Instruction Book
Effective: November 2017 Page 30
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IB131016EN
Figure 4-19 Circuit Breaker Shown in CONNECT
Position with Secondary Connections Made
During the levering process, the metallic primary safety
shutters in the cassette automatically move out of the way
exposing the fixed cassette stabs, thus permitting the
circuit breaker to make its primary connection (Figure
4-
20).
When the circuit breaker is levered from the
CONNECT position to the TEST position, the safety
shutters automatically close over the fixed primary stabs. A
padlocking device is provided on the side of the cassette to
permit padlocking the primary safety shutters in an open
position for inspection or in the closed position to prevent
inadvertent contact with the fixed primary stabs. Padlocks
must be removed before the circuit breaker is levered in
either direction to prevent shutter system damage (Figures
3-7, 3-9
and
4-21).
To lever the circuit breaker out of the CONNECT position,
reverse the process just described for levering the circuit
breaker to the CONNECT position. Remember that the
circuit breaker must be open before the racking screw lock
plate can be recessed to gain access to the large drive nut
(Figure
4-16).
Once the drive nut is accessible, engage it
with the socket and levering crank. Begin levering the
Figure 4-20 Primary Safety Shutters Shown in Open
Position with Fixed Primary Stabs Exposed
Figure 4-21 Padlocking Device on Side of Cassette
circuit breaker out of the CONNECT position by
turning the crank in a counterclockwise direction. As
the breaker approaches the TEST position, the
primary safety shutters automatically cover the fixed
stabs. Continue levering the breaker to the TEST
position where it will once again mate with the front of
its cradle. Refer to paragraph
4-6.3
for instructions on
how to disconnect the secondary umbilical cord from
the cassette if the breaker is to be removed from its
cassette. Disconnecting the umbilical cord will put the
breaker in the DISCONNECT position which is
necessary before removing it from the cassette.
Summary of Contents for 50 VCP-TR16
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