6 – 9
6.7
Reclosing a circuit breaker tripped by the trip unit
NOTE
The reason for tripping can be displayed using the "QUERY" button on the trip unit. This is stored for at least two days, provided that the
trip unit was activated for at least 10 minutes before tripping.
1
Find reason for
tripping
2
Indicator
Overload in
main conductor
Overload in neutral
conductor
Short circuit:
short-time-delay trip
Short circuit:
instantaneous trip
Ground fault trip
3
Find and rem-
edy cause
- Check downstream load
- Check
trip unit
settings
- Inspect switchgear
- Check downstream load
4
Inspect circuit
breaker
Inspect contact system for possible damage
5
Clear trip cause
Summary of Contents for UL 1066
Page 56: ...7 5 7 2 Frame size II fused ...
Page 58: ...7 7 ...
Page 63: ...7 12 8 27 210 0 8 27 210 0 8 27 210 0 3 75 95 2 ...
Page 64: ...7 13 ...
Page 65: ...7 14 7 7 Frame size III fuse carriage ...
Page 66: ...7 15 ...
Page 69: ...7 18 7 9 External sensor for neutral conductor WLNCT2 ...
Page 70: ...7 19 WLNCT3 ...
Page 85: ...9 5 I tripping Ground fault tripping ...
Page 231: ...15 12 Pre assembling the locking module Installing 0767 1 2 3 4 6 5 ...
Page 232: ...15 13 1 Socket head cap screw M5 with washer and nut 7 8 Size 4 5 Nm 45 lb in ...
Page 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 ...
Page 298: ...23 16 6 7 8 9 5 2 1 Size 5 mm ...
Page 333: ......