Powell Power/Vac - H. INTERFERENCE INTERLOCK; I. CLOSING SPRING GAG INTERLOCK

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Operation
01.4IB.67000
Rack the breaker toward the connected
position using the manual racking handle. The
spring discharge interlock should discharge the
breaker springs in three to five turns.
Continue to rack the breaker to the connected
position. Just before reaching the connected
position, the spring charging motor will
reenergize to charge the closing spring. Close
the breaker. Attempt to install the racking
crank. This should not be possible because it
should be blocked by the positive interlock.
Trip the breaker. Rack the breaker toward the
disconnected. The spring discharge interlock
should discharge the breaker closing springs
in 3 to 5 turns. Continue to rack the breaker
to the disconnected position. Re-energize
the secondary disconnect device as before to
cause the spring charging motor to charge the
breaker closing springs. Raise the racking arms
to the release position and roll the breaker
forward. The spring discharge interlock should
discharge the breaker closing springs before
traveling / inch.
If the interlock does not function as
indicated DO NOT MAKE ANY ADJUSTMENT.
CONTACT THE NEAREST POWELL SERVICE
REPRESENTATIVE FOR INSTRUCTIONS.
H. INTERFERENCE INTERLOCK
The function of the mechanical interference
interlock is to permit only breakers with the
same ratings to be inserted in any specific
compartment.
This interlock consists of two mated comb-like
plates, one on the equipment and one on the
breaker. The equipment interference plate
is permanently fastened to a cross member
located just below the breaker mechanism
frame device panel.
To prevent damage, DO NOT remove, replace,
or readjust the rating interference plates
on wither the metal-clad switchgear or
the Power/Vac circuit breaker. In case of a
problem consult the nearest Powell service
representative.
!
CAUTION
I. CLOSING SPRING GAG INTERLOCK
An interlock is provided at either the front
or rear on the left side of the breaker frame
to prevent racking in a breaker which has
the spring blocking device (pin or plate) in
the gagged position. The spring blocking
device must be removed so that the interlock
interference may reset to allow the breaker to
be racked.
See the latest version of the circuit breaker
instruction bulletin 01.4IB.66000 for use of the
closing spring blocking device.
Gagging closing springs when they are in the
discharged position can damage the breaker.
The breaker side frame may be deformed
and/or the gearmotor may be be damaged.
CAUTION