GE Consumer & Industrial - G E Power Controls

6. Inspections and maintenance
6.1 List of inspections
TYPE OF THE
INSPECTION
A. General visual
inspection
B. General functional
inspection
C. Inspection of the arc
chute and contact
system
D. Inspection of the
screw/bolt connections
E. Inspection of the
mechanic components
BY WHOM HOW OFTEN WHAT TO DO/CHECK
-Customer
-Trained technician
-Customer
-Trained technician
-Customer
-Trained technician
-Customer
-Trained technician
-GE
-Service technician
Every 6-12 months Check for damages or cracks of the
frame, adapter or arc chute
Check for missing screws or caps
Check for damaged labels
Check for corrosion
Check for distinct manifestations of flame
or smoke at the frame
Clean the breaker from dirt and dust
Clean and degrease the copper terminals
Every 6-12 months Manually close and open the breaker to
check the drive and mechanism
Close the breaker electrically and open by
trip unit(s) releasing, to check controls
Every 6-12 months
Check for wear of the arc runners; shall
or after:
not exceed 30 % of its cross section
high short circuit Check for wear of the pre-arcing contact.
opening at >25 kA
It shall not exceed 2 mm [0.08 in].
>300 openings at load Check for wear of the main contacts at
current
fixed and flexible sides; shall not exceed
>100 openings at over 1.5 mm [0.06 in] of its depth.
current load (2-3 x In) Check for wear of the arc chute plates;
check for deposits inside of arc chute, this
area shall be free of deposits.
It is recommend to carry
out inspection of contact
system after breaking of
equivalent of 150MA 2 s total
let through energy.
Every 6-12 months
or after every inspection:
of the arc runners
of the contacts
of the arc chute
Every 5 years
or
After 5.000 openings
Check for wear of protective walls; shall
not exceed 1 mm [0.04 in].
Check for contact tilt and gaps.
Check the position of the countersunk screws
in the sidewalls.
Check for tightness or use torque tool (torque
in SI and Imperial units):
M8 ~20 Nm [~ 177 in-lbs]
M6 ~10 Nm [~ 88 in-lbs]
M5 ~5 Nm [~ 44 in-lbs]
M4 ~3 Nm [~ 26 in-lbs]
Carry out inspection “B” above
Check out settings of the main contacts
and auxiliary switch
Check out upper dumper of the
mechanism; no cracks, deformation or
heavy discoloration; hard consistency;
without punctures
Check out main flexband breakage; shall
not exceed 30 % of its cross section
Check out wear of mini flexband; shall not
exceed 30 % of its cross section
Clean and degrease UVR latch and quick
latch of the mechanism. Apply dash of
Beacon EP2 grease afterwards.
Required tools:
Cleaning tissue; abrasive paper; manual closing lever; hexagon wrenches SW5, SW6; Torx® wrenches size 30, 40, 45; small and
medium screwdrivers; ratchet with 10 mm hex cap; pliers; tongs.
Dispose of the breakers if required:
Pay attention to the national and local regulations of disposal!
38 Design and specifications are subject to change without notice S47183R01E06 2012-11-21