Safety POWELL PowlVac-ND, Руководство пользователя

Страница: 39 / 63

Powered by Safety
®
31 Installation
01.4IB.77000B
d. Insert the circuit breaker compartment’s
secondary disconnect plug into
the circuit breaker’s secondary
disconnect receptacle. Once the plug
is fully inserted, move the secondary
disconnect latch (Figure 11, a), from left
to right until it has engaged the housing
of the secondary disconnect plug
(Figure 11, c).
e. For circuit breakers built before March
2015 the following applies. Manually
extend the racking drive shaft extension
of the circuit breaker approximately
1” to ensure engagement with the
racking mechanism retainer assembly.
Close and latch the circuit breaker
compartment door. For circuit breakers
built after March 2015, a compression
spring pushes the telescoping portion
of the racking drive shaft against
the inside of the compartment door
automatically to ensure engagement
with the retainer assembly.
Note: This is the Test Position.
3) Inserting the Circuit Breaker to the Connected
Position
f. Insert the racking handle onto the
racking drive shaft extension
(Figure 13).
g. Turning the racking handle clockwise
will begin to rack the circuit breaker
into the compartment. When the circuit
breaker is racked into the compartment,
the force needed to rotate the racking
handle will be low at the beginning of
motion as the movement of the racking
crank arms is only opening the shutters.
Once the shutters are open, the circuit
breaker begins to move toward the
stationary primary disconnecting
devices. When the movable primary
disconnecting devices of the circuit
breaker engage with the stationary
primary disconnecting devices of the
compartment, the force required to
rotate the racking handle will increase
appreciably. This force will decrease
as the primary disconnecting devices
spread and engage fully. Continuing
rotation of the racking handle will cause
the circuit breaker to travel further into
the compartment insuring wipe or
overlap of the primary disconnecting
devices. Continue racking until the
breaker position indicator displays
“CONN”
as observed through the
compartment door view window. This
will be approximately 22 rotations
from the starting point. When the
circuit breaker reaches the end of
the racking travel, the operator will
notice an increased amount of force.
If the user continues to apply force, a
torque limiter on the racking handle
will produce a sharp clicking sound
indicating the torque limit is reached at
35 ft•lb. Should the operator continue
to apply force, the torque limiter will
continue to operate with no further
buildup of torque on the circuit breaker
racking mechanism (Figure 10).
h. Once the circuit breaker has reached the
connected position remove the racking
handle, and operate the circuit breaker
as required.
Note:
This is the Connected Position.