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' .
,,_)
. '
B.
ORAWOUT
AND LIFTING BAR
Cublcle-mou'
breakers
of the
drawout type
i
n
c
l
u
d
e
as
i
n
t
e
gr
a
l
parts the mechanism
to
r
ac
k the
b
re
a
k
e
r
In
an
d
out
of
the cubicle compartment,
the
drawout trip
Interlock
and the
drawout
position
markings.
Refer
to
F
i
g
ur
e
4.
Lifting
bar
(401)
may
be
u
se
d
to
lift
the breaker
when
it
Is being Inserted In
the
cubicle.
With
the breaker
in
p
o
s
i
t
ion on
t
h
e
ral
Is, the
f
ol
l
ow
i
n
g sequence should
be
used to
rack
the
b
r
e
a
k
e
r
Into the fully
connected position.
ON
ELECTRICALLY-OPERATED BREAKERS, BE CERTAIN THAT THE CONTROL SWITCH
Ot�
THE FRONT OF
THE
BREAKER IS
IN
THE
"OFF" POSITION.
1.
Lower
the
interlock
slide
(402)
to
expose
r
ac
k
i
n
g
screw (404}.
(l�verlng the interlock slide will
ac
t
u
a
te
trip rod
(
4
0
6
)
to tr
i
p
a
closed
breaker.
)
W
h
i
t
e
the interlock
slide is in
this
po
s
i
t
i
o
n
,
the
b
r
e
a
k
e
r
is
"trip-free"
and cannot
be closed.
2 .
With the
switchgear operating crank, rotate racking screw (404)
to
move
r
a
c
k
i
n
g
c levises (405) to
the
position shown where t
h
e
y
will
engage
w
i
t
h
fixed pins
(403)
in
the cubicle.
3.
The breaker
should
now
be
pushed
along
the
r
ai
l
s
to
the
"DISCONNECTED"
position.
At
the
same time
the racking clevises (405)
should
be
ch
e
c
k
e
d
to
see
that they
a
re in
c
o
r
r
e
c
t
alignment with cubicle
fixed,�
p
i
n
s
(403).
Counterclockwise
rotation of
the
operating
crank
wilt
now
rack
the
breaker
Into
the ''TEST"
pnd
c
on
n
e
ct
ed
posItions.
At the
''TEST''
and
connected positions,
interlock
(408) Is
In
Its
normal
horizontal
p
os
i
t
i
o
n
.
By
r
emov
in
g
op
e
r
a
t
i
ng
crank
and then r
a
i
s
i
n
g
interlock
slide (402), trip
r
o
d (406)
r
e
t
u
r
n
s
to t
h
e
extended position
permitting
t
r
i
p
shaft
(407)
to
reset
and the breaker
may
be
operated.
Between
''TEST" and
connected positions, the
cubicle interlock cam
(409)
raises
in
t
e
r
l
o
c
k
(408)
to
h
o
l
d
trip
rod (406) an
d trip shaft
(407) In the "trip-free"
p
o
s
i
t
i
o
n so
that the breaker
c
an
n
ot
be
closed
e
v
e
n
if
interlock
slide
(402) Is raised. This Is to
prevent
movement of a closed breaker
i
n
t
o
or
out
of the
c
o
n
ne
c
t
e
d
position.
4.
To
withdraw
the breaker from
the connected
p
os
i
t
i
on
,
the procedure
Is the same except that
the
direction
of
rotation of the
o
per
a
ti
n
g
crank Is clockwise.
CAUTION: TO
AVOID DAMAGE
TO
THE
RACKING
MECHAN I SM.
DO NOT
ROTATE
THE
OPERATING
CRANK IN THE COUNTERCLOCKWISE
DIRECTION
AFTER
T
H
E
BREAKER
HAS
REACHED
THE FULLY CONNECTED
POSITION.
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Summary of Contents for LA-1600
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