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31
Installation
01.4IB.65131
Once again depress the racking drive shaft
shutter, insert the racking handle onto the
racking drive shaft and rotate in a clockwise
direction until the racking crank arms are
once more in the fully withdrawn position
and the breaker position indicator displays
“
BREAKER TEST/DISCONNECTED
” .
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Pole unit parts are energized at full circuit
voltage when the circuit breaker is in the
connected position. Before moving the circuit
breaker into that position, make sure the main
barrier assembly has been properly fastened
in place. Failure to do this may cause serious
damage or injury.
!
CAUTION
Refer to the metal-clad switchgear instruction
bulletin and drawings produced specifically
for the installed equipment for additional
information and cautions before attempting
to insert the circuit breaker into the metal-clad
switchgear equipment.
Ensure the racking crank arms at the sides of
the circuit breaker point in the direction of the
primary disconnecting devices and the circuit
breaker position indicator displays breaker
test/disconnected.
NOTICE
6) Emergency Racking Mechanism Check
The emergency racking mechanism must
be checked outside the circuit breaker
compartment.
The emergency racking drive shaft can be
accessed by moving the emergency racking
drive shaft shutter (
) downward.
Note:
The emergency racking drive shaft
shutter cannot be moved downward
unless the circuit breaker is OPEN.
Insert the racking handle onto the racking
drive shaft. The racking crank arms at the
sides of the circuit breaker should be in the
fully withdrawn position and point towards
the primary disconnecting devices.
The breaker position indicator on the front
of the circuit breaker should display,
“BREAKER TEST/DISCONNECTED”
. Rotate
the racking handle in a counterclockwise
direction. The racking crank arms will move
downward and rotate until the breaker
position indicator displays
“BREAKER CONNECTED”
. Positive stop
bolts that prevent the racking cranks
arms from rotating prevent further
rotation of the racking shaft. Once the
breaker position displays
“BREAKER
CONNECTED”
the racking mechanism
will have reached the end of its travel and
a significant increase in the amount of
resistance encountered will indicate that
further force should not be exerted. Once
factory torque limits are reached a torque
limiting clutch on the racking handle will
engage and disallow any further racking.
In this position, the racking handle may be
removed from the racking drive shaft and
the racking drive shaft shutter will spring
back to the closed position.
