Installation and Operation
of
Type
AK
Power Circuit
Breakers
GEK-7302
MAINTENANCE INSTRUCTIONS
INSPECTION
BEFORE INSPECTION OR
ANY
MAIN-
TENANCE WORK
IS
DONE, BE SURE THAT
THE BREAKER
IS
IN
THE OPEN POSI-
TION ALL ELECTRICAL POWER, BOTH
PRIMARY
AND
CONTROL SOURCES
SHOULD ALSO BE DISCONNECTED,
Periodic
inspection
of the
circuit
breaker
is recoinmended at
least
once a
year.
More frequent inspections
are
recom-
mended,
if
severe
load conditions, dust,
moisture,
or
other unfavorable conditions
exist.
Always inspect the
breaker
after a
short
circuit
current
has been interrupted,
At
the time
of
inspection, the following
checks
should be made
after
the
breaker
has
been
de~
energized.
1. Manually
operate
the
breaker
several
times, checking
~or
obstructions
or
excessive friction.
2,
Electrically
ope'rate the
breaker
several
times
(if
breaker
has
electrical
control)
to
ascertain whetl)er the
electrical
attachments
are
functioning properly.
3, Remove the
arc
quenchers
by
re
..
moving the channel shaped retaining
bar.
" . '
4. Inspect
arc
quenchers and contacts
for breakage
or
excessive burning.
Should
arc
quencher
barriers
or
contacts
be eroded to half
their
original thickness
they should be replaced.
LUBRICATION
In
general, the circuit breakel'
re-
quires moderate lumbrication. Bearing
points and sliding
surfaces
should be lub-
ricated at the regular inspection periods
wi,th
a thin film
of
GE
Lubricant D60Hl6,
Before lubricating remove
any
hardened
grease
and
dirt from latch
and
bearing
surfaces with kerosene.
ALL,
EXCESS
LUBRICANT
WHOULD
BE REMOVED WITH
A CLEAN CLOTH
TO
AVOID
ANY
AC-
CUMULATION OF DORT OR DUS'I'.
On
drawout break:ers, the contact
sur~
face
of
the disconnect studs should be
cleaned
and
greased with
GE
Grease Specifi-
cation
D60H4'7.
These instructions have as
their
pur-
pose the imparting
of
information
of
a
general nature concerning the installation
and·
operation
of
Type
AK
power circuit
breakers.
If
more complete
and
specific
information is required such as might
be
needed for overhauling the
breaker,
trouble
shorting,
or
replacing
parts
of
the break.er,
refer
to
the complete instruction for the
particular breaker type involved. These
are:
Maintenance
Manual
GEI-50299
GEI-93663
GEK-7303
GEK-730!
GEK-7310
Breaker
Type
AK-2/2A/3/3A-15125,
AK
U-2/2A/3/3A-25
AKF-2/2A-25
AK-2/2A/fl3A-50/75/lOO,
AKU-2/2A
3/3A-50
AK-2/2A/
/3A-50S/75S/
JOOS,
AKF-2C/2D/2E
Power Sensor Solid State
Test
Instructions
AK/
AKU-4/5-50/508
GEK··7309
'fest
Instructions for
In~
stallation
or
service
of
Power Sensor Equipped
AK
breakers
Renewal
parts
bulletins for the various
types
of
breakers
are:
~
Breaker Type
GEF'-4149
AK-2-15/25
GE:F-4150
AK-2-50
GEF-4395
AK-2/2A/3/3A-75
GEF-4396
AK-2/2A/3/3A-l00
GEF-4527
AK-4/5-50
9
Courtesy of NationalSwitchgear.com
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