GE Gerapid 2607 User Manual page 43

6.2.1 Maintenance of contact system (after 11/2003)
Pay attention to the warnings, Section 1!
This section is valid for breakers manufactured
after 11/2003.
This section refers to maintenance works A, B, C from
Table 4.
A) Remove the arc chute
•
[Fig. 49]. Loosen the sc rews (3) and (4), using SW5
hexagon wrenc h and take off the arch c hute (1) f rom
the adapter (2).
B) Remove the arc chute adapter
•
[Fig. 48]. To dismantle the arc chute adapter, loosen
and pull out the four upright screws (1) using SW5 tool.
Pay attention that no screws or washers fall inside the
breaker!
•
[Fig. 48]. Draw aside and lift off both parings of
adapter (2). Then pull out two protective walls (3).
C) Changing the protective walls, arc runners and arcing
contacts
•
[Fig. 48]. Pull out two protective walls (3).
•
[Fig. 50]. Loosen screws (6a) with tool (SW4) and take
out f ront wall (6).
•
[Fig. 50]. Loosen screw (5a) with tool (SW5) and take
out the f ront arc runner (5).
•
[Fig. 50]. Take out the back arc runner (4) by loosening
two screws (4a) with tool (SW5). Don't remove the pro-
tective cap (4b).
•
[Fig. 50]. Loosen and take out screw (7) including lock-
ing plate (8). Don't split up sc rew and locking plate!
•
[Fig. 50]. Pull out axis pin (9). Pull out arcing contact
(10) and put in new arcing contact.
•
[Fig. 50]. Put in axis pin (9) and protect it by the locking
plate (8). Tighten screw (7) with torque of 10 Nm [88 in-
lbs].
•
[Fig. 50]. Install front-arc runner (5) and back-arc run-
ner (4). Tighten it using torque of 10 Nm [88 in-lbs].
•
[Fig. 50]. Install front wall (6) and adjust it by position-
ing the protective wall. Tighten with torque of 10 Nm
[88 in-lbs].
•
[Fig. 48]. Put in two protective walls (3).
D) Install the adapter
•
[Fig. 48]. Install two protective walls (3). Use new ones
if necessary. Install two parings of adapter (2) and
tighten screws (1); use 5 Nm [44 in-lbs].
E) Install the arc chute
•
[Fig. 49]. Put in arc chute (1) into adapter (2).
•
[Fig. 49]. Tighten front- and backside connections of
the arc runners (3), including lock washer; use 10 Nm
[88 in-lbs].
•
[Fig. 49]. Tighten f ront- and backside of the arc c hute
connections (4), including flat washers; use 5 Nm
[44 in-lbs].
2009-09-02 S47183e rev.03
Fig. 48 Adapter and protective w alls
Fig. 49 Arc chute and arc runners fixing
Design and specifications are subject to change without notice
3
1
2
1
2
4
3
5
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