23 – 10
23.5
Checking contact erosion
It is strongly recommended that the breaker's internal contacts be inspected on a regular basis. Load breaking and short-circuit trips cause
contact erosion. The WL circuit breaker is equipped with a contact erosion indicator for monitoring wear of the circuit breaker's internal
contacts.
- OPEN circuit breaker the circuit breaker and discharge the closing spring
- Move the circuit breaker into the withdrawn position in the cradle
- Manually charge the closing spring
- Close the circuit breaker
- Remove the arc chutes
View with the circuit breaker closed
(1)
Indicator pin
(2)
Indicator pin is visible in the big recess
(3)
Indicator pin is no longer visible
(4)
Arcing tip
(5)
Arc Chamber
If the indicator pin is no longer visible, the contact system must be replaced.
The contact system must also be replaced if:
- the end of the circuit breaker's mechanical service life according to its technical data has been reached (due to wear on the copper
braids).
- heavy wear of the arcing tip is visible
(triangular tips have lost approx. 5/16“ of their original length)
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.
Will cause serious personal injury.
Do not place hands or objects within the arc chamber.
0071-1
(5)
(1)
(2)
(3)
(4)
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: ......