GE Industrial Solutions GERAPID 2607, 4207, 6007, 8007 with arc chutes 1X2, 1X4, 2X2, 2X3, 2X4 - Manual (Page 38)

38 Design and specifications are subject to change without notice S47183e rev.03 2010-06-07
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
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
B. General functional
inspection -Customer
-Trained technician 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
C. Inspection of the arc
chute and contact
system
-Customer
-Trained technician Every 6-12 months
or after:
• high short circuit
opening at >25 kA
• >300 openings at load
current
• >100 openings at over
current load (2-3 x In)
It is recommend to carry
out inspection of contact
system after breaking of
equivalent of 150MA 2 s total
let through energy.
• Check for wear of the arc runners; 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 Every 6-12 months
or after every inspection:
• of the arc runners
• of the contacts
• of the arc chute
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
Every 5 years
or
After 5.000 openings
• 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!