GE Gerapid 2607 User Manual page 38

6. Inspections and maintenance
6.1 List of inspections
TYPE OF THE INSPECTION
A. General visual inspec-
tion
B. General functional in-
spection
C. Inspection of the arc
chute and contact system
D. Inspection of the
screw/bolt connections
E. Inspection of the me-
chanic c omponents
Required tools:
Cleaning tissue; abrasive paper; manual closing lever; hexagon wrenc hes SW 5, SW6; T orx® wrenches size 30, 40, 45; small
and medium screwdrivers; ratchet with 10 mm hex c ap; pliers; tongs.
Dispose of the breakers if required:
Pay attention to the national and loc al regulations of disposal!
38
BY WHOM HOW OFTEN
-Customer Every 6-12 months
-Trained technician
-Customer Every 6-12 months
-Trained technician
-Customer Every 6-12 months
or after:
-Trained technician
•
•
•
It is recommend to c arry out
inspection of c ontact system
after breaking of equiv alent
of 150MA
energy.
-Customer Every 6-12 months
or after every inspection:
-Trained technician
•
•
•
-GE Every 5 years
or
-Service technician
After 5.000 openings
Design and specifications are subject to change without notice
high short circuit open-
ing at >25 kA
>300 openings at load
current
>100 openings at over
current load (2-3 x In)
2
s total let through
of the arc runners
of the contacts
of the arc chute
WHAT TO DO/CHECK
•
Check for damages or cracks of the
frame, adapter or arc c hute
•
Check for missing screws or caps
•
Check for damaged labels
•
Check for corrosion
•
Check for distinct manif estations of
flame or smoke at the f rame
•
Clean the breaker from dirt and dust
•
Clean and degrease the copper termi-
nals
•
Manually close and open the breaker to
check the drive and mec hanism
•
Close the breaker electrically and open
by trip unit(s) releasing, to check con-
trols
•
Check for wear of the arc runners; shall
not exceed 30 % of its cross section
•
Check for wear of the pre-arcing con-
tact. It shall not exceed 2 mm [0.08 in].
•
Check for wear of the main c ontacts at
fixed and flexible sides; shall not exceed
1.5 mm [0.06 in] of its depth.
•
Check for wear of the arc c hute plates;
check for deposits inside of arc c hute,
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.
Check the position of the c ountersunk
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 switc h
•
Check out upper dumper of the mecha-
nism; no cracks, deformation or heavy
discoloration; hard consistency; without
punctures
•
Check out main flexband break age;
shall not exceed 30 % of its cross sec-
tion
•
Check out wear of mini flexband; shall
not exceed 30 % of its cross section
•
Clean and degrease UVR latch and
quick latc h of the mechanism. A pply
dash of Beacon EP2 grease af terwards.
S47183e rev.03 2009-09-02