1 general visual inspection, 2 general functional inspection, Pay attention to the warnings, section 1 – GE Industrial Solutions GERAPID 8007R, 10007R WITH ARC CHUTES 1X2, 1X3 User Manual
Page 30: Fig. 26 using of the hand lever for manual closing, Fig. 27 using of the hand lever for manual opening, 3 inspection of the arc chute, A) remove the arc chute, B) check the arc chute, C) install the arc chute, Fig. 28 arc chute and arc probes fixing
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Switch the breaker ON and OFF several times. The
contacts must close after the ON command, and the
contacts must open following the OFF command via the
shunt trip or the zero voltage release.
6.1.1 General visual inspection
•
Check for damages or cracks of the frame, the adapter
or the arc chute.
•
The breaker mechanism must not appear sluggish nor
must ON/OFF be unduly delayed.
•
Check the black marks on the countersunk screws. These
marks shall be aligned together. If any screw is
loosening, shall be replaced with new one, using Loctite
222. Afterwards, mark the screw with black line to sign
its position in nest.
•
Check for missing screws or caps.
•
Check for damaged labels. Clean and repair.
•
Check for corrosion. In case of significant corrosion,
please contact GE representative for assistance.
•
Check for distinct manifestations of flame or smoke on
the frame. Especially in lower area of the breaker. Please
document and contact GE representative for assistance.
•
Clean the breaker of dirt and dust. Remove all dirt with a
dry cloth. No excessive signs of abrasion (rough chips)
should be visible anywhere.
Fig. 27 Using of the hand lever for manual opening.
6.1.3 Inspection of the arc chute
•
Clean and degrease the copper terminals, if necessary.
Pay attention to the warnings, Section 1!
A) Remove the arc chute
6.1.2 General functional inspection
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[Fig. 28]. Take off isolation caps (6). Loosen the clamping
screws (3) and (4), using SW5 hexagon wrench and lift off
the arc chute (1) from the adapter (2).
Pay attention to the warnings, Section 1!
•
In order to check the latch mechanism, the breaker can
be opened and closed with a hand lever.
B) Check the arc chute
•
[Fig. 29]. Check the arc chute’s interior, as far as possible,
for presence of many copper pearls on the chute’s plates
(1) that could partially link the plates.
•
[Fig. 29]. Check the general condition of the insulation
plates (4). These shall not be bent or burned. Also other
insulation shall not be heavily damaged.
•
[Fig. 29]. Check the arc horns (2). The cross section shall
not be reduced more than ~30 %.
•
[Fig. 29] Check the splitting plates (3). These shall not be
burned more than ~20 mm [~0.8 in].
C) Install the arc chute
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[Fig. 28]. Put arc chute (1) into adapter (2).
•
[Fig. 28]. Tighten front and backside connections of the
arc probes (3), including lock washer. Use a torque of 10
Nm [88 in-lbs].
•
[Fig. 28]. Tighten backside of the arc chute connections
(4), use flat washers. Use a torque of 5 Nm [44 in-lbs].
•
[Fig. 28]. Put on isolation caps (6).
Fig. 26 Using of the hand lever for manual closing.
4
1
3
2
6
Fig. 28 Arc chute and arc probes fixing.
30
Design and specifications are subject to change without notice
DTR01807 rev.02 2010-02-16