GE Industrial Solutions Remote Racking Operator: Low Voltage AKR Circuit Breakers - Manual (Page 8)

Remote Racking Operator for AKR Breakers
8
3-2 Description of Large Frame Remote
Racking Operator – 3200A-5000A AKR
Breakers
The remote racking operator consists of a drive
train, control switches, and attachment
brackets. The drive train is made of a gear
motor (1, Fig 5) a square drive socket (2, Fig 5),
which couples the breaker.
Two toggle switches and a circuit breaker are
included with each remote racking operator.
The START switch (3, Fig 5) housed in the hand-
held box (4, Fig 5) controls the power to the
motor. Pushing the button closes the switch
and in turn supplies power to the motor. This
control switch is spring loaded; therefore,
continuous pressure on the button is required
to keep the motor running. The motor
directional toggle switch (5, Fig 5) is mounted on
the motor housing. Two positions are provided,
“IN” and “OUT”. For racking toward the
CONNECT position, the switch should be set to
“IN”. For racking toward the DISCONNECT
position, the switch should be set to “OUT”. The
circuit breaker (6, Fig 5) senses the motor stall
current when the breaker reaches the end of its
travel, which causes the motor to stall. The
higher motor stall current trips the circuit
breaker to the OFF position and in turn shuts off
the power to the motor.
The ¼ turn shaft (7, Fig. 5) is designed to provide
the means for attaching the remote racking
operator to the front of the Large Frame
Breaker. The latch rod (7, Fig. 5) hooks into the
breaker connecting bracket for mounting the
remote racking operator to the breaker.
ATTACHING / REMOVING DEVICE
Attaching the Remote Racking Operator to
the Large Frame AKR Circuit Breaker
The circuit breaker must be in the OPEN position
before attempting to attach the remote racking
operator to the breaker. Slide either the upper
or lower racking screw access cover (located on
the upper right corner of the breaker cubicle
door) to the left. This will expose two openings
in the breaker cubicle door. The upper opening
is for the ¼-turn latch rod and the lower
opening is for the square drive coupling.
Position the remote racking operator so that the
square drive coupling and ¼-turn latch rod are
aligned with the openings in the breaker cubicle
door. Push the remote racking operator toward
the breaker so that the square drive coupling
engages the square racking shaft and the ¼-
turn latch rod engages the breaker frame. If the
coupling and the shaft are not in alignment,
rotate the motor shaft extension on the back of
the motor housing in either direction until the
square drive aligns with the square racking
shaft. When they are in alignment, the remote
racking operator will slide further through the
breaker cubicle door. Rotate the ¼-turn latch
rod counter-clockwise to lock the remote
racking operator to the breaker.
Removing the Remote Racking Operator from
the Large Frame AKR circuit breaker
Hold the remote racking operator securely and
rotate the ¼-turn latch rod clockwise to release
the remote racking operator from the breaker.
Pull the remote racking operator away from the
breaker cubicle door. The racking screw access
covers will close automatically.