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
To Next Page
Loading...
