GE AKD-6 - Breaker and Instrument Compartment Checks; Rackout Mechanism Padlock Devices; Padlock Device for AK Breakers; Padlock Device for AKR Breakers

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