GE Industrial Solutions GERAPID 2508, 4008, 5008, 6008 WITH ARC CHUTE 1X2 - Manual (Page 44)

44 Design and specifications are subject to change without notice S47183De rev.02 2011-03-14
6.1.1 General visual inspection
 Check out for damages or cracks of the frame, the adapter
or the arc chute.
 Check out 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 out for missing screws or caps.
 Check out for damaged labels. Clean and repair.
 Check out for corrosion. In case of significant corrosion,
please contact GE representative for assistance.
 Check out for distinct manifestations of flame or smoke at
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 particularly high signs of abrasion (rough
chips) should be visible anywhere.
 Clean and degrease the copper terminals.
6.1.2 General functional inspection
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.
Fig. 40 Using of the hand lever
 Re-energize the control circuits and switch the breaker ON
and OFF several times using ST or UVR, and using closing
drive. The contacts must close after the CLOSE command
and must open following the OPEN command
 The breaker mechanism must not appear sluggish nor
must ON/OFF be unduly delayed.
6.1.3 Inspection of the arc chute
Pay attention to the warnings, Section 1!
A) Remove the arc chute
 [Fig. 41]. Remove front and rear arc runner protection caps
(1) by sliding up and out.
 [Fig. 41]. Using SW5 hex wrench, remove front and rear arc
runner screws (2). Remove the six arc chute attachment
screws (3) from front, rear and sides of the adapter (4). Lift
arc chute (5) up and out of the adapter.
B) Check the arc chute
 [Fig. 42]. Check the arc chute’s interior, as far as possible,
for deposits (1). There should be no copper pearls on the
metal-plates, which could partially short the plates.
 [Fig. 42]. 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. 42]. Check the arc horns (2). The cross section shall not
be reduced more than ~30 %.
 [Fig. 42] Check the splitting plates (3). These shall not be
burned more than ~20 mm [~0,8 in].
C) Install the arc chute
 [Fig. 41]. Put arc chute (5) into adapter (4).
 [Fig. 41]. Tighten front and backside connections of the arc
runners (2), including lock washer. Use a torque of 10 Nm [88
in-lbs].
 [Fig. 41]. Tighten front, rear and side of the arc chute
connections (3), including flat washers. Use a torque of 5 Nm
[44 in-lbs].
 [Fig. 41]. Put on isolation caps (1).
Fig. 41 Removing the arc chute
2
1 3
5
4
3