GE AKD-6 - Page 26

GEK-7
21 0 l,
Low V oltoge Swilchgeor
thus cannot
be closed when it is between
the TEST
and
the CONNECTED
positions. From the TEST to
the DIS-
CONNECTED
position,
the breaker can
be closed when
the rackout
handle is disengaged.
An indicator,636-03,
which
is visible through
an
opening
in the
front of the door,
shows the
position
of the
breaker in
the house. The
TEST
position
is reached
when
the
line
on the
indicator label
marked TEST
is aligned
with
the
stationary
line
on the
indicator housing.
In this
position,
the
breaker
can be
operated
when the
rackout
handle
is disen-
gaged.
The
secondary
control
power
disconnects
are
en-
gaged
and the
primary
power
disconnects
are open
in this
position.
The
DISCONNECTED
and CONNECTED
positions
are
indicated by
the sight
indicator
and by the
rackout
mecha-
nism reaching
the
end of
its travel.
The adjusting
nuts on
the rackout
mechanism
(located
on the
breaker)
are set to
stop the
rotation
of the racking
arms
at the
correct
points
at both
ends
of the
action. The
motion of
the rackout
mechanism
can
be reversed
at
any
point
in the
cycle by
re-
versing
the direction
of rotation
of the handle.
CAUTION:
WHEN
MOUNTING
AN
AKRTYPE
BREAKER
ON THE
TRACKS
PRIOR
TO
IN-
SERT/ON,
BE SURE
THAT
THE
IN]VER
HOUSE
IS PULLED
OUT
AS F/R
.4S
POS-
SIBLE TO
THE
DISCONNECTED
POSITION
BEFORE PULLING
THE TRACKS
OUT.
SEE
,,HOISTING
AND
/]VSERTIJVG
AKR
AND
AKRU BREAKERS"
ON PAGE
17.
IF AN
AT-
TEMPT
IS MADE
TO SET
A BREAKER
ON
THE
TRACKS
1{ND
FUSH
IT INTO
THE
COM-
PARTMENT
WHILE
THE
INNER
HOUSE
IS
IN
THE CONNECTED
POSITION,
IT WILL
NOT GO
ALL
THE WAY
IN
BECAUSE
IT
WILL
BE
BLOCKED
BY THE
STOP
L/1VKS
(634-47
IN
FIGURE 2O).
AT THIS
POINT
THE
TRACK
LOCK
LINKS CANNOT
BE
ROTATED
TO
THE LATCHED
POSITION
AND
THE
RACKOUT
MECHANISM
WILL
NOT
FUNC.
TION CORRECTLY.
NOTE:
THE
"EMERGENCY
OPERATION"
DESCRIBED
FOR AK-75/
lOO
BREAKERS
OJV
PAGE
25 CANNOT
BE PERFORMED
FOR
AKR OR
AKRU
BRE.AKERS
DUE
TO
DIF-
FERENCES
IN THE
DRAWOUT
MECH-
ANISMS.
KEY INTERTOCKS
KEY INTERIOCKS
FOR AK BREAKERS
(OPTIONAL)
Part numbers
in Figure 21
refer to sheet
and
part
num-
bers
in the 0673D0500
series of drawings.
The key
interlock is
mounted with
two
one-way screws
and lock
washers
to the
left side
of the
inner house.
The interlock
system is designed
so that
the key
may be
removed
from the lock
only
if the breaker
is tripped
and
the lock
bolt
is
extended.
When the bolt
is extended,
the
breaker is rendered trip
free only in the CONNECTED
po-
sition in the house.
The
breaker may be operated
(closed
and
tripped)
in the
TEST or DISCONNECTED
positions
even when
the
lock bolt is extended and the key removed.
The operation of the key interlock should
be checked
as follows:
l. With the breaker
in the CONNECTED
position,
man-
ually
trip the breaker.
This then allows the
interlock trip
slide
(622-66)
to be
pushed
in. The
preferred
way
to do
this
is with the
rackout operating
handle. When the trip
slide
is
in, the lock
bolt
may
be
extended
and the
key removed.
The interlock slide may then be allowed to return to its
normal reset
position.
The breaker
will
remain trip free
in
the CONNECTED
position
until
the key is returned
and
the lock
bolt is retracted.
2. If desired, the breaker may be moved
to either the
TEST or the DISCONNECTED
position
while
the key
is
removed from the lock.
In
these
positions
the breaker
can
be
operated for checking
or
maintenance.
IMIERLOCK TRIP SLDE
522.66
26
FlG.
2l
(Ol2lCl5O7)
Key
Interlock
for
AK breokers