IB
6.1.12.1-1C
1
4
ABB
INSTALLATION AND REMOVAL
NOTE:
If a breaker with OD devices has been
shipped or stored on its back, then oil in the dashpot
might have been displaced and an air bubble trapped
under the piston. Before installing the breaker, with
the breaker in the upright position, exercise the long-
time armature of each breaker phase (the 5/8” wide
armature) several times until resistance to motion has
increased. Resistance indicates that air entrapment
has cleared and the oil dashpot is functioning
properly.
CAUTION
Do not lift the breaker by the primary disconnects. Use a chain
and hooks in the top hole of the vertical frame channels or a
lifting yoke. Be careful not to damage the disconnects when
installing or removing a breaker in the switchgear.
Stationary Type
DANGER
When installing or removing stationary breakers, the supply for
primary and control circuits must be de-energized at all times.
Testing of stationary circuit breakers must be done with the
primary supply circuit de-energized.
A lifting yoke should be used to move the breaker to
the switchboard. Other handling means may be
required to move the breaker into position inside the
switchboard.
Draw-out Type
When moving between positions, confirm that the
racking shutter closes fully after removing the handle.
If it closed partially, then the breaker is not yet fully in
position.
For initial installation of draw-out breakers into the
CONNECTED position, the supply for the primary
circuit should be de-energized (even though the
breaker will be open). Perform any operational tests in
the TEST position.
Proceed as follows to install and connect a circuit
breaker in its compartment:
1. The circuit breaker must be in the open position,
the racking mechanism cranked fully in the CCW
direction against its stop, and the motor disconnect
switch (EO circuit breakers) in the OFF position.
2. Open the compartment door and pull out the right-
hand and left-hand cradle rail to the fully extended
and latched position.
3. Using a lifting yoke, lower the circuit breaker so
that the positioning pins, two on each side of
breaker, rest in the cut-out sections of each rail.
4. Remove the lifting yoke and push the circuit
breaker toward the compartment. The breaker will
slide on its positioning pins to the rear of the cut-
out sections in the rails. An additional push will
overcome the two cradle latches allowing the
circuit breaker to move into the DISCONNECTED
position. The draw-out arm of both sides will make
initial cradle engagement.
5. Lift the racking shutter, insert the racking handle,
and crank CW. Rack from the DISCONNECTED
position into the TEST position. Make operational
checks as described in the Maintenance Section
before placing the breaker in the CONNECTED
position for online service.
Proceed as follows to rack a CONNECTED circuit
breaker into the TEST position:
1. With the compartment door closed, trip the circuit
breaker open.
2. Lift the racking shutter and insert the racking
handle. Rack CCW until the decal on the right-
hand side of the escutcheon indicates the TEST
position.
NOTE:
This position was designed for
making operational checks. The control circuit is
energized, but the primary disconnects are not
connected.
Proceed as follows to disconnect and remove a circuit
breaker from its compartment:
1. Turn the motor disconnect switch OFF. If closed,
open the breaker. Draw-out CCW until the racking
mechanism reaches its stop. If the mechanism is
charged, expect an automatic spring discharge just
before reaching the fully DISCONNECTED
position (EO breakers).
2. Pull the circuit breaker forward until both cubicle
rails are in the fully extended and latched position.
3. Position a lifting yoke. To keep the yoke hooked
into the breaker, partially lift the circuit breaker
weight.
4. With a positive pull, slide the breaker forward on its
positioning pins in the track of both rails. Notice
that the track for the positioning pins has a locking
action in both ends of the cut-out. If the breaker is
slid too far forward, it will remain secured in the
rails.
5. Lift the circuit breaker from the rails.
6. Release the latch on each rail and push the rails
back into the compartment. Keep the compartment
door closed.
