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28
Installation
PowlVac
®
STD Vacuum Circuit Breaker
IB-60201
The breaker position indicator on the
front of the circuit breaker should display,
“
BREAKER TEST/DISCONNECTED”
.
Rotate the racking handle in a clockwise
direction. The racking crank arms will move
downward and rotate until the breaker
position indicator displays
“BREAKER CONNECTED”
. A threaded
plate moving on a threaded portion of
the shaft prevents further rotation of the
racking drive shaft. Once the breaker
position indicator 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. It will not be possible to
remove the secondary disconnect override
device due to the interlocks described in
Ch 3 Equipment Description
,
c. r
AckInG
M
echAnISM
,
1) General Description
,
b. Interlocking.
Once again, push the manual trip operator
inward, depress the racking drive shaft
shutter, insert the racking handle and rotate
in a counterclockwise direction until the
racking crank arms are once more in the
fully withdrawn position and the breaker
position indicator displays
“BREAKER TEST/ DISCONNECTED”
. With
the racking crank arms in this position, the
secondary disconnect override device may
be removed from the secondary disconnect
receptacle.
Pole unit parts are energized at full circuit
voltage when the circuit breaker is in the
connected position. Before moving the circuit
breaker into the connected position, make
sure the main barrier assembly has been
properly fastened in place. Failure to do this
may cause serious damage or injury.
CAUTION
CAUTION
!
e. I
nSertInG
t
he
c
IrcuIt
B
reAker
I
nto
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c
IrcuIt
B
reAker
c
oMpArtMent
1) Prior to Inserting the Circuit Breaker into
the Circuit Breaker Compartment
2) Inserting the Circuit Breaker to the
Test/Disconnected Position
3) Inserting the Circuit Breaker to the
Connected Position
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 breakers into the metal-clad
switchgear equipment.
Be sure that 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.
IMPORTANT
IMPORTANT
!
Each circuit breaker and circuit breaker
compartment is provided with interference
plates which are designed to ensure that no
circuit breaker with less than the required
voltage, continuous current, or interrupting
current rating is placed in the incorrect circuit
breaker compartment. If you attempt to insert
an improperly rated circuit breaker into the