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9.1.10 Internal trip unit self-test on
the overcurrent tripping function
For commissioning and function testing.
Conditions
- Trip unit is activated by:
operating current
external 24 V DC voltage supply
- Current not in overload range
Indicators (page 9-9)
Internal circuit breaker self-test without tripping
Normal operation of the circuit breaker is not impaired
1
2
Running light
All indicators will light up one after other (from left to right or from top to bottom)
3
The flashing time corresponds to the long-time delay t
R
The flashing time deviates more than 10% from the set long-time
delay
t
R
4
The L-tripping indicator lights up
Te s t OK
T.U. ERROR indicator lights up
Te s t not OK
Te st not OK
Trip unit is defective, even if the L-tripping indicator lights up
5
- LED goes out after 30 sec.
- End of internal self-test
- Premature ending of test by
pressing CLEAR
6
Trip unit OK
Testing with handheld test device Handheld test device (page 9-99)
The test can be canceled
at any time by pressing CLEAR
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