Inspectio N And Maintenance; Renewal Parts - GE AKR-30 Series Maintenance Manual

SECTION 1 -lntroduction
These i nstructions provide the mai ntenance procedures
and describe the operation of the
size type AKA low voltage power circuit breakers listed i n
Table
1 .
The proper use, care , and mai ntenance of these break­
ers is a prime safety consideration for the protection of
person nel , as well as a means of minimizing equipment
damage when faults occur. Persons who apply, use , and
service these breakers will acquire the k nowledge they
need by gaining the i nformation contained i n these instruc­
tions.

INSPECTIO N AND MAINTENANCE

1 . 1
Breakers should be cared for under a systematic main­
te nance prog ram. Taking each breaker out of service
pe riodically for inspection and mai ntenance is an excellent
means of establishing high service reliability. It is good
policy to have one or more spare breakers to i nstall in place
of breakers requiring maintenance. Keeping a stock of
reco m mended renewal parts will insure that maintenance
work can be done quickly.
How frequently an ind ividual breaker should be in­
spected will depend on the circumstances of its use. It
would be well to i nspect any breaker at least once a year. If
it is frequently operated, operated under severe load condi­
tions, or i nstalled i n an area of high humidity or a dusty ,
dirty atmosphere, inspections should be more often. I n ­
spections m ight be monthly under adverse conditions.
Always i nspect the breaker after a short-ci rcuit current
has been i nterru pted .
SAFETY P RE CAUTION
BEFORE INSPECTING OR B EGINNING ANY
MAINTENANCE WORK ON THE BREAKER, I T
MUST BE DISCONNECTED FROM A L L VOL T­
A G E S O UR CES, B O TH P O WER AND CON­
TROL, AND BE IN THE "OPEN" POSITION.
4
thru amp frame
800 2000
A basic i nspection should consist of the following :
a. Visual Check - Look for dirt, grease or other foreign
material on any breaker parts. Check insulati ng surfaces
for conditions that could degrade i nsulati ng properties
(cracks, overheating, etc . ) . Also check for loose hardware
and components on the bottom of the b reaker compart­
ment. Loose or damaged control wiring and similar
problem areas should also be checked .
b. Operation - Observe a few close-open operations
using the operating or maintenance handle. If a breaker is
seldom operated such that it remains open or closed for a
period of six months or more, it is recommended that it be
opened and closed several times i n succession.
c. I nterlocks - During the O perational check verify the
safety i nterlocks are properly working.
d . Arc Chutes and Contacts - I nspect the condition of
the arc chutes and contacts. Look for excessive burning or
breakage. Check the amount of contact depression or
wipe when the breaker is closed.
e . Accessories - Verify that the various accessories are
working properly.
f. The performance of the solid-state current trip devices
may be checked with a suitable test set . Check elec­
tromechanical devices for positive trip in accordance with
the instructions in their Maintenance Manual, G E l
R E N EWAL PARTS
1 .2
The AKA breakers contain a variety of parts and as­
semblies. Many of these are available as replacement
parts when the need arises. See publication G E F
Renewal Parts, for a complete listing of these parts.
86 1 57.
4527,