GE Industrial Solutions GERAPID 8007R, 10007R WITH ARC CHUTES 1X2, 1X3 - Manual (Page 29)

2010-02-16 DTR01807 rev.02 Design and specifications are subject to change without notice 29
6. Inspections and maintenance
6.1 List of inspections
TYPE OF THE
INSPECTION
BY WHOM HOW OFTEN WHAT TO DO/CHECK
A. General visual
inspection
-Customer
-Trained technician
At least once a year. • 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
B. General functional
inspection -Customer
-Trained technician At least once a year. • 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
• Check the blockade of POCT
C. Inspection of the arc
chute and contact
system
-Customer
-Trained technician After:
•
high short circuit
opening over 25 kA
• 300 openings at load
current or frequent
overload switching.
At least once a year.
• Check for wear of the arc probes; shall not
exceed 30 % of its cross section
• Check for wear of the pre-arcing contact.
It shall not exceed 2 mm [0.08 in].
• Check for wear of the main contacts at
fixed and flexible sides; shall not exceed
1.5 mm [0.06 in] of its depth.
• Check for wear of the arc chute plates;
check for deposits inside of arc chute, this
area shall be free of deposits.
• Check for wear of protective walls; shall
not exceed 1 mm [0.04 in].
• Check for contact tilt and gaps.
D. Inspection of the
screw/bolt connections
-Customer
-Trained technician
After every inspection:
• of the arc probes
• of the contacts
• of the arc chute
At least once a year.
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]
E. Inspection of the
mechanic components -GE
-Service technician After 5.000 openings
At least once every 4
years
• 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; metric hex (Allen) wrenches SW5, SW6; Torx® wrenches size T30,T 40, T45;
small and medium screwdrivers; ratchet with 10 mm hex socket; pliers; tongs.
Dispose of the breakers if required:
Pay attention to the national and local regulations of disposal!