Siemens UL 489 Operating Instructions Manual page 154

Circuit breaker may trip.
If the trip settings are changed while the breaker is closed (and under load) the breaker may trip.
Adjust parameters only when the circuit breaker is in the open position.
Internal circuit breaker self-test with tripping
T
he test can be canceled
at any time by pressing CLEAR
1
Press and hold CLEAR
2
3
The flashing time corresponds to the long-time delay
Circuit breaker trips
4
Test OK
q Reclosing a circuit breaker trip-
5
ped by the trip unit (page 6-9)
9 – 52
1
Press and hold TEST
All indicators will light up one after other (from left to right or from top to bottom)
t
R
Circuit breaker does not trip
Test not OK
Test with handheld test device
- Check wiring between trip unit and tripping coil
- Test tripping coil
NOTICE
2
Running light
The flashing time deviates more than 10% from the set long-time
delay t
R
Test not OK
Trip unit is defective, even if the circuit breaker trips
3
0075-01-02
Release both buttons at the same time