OMICRON 239
Off-service diagnostic methods
3. In the Assessment area, configure the assessment.
► Click Edit configuration or click in the table to open the Assessment configuration dialog box,
and then edit the assessment limits.
► Select the Automatic assessment check box to enable the automatic assessment.
Note: For the assessment limit definitions, see 15.3 "Assessment limits" on page 107.
4. By using the Open breaker, Close breaker and Supply motor buttons in the Measurements area
of Primary Test Manager (see 11.1 "Test control commands" on page 85) you can check whether all
cables are correctly connected and bring the circuit breaker to the proper state. For testing the
minimum pickup by the open sequence the circuit breaker must be closed and vice versa.
5. In the Measurements area, select the measurement you want to perform, and then click Start.
The blue ring on the Start/Stop button is on.
6. Start the measurement by pressing the Start/Stop button.
The blue ring on the Start/Stop button flashes for approx. 3 seconds, and the lightning symbol in
Primary Test Manager and the red status light on the front panel are flashing.
Note: You can abort the measurement anytime manually by pressing the Emergency Stop button
or the Start/Stop button on the CIBANO 500 front panel.
Note: If you connect, for example, three coils of three phases in parallel not all might operate at the
same voltage. In this case the test will run until the last phase has operated and the highest voltage
(worst case) will be shown.
7. After the measurement has finished, the lightning symbol in Primary Test Manager stops flashing, the
green status light is on, and Primary Test Manager displays the measurement results.
In case of three different trip coils, the trip coils can trip at different voltages. After the last pole has tripped
the test will stop and show the worst case result.
Note: If there is an active discordance protection in place you must deactivate it for this test to avoid
tripping of the other phases due to the discordance protection instead of the minimum pickup test.
Disconnection
Do not disconnect the circuit breaker but leave it connected for performing the next test. For
disconnecting the circuit breaker, see "Disconnection" on page 245.
WARNING
Death or severe injury caused by high voltage or current possible
► Do not enter the dangerous area while testing with CIBANO 500 since any part of the circuit
breaker can carry dangerous voltages.
► Stay in the work area during the test.
Table 17-79: Minimum Pickup measurement data
Data Description
No. Number of the measurement
Operation Trip or close
V pickup Pickup voltage of the coil under test
Assessment Measurement assessment
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