Reclosing A Circuit Breaker Tripped By The Trip Unit - Siemens UL 1066 Operating Instructions Manual

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
Overload in
Indicator
main conductor
- Check downstream load
- Check trip unit
3
Find and rem-
edy cause
4
Inspect circuit
breaker
5
Clear trip cause
6 – 9
Overload in neutral
conductor
settings
Short circuit: Short circuit:
short-time-delay trip instantaneous trip
- Inspect switchgear
- Check downstream load
Inspect contact system for possible damage

Maintenance (page 23-1)
Ground fault trip