GE Gerapid 2607 User Manual page 42

6.2 List of maintenance works
TYPE OF THE WORK
A. Arc chute c hanging
B. Arcing contact and arc
runners changing
C. Protective walls chang-
ing
D. Adjustment of the con-
tacts
E. Replacement of the
control board
F. Adjustment of the
mechanism
G. Flexband or fixed con-
tact changing
H. Mechanism c hanging
I. Dumper(s) changing
J. Trip unit changing &
adjustment
K. Auxiliary contacts ad-
justment and changing
L. Drive changing
M. Accessories c hanging
Table 4
Required tools:
•
Cleaning tissue
•
Pocket lamp
•
Hand lever
•
Hexagon wrenc h SW 4, SW 5, SW 6
•
Screw wrench SW 10, SW 13
•
Torx® wrench size 30, 40 and 45
•
Small and medium screwdriver
•
Pliers
•
Wire cutter
•
File
•
Steel brush
Safety hints:
Securing against falling parts
Hint 1 Place a cloth into the lower area of the arcing
contact [Fig. a]. Remember to secure the closing drive
according to Hint 3.
Fig. a Protecting of the arcing area against falling parts
2009-09-02 S47183e rev.03
BY WHOM WHEN REQUIRED
-Customer As a result of the
-Trained technician inspection C
-Customer As a result of the
-Trained technician inspection C
-Customer As a result of the
-Trained technician inspection C
-GE Service Engr As a result of the
inspection C
-Customer As a result of the
-Trained technician inspection B,E
-GE Service Engr As a result of the
inspection B,E
-GE Service Engr As a result of the
inspection C,E
-GE Service Engr As a result of the
inspection B,E
-GE Service Engr As a result of the
inspection E
-GE Service Engr As a result of the
inspection B,E
-Customer As a result of the
-Trained technician inspection B,E
-GE Service Engr As a result of the
inspection B,E
-GE Service Engr As a result of the
inspection B,E
Design and specifications are subject to change without notice
RECOMMENDATIONS
Replace complete arcing set.
Only when replacement of the arcing contact re-
sults with incorrect gaps. See point 6.1.5.
Replace upper and lower dumper at the same
time.
In case of improper operation of the switches, ad-
justment might be necessary.
Maintenance with zero voltage release
Hint 2 If an optional zero voltage release is in-
stalled, it must be energized to enable closing of the
breaker. Only then maintenance of the arcing c on-
tacts is possible.
Hint 3 To prevent the risk of injury, it is recom-
mended to secure the breaker in the closed position
with a simple mec hanical interlock device [Fig. b]. A
piece of tubing having ~50 mm [~2 in] length and in-
ner diameter of minimum 14 mm [0,55 in] works well.
The outer diameter of the locking rod shall be less
8 mm [0,3 in]. GE does not offer this locking device.
drive
Closing
Secure tube
Locking rod
Fig. b Securing closing drive against opening
42