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Vehicle Description
3.
Make sure the primary disconnect contacts and sec-
ondary contacts are clean and free of foreign material
(Figure 5).
4.
Install the circuit breaker into the TEST position in the
circuit breaker compartment:
A.
Align the guide beneath the circuit breaker with the
rail on the circuit breaker compartment floor.
B.
Ensure that the racking device is extended and the
roller cam at the end of the racking device is in the
down position.
C.
Lift and hold the positioning handle on the circuit
breaker lower front panel in the COMPARTMENT
ENTRY or WITHDRAWAL POSITION and carefully
roll the circuit breaker into the compartment as far
as it will go.
NOTE: The COMPARTMENT ENTRY or WITH-
DRAWAL POSITION occurs when the positioning
handle is lifted to the top of the slot (Figure 4).
A mechanical stop on the compartment floor
prohibits the installation of a 1200-amp circuit
breaker in a 2000-amp compartment; however,
a 2000-amp circuit breaker will enter a 1200-amp
compartment.
D.
Ensure that the positioning handle on the circuit
breaker lower front panel has returned to the OP-
ERATING POSITION
NOTE: The OPERATING POSITION occurs when
the positioning handle is at the bottom of the slot
and the padlock tabs are lined up.
When the positioning handle is in the operating
position, the interlock plunger beneath the circuit
breaker engages the slot in the rail on the compart-
ment floor. The circuit breaker can be left in this
position in the compartment for storage.
The circuit breaker can be padlocked while in this
position.
Any further engagement of the circuit breaker must
be done by racking with the racking crank.
5.
Operate the circuit breaker in the TEST position in the
circuit breaker compartment:
To Engage Secondary Disconnects:
A.
Pull the secondary contact handle all the way
out.
B.
Turn the handle 90 degrees counterclockwise (do
not turn the handle clockwise) to the horizontal
position.
C.
Push the handle back into the circuit breaker, se-
curely engaging the receptacle in the back of the
circuit breaker compartment.
NOTE: An impact motion is most effective.
D.
Ensure that the positioning handle is in the OPER-
ATING POSITION.
E.
Energize the desired control circuits.
To Dis-Engage Secondary Disconnects:
F.
Retract the secondary contact plug by pulling out
the handle or by rolling out the circuit breaker.
G.
Turn the handle 90 degrees clockwise (do not turn
the handle more than 90 degrees) to the vertical
position.
H.
Slide the handle into the circuit breaker for stor-
age.
6.
Install the circuit breaker into the CONNECT (operating)
position in the circuit breaker compartment:
A.
With the circuit breaker in the TEST position in the
circuit breaker compartment, turn the positioning
handle to the RACKING POSITION and, while hold-
ing the handle in this position, insert the racking
crank all the way.
B.
Turn the racking crank clockwise to move the
circuit breaker into the compartment.
NOTE: On the first one-third turn of the racking-
crank, the roller cam at the end of the racking
device rotates in the keyhole at the back of the
compartment and opens the shutter covering the
primary terminals.
C.
Continue racking until the CONNECT position
is reached and the racking crank will no longer
turn.
NOTE: Racking becomes more difficult as the
primary disconnect contacts and the secondary
contacts join with their respective connections in
the back of the compartment.
D.
Remove the racking crank and ensure that the po-
sitioning handle is in the OPERATING POSITION.
Figure 4. Compartment Entry or Withdrawal Position
5
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