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Low
V
oltoge Swifchgeo
r,
GEK-7
21
01
HOISTING
AND
INSERTING AKR
AND
AKRU
BREAKERS
With
the inner
housing
in
the compartment
in
the
CON-
NECTED position
proceed
as follows:
l.
Put
the breaker
in front of
the
unit in
which
it
is
to
be installed. Be sure
it
is
tripped.
2.
Open
the compartment door and
remove
the
bolt with
the yellow
head and
the
shipping
tag from the track
as-
sembly. Discard
the
bolt
and
tag.
3.
Pull
inner
house
forward
as
far
as possible.
It
is
now
in
the DISCONNECTED
position.
4. Rotate the two track lock links, and
pull
the right
track
all
the
way forward.
See
Figure
16.{.
5.
These breakers
require
a
spreader
bar
when
hoisting
them
to
avoid
damaging
their arc
chutes.
For
hoisting,
there
are
two slots
in
each
of
the
breaker's side
frames.
When hoisting
the
non-fused breaker,
the
spreader bar's
hooks are positioned
in
the forward
slots.
When
hoisting
the fused breaker, the hooks are positioned
in
the
rear
slots.
Pay
out
enough
hoist
cable
to
install
one
hook
in
the
hole
in the
center
of
the
spreader
bar.
Figure
17 shows
a
fused breaker, spreader
bar
and
hoist
cable.
CAUTION:
DO NOT UNWIND CABLE
COM-
PLETELY FROM DRUM,
OPERATING
CRANK
MUST TURN
CLOCKWISE
TO
HOIST
THE
BREAKER: COUNTER.CLOCKWISE
TO
LOWER
IT.
6. Raise
the
breaker
until
the
breaker
mounting pins
are
approximately
one
inch
above
the tracks.
See
Figure
16D.
WARNING:
DO NOT
ST/ND
UNDER BREAKER
DU RI
NG
HOISTING
OPERATION.
7.
Pull
the remaining
track out to
the
limit of its
travel
and lower breaker
so
the
breaker
mounting pins
drop
into
the slots
in
the
track.
Remove
the
lifting
device.
See
Fig-
ures
16E
and
F.
CAUTfON:
THE
TRACKS OF
/NNER
FiOUSES
FOR/KR
BREAKERS
ARE
ESUIPPED
WITH
P/ITTS
SO
THAT BRE,4KERS OF
AN
INCOR-
RECT RATING CANNOT
BE
SET
ON
THE
TRACKS.
THIS
PREVEITTS /TTSERTION OF
A
LOWER
RATED BREAKER
IN A
COM-
PARTMENT.
8. Engage
the
racking
handle.
This
is
done
by
pushing
the
trip
button
in
the
breaker
escutcheon,
sliding
the
cover
below
it
to
the
right,
and inserting the
handle on
the jack-
shaft.
9. Turn
the
handle counter-clockwise as
far
as
it
will
go
(if it
will
move
in that direction)
and
remove
the
handle.
10.
Push
the
brea*er
in
against the
track
stops.
Rotate
the two
track
lock
links
to
lock the
breaker
in
place.
Close
the compartment door.
See
Figure
16G.
11. Engage
the
racking handle again
as
in
Step
8,
and
rotate the
handle clockwise as
far
as
it
will
go.
Towards
the
end,
a high
force requirement
will
be
felt
as
the
dis-
connect fingers
on the
breaker
engage
the stationary
studs.
A
couple
of turns later,
and the stop
will
be
encountered.
The position indicator
will
now
show CONN.
NOTE:
ALL
BREAKER
COMPARTMENTS
DESIGNED
FOR
FUTURE USE
HAVE
PRO-
T
ECT IV
E
B/RR/ERS
I
N
ST
ALLED
T
H
E
REI
N,
SEE
FIGURE
15.
BREAKER
REMOVAL_AK
BREAKERS
l.
Trip
the
breaker.
2. Insert handle on
jackscrew
shaft located on
left
hand
side
of
compartment.
3.
Rotate handle
counter-clockwise
until
jackscrew
is
stopped.
(Indicator
should read DISC).
4.
Remove
handle and
open compartment
door.
5.
Rotate the
two track lock
links
and
pull the
breaker
all
the way forward. The breaker may now
be
lifted
from
the tracks
by the
lifting
device.
BREAKER
REMOVAL-AKR
AND
AKRU
BREAKERS
1.
Trip
the
breaker.
2.
Engage
the racking handle.
This
is
done
by
pushing the
trip
button
in
the
breaker
escutcheon,
sliding
the
cover
below
it
to
the
right,
and inserting the
handle
on the jack-
shaft.
3. Turn
the handle counter-clockwise
as
far
as
it will
go.
If
the
breaker closing spring
is
fully
charged,
it will
be
dis-
charged
automatically
a
few turns
before
the
end
of
the
action. (Indicator
should read DISC.)
4. Remove handle
and
open
compartment
door.
.5.
Rotate the
two
track lock links
and
pull the
breaker
all
the
way
forward. The
breaker
may
now be
lifted
from
the
tracks
by
the
lifting
device.
I
l5
(8042650)
Provision
for
future breoker
with
protective
bq
rrier
FIG.
17
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