5 inspection of contacts’ tilt and gap, Pay attention to the warnings, section 1, A) remove the arc chute and adapter – GE Industrial Solutions GERAPID 2607, 4207, 6007, 8007 with arc chutes 1X2, 1X4, 2X2, 2X3, 2X4 User Manual
Page 41: B) check the tilt of the main contacts, C) check the air gap of arcing contact, D) install back adapter and arc chute, 6 inspection of the screw connections, 7 inspection of the mechanical components, Fig. 45 closing operation by using hand lever, Fig. 46 inspection of the main contacts’ tilt
2010-06-07 S47183e rev.03
Design and specifications are subject to change without notice
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
•
[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
between main contacts shall have more than 1 mm
[0.04 in].
•
In case of insufficient tilt (gap), replace the arcing contact
with new one. See 6.2.1 and 6.2.2 for details.
•
If required gap is not available, even after component
replacing, please contact 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 contact
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 for details.
•
If required gap is not available, even after contact
replacing, 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 connections (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 connections (3) must be
secured by means of lock washer.
•
[Fig. 41]. The arc chute’s screw connections (4) must be
secured 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. Surface shall be free
from rust. Replaced any screw, which 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 adjustment
of the breaker. Customer, without supervision of trained
specialist, shall not execute these.
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