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GEK-7
21
01,
Low
V
olta ge
Swifchgeor
R
HOUSE
SIDE
SHEET
LOCK MOUNTING HOLES
ERLOCK SLIDE
r09c2075-31
RIVETS
1o9c2075-26
FlG.
24
(75C15002D Key Interlock
for
Fuse
Rollout comportment
There
is a
key interlock
system required
in
the
equip-
ment
to
keep
the fuse
rollout
in the
CONNECTED
or
DIS-
CONNECTED
position
unless
the breaker
associated
with
it
is locked
open.
A
key interlock
is
installed
in
the
breaker
compartment
in
the normal position.
(See
Page
26) A
companion
key interlock
is
installed
in
the fuse rollout
compartment.
Figure
24
shows
the
position of
the
interlock-
ing
devices
in this
compartment
when
the
key lock
bolt
is
extended.
Note
that
the
interlock
slide
is held forward
so
that
the racking wrench cannot
be placed
over the jackscrew
shaft,
This
prevents
the
fuse
rollout from
being racked
out
of
its
compartment.
Note
also
the interlock bracket
shown
in
Figure
24.
This
holds the
track lock
link in
the
closed
position
when
the lock
bolt is
extended
and
prevents
the
fuse
rollout from
being
pulled
out
of
the CONNECTED
position
by rotating
the
track
lock links.
In
Figure
24
the
part
numbers refer
to
sheet
and
part
numbers
in
the
0673D0500
series
of
drawings
except
when
a
fqll
drawing number
is
shown.
When
the
equipment
is
operating
normally
with
the
breaker
closed,
the
intedock key
is
retained
in the lock in
the breaker compartment.
In
order
to
withdraw
the
fuse
rollout, the
associated
breaker
must
be tripped,
the
inter-
lock slide
pushed
in, the lock bolt
extended,
and
the
key
removed.
The key
is
then
placed
in
the
lock
in
the
fuse
rollout
compartment and
the
lock
bolt is
retracted. Now
the fuse
rollout
can be
racked
out to
the
DISCONNECTED
position.
The operation
of
the key interlock
system should
be
checked
by
following
the
procedure
outlined
in
the
pre-
ceding
paragraph.
DOOR
INTERTOCKS
These
interlocks prevent
opening
of
the
compartment
door
when
the
breaker
is
closed.
DOOR
INTERLOCK FOR
AK
BREAKERS
(OPTIONAL)
Part
numbers
in Figure
25
refer
to
sheet
and
part
num-
bers
in the
0673D0500
series
of
drawings.
This
door interlock
consists
of a
link
(074-03)
mounted
on the inner
house side sheet
of
the
breaker
compartment.
A
combination torsion,
compression
spring
is
mounted
on
the
link pivot pin
and
biases
the
link in a
forward
direc-
tion.
One
end
of
the
link
engages
a clip
on
the
door latch
(640-02), and the
other
end
engages
with
the
rackout
mech-
anism interlock slide
627-46.
When
the
breaker
is
closed,
a
link
operated
by
the
breaker cross
bar
engages
in a
slot
in
the
interlock
slide.
This
prevents
the slide
from
moving
back. and then the door handle cannot
be
lifted.
When the
breaker
is
open,
the interlock
slide
is
released
from
the
link
actuated
by
the breaker.
It
can
now
be
moved
back
by
pushing
it
in.
The preferred
way
to
do
this is
to
use
the rackout
handle.
The
door
can then be
unlatched
by
raising
the handle
while the interlock
slide
is held
in
the
retracted
position.
If
required,
the
door
interlock
can be
defeated.
A
small
hole
is
provided
in
the door
in front of
the
interlock link.
By
inserting
a
tool
such
as a
screwdriver
through
this
hole,
the
link
can be
pushed
back
until
it
is
free
of
the
door
latch.
With
the
link
held
in this
manner,
the door
latch
can
be raised and
the door
ooened.
DOOR
TNTERLOCK
FOR AKR
BREAKERS
(OPT|ONAL)
Part
numbers
in Figure
26
refer
to
sheet
and
part
num-
bers
in
the
0673D0500
series
of
drawings.
This
door interlock
does
not
operate
in
conjunction
with
the
compartment door latch.
It
consists
of
a
hook
(844-04),
link
(8a4-03), spring
(844-35),
and bracket (844-05)
all
mounted
on the
rear of
the
compartment door.
See
Figure
26.
When the door is
open,
the spring
pulls
down
on
the
hook,
and
the
assembly
is
held against the back
of the
door.
When the door
is
closed-with an
open
breaker
in
the
com-
partment, the bracket
on the
breaker
pushes
against
the
bottom
of
the
link
(844-03) and
rotates
the
top
of
the
link
away
from
the door. When the door
is
closed
and
latched,
the
link
and
hook
assume
the positions
shown
in
the
"Door
Closed"
portion
of Figure
26.
When
the
breaker
is
closed,
the
keeper
swings
up
and under
the
hook,
and
the
door
cannot be
opened.
TRACK
LOCX
LINK
28
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