Manual; Electrical; Maintenance; Inspection - GE AK-1-15 Instructions Manual

GEH-1807 Air Circuit Breakers Type AK-1-15 and AK-1-25
The breaker can be furnished with or without
a manual operating handle. Bre~rs which are
equipped with a pistol grip operating handle may be
closed by rotating the handle 90
0
in the clockwise
direction. Breakers which do not have a pistol
grip operating handle are closed by means of a
manual maintenance handle. The correct use of
the maintenance handle is shown in Fig. 2. Use of
the handle in an upside-down position can result in
damage to the breaker parts and should
be
avoided.
MANUAL
OPERATION
e
The breaker may be tripped manually by pushing
the manual trip button, which is located on the front
escutcheon or automatically by any of the trip
devices with which the breaker is equipped. The
breaker mechanism will automatically reset when
the breaker is tripped. The breaker is "trip free"
from the closing mechanism, which assures that it
cannot
be
closed as long as any trip device is
functioning.
If the escutcheon (9) Fig. 3 has been removed
from the breaker, the maintenance handle can no
longer be used. However, the breaker still may be
closed manually by inserting a screw driver in the
position shown in Figs. 5 and 5A, and then rotating
its handle upwards and towards the rear of the
breaker.
The breaker may be tripped manually by means
of the trip button or automatically by any of the trip
devices with which it is equipped.
ELECTRICAL
The breaker is closed electrically by means of
a push button, located on'the front of the breaker,
or by a remote switch. When the closing contact is
made the x contactor becomes energized, thereby
closing the x contacts and energizing the breaker
closing solenoid, which causes the breaker to close.
When the breaker closes, the prop switch causes the
breaker closing solenoid to be de-energized.
MAINTENANCE
CLOSING HANOLE
Fig.
2
Closing Breaker With Manual
Maintenance Handle
-
C It
-
$
-
MAINTENANCE
INSPECTION
BEFORE INSPECTION OR ANY MAINTE-
NANCE. WORK IS DONE, BE SURE THAT THE
BREAKER IS IN THE OPEN POSITION. ALL
ELECTRICAL POWER, BOTH PRIMARY AND CON-
TROL SOURCES, SHOULD ALSO BE DISCON-
NECTED.
Periodic inspection of the circuit breaker is
recommended at least once a year. More frequent
inspections are recommended, if severe load condi-
tions, dust, moisture, or other unfavorable condi-
tions exist.
If
the breaker remains open or closed for a
long period of time, it is recommended that
arrangements be made to open and close it several
times iil. succession, preferably under load.
At all times it is important not to permit pencil
lines, paint, oil or other foreign materials to remain
on the insulating surfaces of the breaker as they
may cause low resistance between points of different
potential and result in eventual electrical breakdown.
6
Always inspect the breaker after a short circuit
current has been interrupted.
At the time of periodic inspection, the following
checks should be made after the breaker has been
de-energized.
1. Manually operate the breaker several times,
A
check for obstructions or excessive friction.
V
2. Electrically operate the breaker' several
times to ascertain whether the electrical
attachments are functioning properly.
3. Arc quencher (See Section on "Arc
Quencher").
4. Contact condition, wipe, and pressure (See
Section on "Pole Unit Assembly").
5. Latch engagement (See Adjustments under
"Operating Mechanism").
6. Overload device tripping (See Adjustments ,
under "Series Overcurrent Tripping
Device").