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GEK-7
21
01,
Low
V
oltage Swifchgeor
When the door
is
closed
with a
closed breaker
in
the
compartment,
the bracket
on
the
breaker
causes
the
link to
rotate away
from the
door.
ffowever,
when
the
slope
on
the back
side
of the
hook
contacts
the
keeper,
the
hook
will
be
lifted
over the
top of the
keeper
and
will
again
drop
into
the position
shown
in
Figure
26,
thereby holding
the door
closed.
When
the
breaker
is
opened,
the
keeper swings
down
and
away
from the
hook, and the compartment
door
can
be
opened.
If
required,
this
door interlock
can
be
defeated
by
insert-
ing a
small
tool
such as
a
screwdriver
through
the
hole
in
the
door
above
the bracket.
This
will
push
the
lower
part
of the hook toward the rear
of
the
compartment
and
the
top
will
move
up and
away
from the
keeper,
With
the
hook
held
in this
position,
the
door can
be unlatched and
opened.
RACKOUT
MECHANISM PADTOCK
DEVICES
These devices
are
arranged
so
that the
rackout
mech-
anism
may be
padlocked
in
certain
positions
to
prevent
unauthorized
operation.
PADLOCK DEVICE
FOR
AK
BREAKERS
(OPTIONAI)
This
accessory
consists
of
a slotted
piece
(622-02) which
is
riveted
to the inner
house
side
sheet.
The
slot
matches
the slot
of
the
extension
on the interlock slide.
See
Fig-
ure
25.
When one
to
three padlocks are inserted
into
the
slot
in
the
plate,
the interlock
slide
cannot
be
retracted
and
the
jackscrew cannot
be turned. The rackout
mechanism
can be
locked anywhere
in its
travel.
It
is
necessary
to
open
the compartment door
in
order
to
place
the
padlocks
in
the
device,
but
once
the
locks are
secured,
there
is
no
interference
with
the door and the door
may
be
opened
or
closed
at will.
PADTOCK DEVICE FOR AKR
BREAKERS
(OPTIONAI)
This
accessory consists
of two
plates,
each
having
holes
for
padlock
shackles.
One
of
the
plates
is
bolted
to
the
unit
side
sheet
and
the
other
to
the inner
house. They
occupy
the
upper
left
corner
of
the compartment.
See
Fig-
ure
7
for a pictorial view
of
the
device.
The holes
match
when
the
inner house is
in
the TEST or
DISCONNECTED
position, and
tbese
are
the only
two
positions
in
which
the
rackout
mechanism can
be
locked.
Only
one
padlock
can
be
used
with
this
device.
If
more padlocks
are
required, a
lock-
out
device
is
furnished.
This
has
a
single
ring
and
provi-
sions
for
locking the
ring
with
six
padlocks,
thus
perform-
ing the multiple
padlock function. The compartment
door
must
be
opened
to put
the
padlock
or lockout
device
on,
but
there
is no
interference
with the
door
after they
have
been
placed
in
position.
NOTE:
PADLOCK SHACKLE
?IIICK,IVESSES
MUST
BE
FROM
I/+1,
TO
3/8,,
THE
SUG-
GESTED
rHrCr(iVESS IS
/tu!!.THIS
APPLIES
TO
DEVICES
FOR BOTH
AK AND
AKR
BRElKERS.
MAINTENANCE
A
periodic
maintenance schedule
must
be established
to
obtain
the best
service
from the
switchgear.
An
annual
check
and
overall
maintenance procedure
for
the switchgear
devices
and
all
connections
should be followed as
a mini-
mum
requirement. Equipment subject
to
highly
repetitive
operation
may
require more frequent maintenance.
A
permanent record
of
all
maintenance
work
should
be
kept. The
record should
include
a list of
periodic
checks
and
tests made,
the
date
they
were made,
the
condition
of
the equipment and
and
any
repairs -or
adjustments
that
were performed. Maintenance
employees
must follow all
recognized
safety
practices, such as those contained
in
the
National Electrical
Safety
Code
and
in
company or
other
safety regulations
during
maintenance.
WARNING: SOLID
INSU
LATIO]Y SURROUIVD-
ING AN
ENERGIZED CONDACTOR AND
POWER
APPARATUS
MUST NEVER
BE
RE-
LIED
UPON
TO
PROVIDE PROTECTION
TO
PERSOJVIVEL.
For
specific
information
regarding
the
maintenance of
devices, such
as
circuit
breakers,
relays,
meters, etc., refer
to
the
separate
instruction
book furnished
for
each
device.
BRE.AKER
AND
INSTRUMENT COMPARTMENTS
Breakers-Test
and inspect
all circuit
breakers
for
proper
operation as follows:
a.
Operate each breaker
while
in
the TEST
position
and
check
all
functions.
This is particularly important for
breakers
that
normally remain
in
either
the
opened
or
closed
positions
for
long
periods
of
time.
WARNING:
PRIMARY EQUIPMENT MAST
BE
COMPLETELY DEENERGIZED WHILE
BEING CONDUCTED. BE SURE
THAT ALL
/REAS OF
FEEDBACK
FROM
SECONDARY
CIRCUITS AS
WELL
/S
OUTS/DE
SOURCES
JRE
DISCONNECTED.
b.
Remove
the
breakers
from their
compartments
to
a
clean
maintenance
area.
Perform
the maintenance operation
suggested
in the
appropriate breaker
maintenance manual.
30
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