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GEK-731O,
Power Circuif Breokers
I.
Spreader
2. Drawout Rail
3. Breaker Rail
Pins
4. Slots in Rail
5. Trip
Button
6. Racking
Shaft
Arrns
7.
Housing
Racking Pin
' B. Rail Latch Link
9. Racking Position Indicator
10. Movable Inner
Housing
Fig.
3.
(8041582)
Inserting
the
breaker
2.
Position the
breaker
in front
of the
cubicle
intended
to receive
it
and engage
the
lifting
device.
A
special "spreader"
is
provided as
shown
in
Fig.
3.
The
hooks
of
the spreader
are
placed
in
the
forward
square-shaped
holes
in
the breaker side
sheets
for
standard
breakers,
and
inthe
holes
near-
est the back
for
AKRU fused
breakers.
3.
Open
the door of the breaker encloswe,
and
unlatchandpull forward
one
of the
rails
inthe
sides
of
the cubicle.
4.
Raise the breaker
until
the
rail
pins
in
the
breaker sides are a
few
inches above the slots in
the extended
rail.
6
5.
Extend the second
rail.
6. Align the pins
on the breaker with the slots
in the
rails
and
carefully lower
the
breaker, allow-
ing
the
pins
to
enter
their slots.
Make
sure the pins
go
all
the
way down to the bottom
of
the
slots;
re-
move the
lifting
device.
7.
Make
sure
the breaker
is
open
by pushing in
the
trip
button. While
holding
in
the
trip
button,
move the sLiding cover aside and then
engage the
racking
handle.
8.
If
itispossibletoturn
the handle
in
a
counter-
clockwise direction,
do so
until
the stop
is
reached
and
remove the
handle. If
the handle does not
turn,
remove
it.
This step
is
taken
to
align the
arms
on
the ends
of the rackingshaftso that
theywill
engage
the pins
in
the housing. If
the
racking mechanism
has not been operated while the breaker
is out
of
the
encloswe, the arms
will
be
in theright position
to
engage
the
pins andthis stepwillnotbe necessary.
9.
Make
sure
that
latches
on
the ends of
the ex-
tended
rails
are
in
the unlatched
position, and
by
pushing
on the breaker,
roll it
as
far
as
it will
go
into the enclosure.
10.
Put
the latches on
the ends
of
the
rails
into
their
locked
position.
11.
Push
in on the
trip
button, move the sliding
cover
to
the
right,
and
engage
the
racking
handle.
12. Rotate the handle clockwise.
After
about
five
revolutions, thebreaker
will
be
in the test position.
The
indicator in the
left
upper side
of the compart-
ment
will
show when
this
position
is
reached. If
the
control circuits are energized
and
the breaker
is
electrically
operated,
the motor
will
run
when
the secondary disconnects
engage. This
will
occur
on about the
third
turn
of
the handle. The motor
will
run,
charging the
closing spring, until the cut-
off switches are
actuated,
13.
h
the test
position, the
secondary discon-
nects,
which
carry
the
control. voltage,
are
con-
nected;
however,
the
primary
disconnects, which
connect
the
power
circuits,
are
still
widely separ-
atbd. At this
point, electrical control devices
on
the breaker may be
operated
for
the purpose of
testing.
14.
Further
clockwise
rotation
of
the
racking
handle
causesthebreaker to travel to the
connected
position, which
also
will
be shown
on the indicator
in
the equipment
compartment. During this
phase
of the racking operation, the spring-loaded fingers
of the
primary
disconnects on the
breaker
will
en-
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