23 – 11
23.6
Replacing the circuit breaker internal
contact assemblies
If the circuit breaker's internal contacts need to be replaced following an inspection, this can be done using the following procedure.
When replacing the circuit breaker's internal contacts, it is recommended that all three poles be replaced at the same time. It is also required
that the arc chutes be replaced when the breaker internal contacts be replaced at the same time. See
Checking arc chutes (page 23-5)
for
replacement arc chutes.
-
OPEN the circuit breaker and discharge the closing spring
-
Remove the circuit breaker from the cradle
DANGER
Hazardous voltage.
Will cause death, serious personal injury, or equipment damage.
Turn off and lock out all power supplying this device before working on this device.
WARNING
High speed moving parts.
Can cause serious personal injury.
Discharge the closing spring before inspection and before carrying out any work on the circuit breaker.
NOTE
Pole assemblies are not field-replaceable for frame size III, M-class circuit breakers.
Содержание UL 1066
Страница 43: ...6 12 7 Reset reclosing lockout 8 Charge closing spring 9 Switch ON Frame size II Frame size III 9X ...
Страница 56: ...7 5 7 2 Frame size II fused ...
Страница 58: ...7 7 ...
Страница 63: ...7 12 8 27 210 0 8 27 210 0 8 27 210 0 3 75 95 2 ...
Страница 64: ...7 13 ...
Страница 65: ...7 14 7 7 Frame size III fuse carriage ...
Страница 66: ...7 15 ...
Страница 69: ...7 18 7 9 External sensor for neutral conductor WLNCT2 ...
Страница 70: ...7 19 WLNCT3 ...
Страница 85: ...9 5 I tripping Ground fault tripping ...
Страница 231: ...15 12 Pre assembling the locking module Installing 0767 1 2 3 4 6 5 ...
Страница 232: ...15 13 1 Socket head cap screw M5 with washer and nut 7 8 Size 4 5 Nm 45 lb in ...
Страница 271: ...19 10 Function check Then Fit back front panel and side cover on the right if it was removed page 23 4 10 ...
Страница 280: ...21 2 Installing the door sealing frame Not for use with fuse carriages Catalog No Door sealing frame WLDSF 1 2 3 NOTICE ...
Страница 289: ...23 7 23 3 3 Installing arc chutes 1 2 6 5 PH 2 0043 02 3 4 5 6 For frame size III 3 PH 2 ...
Страница 298: ...23 16 6 7 8 9 5 2 1 Size 5 mm ...
Страница 333: ......