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30
Installation
01.4IB.77000B
PowlVac-ND® Vacuum Circuit Breaker
Before inserting a circuit breaker into the
circuit breaker compartment, be sure that
the indicator flag on the front cover
of the circuit breaker displays “TEST”.
CAUTION
Before attempting to rack a circuit breaker
in or out of a circuit breaker compartment
equipped with a key interlock, make sure
that the interlock is unlocked and in the open
position.
CAUTION
The illustrations shown for all racking
procedures are provided to show device
locations and are intended only as a guideline.
These illustrations may not be representative
of site specific safety practices for performing
the procedure. Before attempting any racking
procedure, review Chapter 2.
NOTICE
Figure 10 Racking of the Circuit Breaker
2) Inserting the Circuit Breaker to the
Test/Disconnected Position
Prior to inserting the circuit breaker into the
circuit breaker compartment, make sure that
the control circuits are deenergized.
!
CAUTION
a. Verify that the circuit breaker
open/closed indicator displays
“BREAKER OPEN”
and if not, press the
manual trip operator to open the circuit
breaker.
b. To insert the circuit breaker into the
lower circuit breaker compartment,
open the compartment door and align
the wheels with the floor pan channels
of the compartment. Verify that the
floor pan channels are free of debris
prior to inserting the circuit breaker.
c. Roll the circuit breaker into the
compartment until the racking crank
arms make contact with the vertical
slots in the compartment. The
anti-rollout latch under the circuit
breaker will engage the block in the
compartment, preventing accidental
removal of the circuit breaker from
the compartment. Verify full insertion
into the circuit breaker compartment
by reading the racking position label
attached to the switchgear circuit
breaker mounting pan right side flange.
The edge of the front cover of the circuit
breaker should line up with the strip
delineating “
TEST
” on the label. If the
line does not appear, the circuit breaker
should be manually pushed towards the
primary disconnecting devices until the
strip appears even with the edge of the
circuit breaker front cover.
Note:
This is the Disconnected Position.