertion of the racking crank.
2. Rotate the racking crank counterclockwise
until the circuit breaker is in the
DISCONNECT position, as indicated on the
racking mechanism.
Open the circuit breaker compartment
door. For arc-resistant type GM-SG-AR
switchgear, slide the covers to the side
that allows the circuit breaker to rollout of
the cell.
3. Depress and hold down the circuit breaker
racking latch release handle and pull the
circuit breaker out from the DISCONNECT
position. The circuit breaker can now be
removed from the cubicle.
4. The circuit breaker is now free to be rolled
out onto the floor using the handles on the
front. The wheels of the circuit breaker
are at floor level (unless the switchgear is
installed on a raised pad), and one person
can handle the unit.
Heavy weight.
Can result in death, serious injury or property damage.
Observe all handling instructions in this instruction manual to prevent
tipping or dropping of equipment.
Removal from cell in outdoor non-walk-in
enclosures or for indoor switchgear
installed on a raised pad
Removal of the circuit breaker from a non-
walk-in outdoor-switchgear assembly is
similar to removal of a circuit breaker at floor
level with several additional steps.
The procedure for removal of a circuit breaker
not located at floor level is:
1. If the circuit breaker is in the DISCONNECT
position, skip to step 4. Close the circuit
breaker compartment door and secure all
latches.
2. Insert the racking crank onto the racking
screw on the front of the circuit breaker
cell, and push in (refer to "Racking crank
engagement procedure" on page 11). This
action operates the racking-interlock
latch.
For arc-resistant type GM-SG-AR switchgear,
rotate the racking access cover to enable
insertion of the racking crank.
3. Rotate the racking crank counterclockwise
until the circuit breaker is in the
DISCONNECT position.
4. Open the circuit breaker compartment
door, slide the covers to the side that
allow the circuit breaker to roll out of the
cell, and insert the two extension rails
into the fixed rails. Be sure the extension
rails are properly secured in place.
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