GE Gerapid 2607 User Manual page 41

6.1.5 Inspection of contacts' tilt and gap
Pay attention to the warnings, Section 1!
A) Remove the arc chute and adapter
•
See 6.1.4-A/B.
B) Check the tilt of the main contacts
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[Fig. 45]. Use the hand lever for slowly closing the
main contacts.
•
[Fig. 46]. Once the arcing contact touches arc runner,
check the air gap between main contacts. The gap be-
tween main contacts shall have more than 1 mm
[0.04 in].
•
In case of insufficient tilt (gap), replace the arcing con-
tact with new one. See 6.2.1 and 6. 2.2 f or details.
•
If required gap is not av ailable, even after component
replacing, please c ontact GE Service Team.
C) Check the air gap of arcing contact
•
Close the breaker and secure the solenoid drive
against unintended opening. See 1.2.1.
•
[Fig. 47]. Check the air gap between the arcing con-
tact and main arm. It shall be minimum 1 mm
[0.04 in].
•
In case of insufficient gap, replace the arcing contact
with new one. See 6.2.1 and 6.2.2 f or details.
•
If required gap is not available, even after contact re-
placing, please contact GE Service Team.
D) Install back adapter and arc chute
•
See 6.1.4-G/H.
6.1.6 Inspection of the screw connections
Pay attention to the warnings, Section 1!
•
[Fig. 41]. Tighten front and backside of the arc runner
screw c onnections (3) and (5). Use torque of 10 Nm
[88 in-lbs].
•
[Fig. 41]. Tighten arc chute connections (4). Use torque
of 5 Nm [44 in-lbs].
•
[Fig. 41]. The arc runner's screw c onnections (3) must
be sec ured by means of lock washer.
•
[Fig. 41]. The arc chute's screw connections (4) must
be sec ured by means of flat washer.
•
Any other screws shall be tightening with applied
torques from Table 3-D.
•
Ensure that the screws are in good condition, that
thread and nest are not damaged. Surf ace shall be
free from rust. Replaced any screw, whic h does not
fulfill above conditions.
•
This check must be carried out prior to commissioning
and after maintenance.
6.1.7 Inspection of the mechanical components
Only GE Service Team or its representative shall perform
this inspection. These require major disassembly and ad-
justment of the breaker. Customer, without supervision of
trained specialist, shall not execute these.
2009-09-02 S47183e rev.03
Fig. 45 Closing operation by using hand lever
Fig. 46 Inspection of the main contacts' tilt
Fig. 47 Inspection of the arcing contact's air gap
Design and specifications are subject to change without notice
Air gap minimum 1 mm
Tilt (gap) minimum 1 mm
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