Completing The Test; Voltage Differential Protection Vdcptov; Check Of Undervoltage Levels - ABB REG670 2.0 IEC Commissioning Manual

1MRK502053-UEN B
12.6.4.2
12.6.5
12.6.5.1
Generator protection REG670 2.0 IEC
Commissioning manual
Testing functionality by secondary injection
11. Check that trip and alarm contacts operate according to the configuration logic.
12. Set the cooling time constant temporarily to min value (1min.) to quickly lower
the thermal content.
13. Wait for a period equal to 6 times Tcooling switch 20 minutes on a voltage 1.15 ·
V/Hz> and check the inverse operate time.
Wait until the thermal memory is emptied, set the cooling time constant
according to the setting plan and check another point on the inverse time curve
injecting a voltage 1.3 · V/Hz>.
14. Finally check that START and TRIP information is stored in the event menu.

Completing the test

Continue to test another function or end the test by changing the TestMode setting to
Off. Restore connections and settings to their original values, if they were changed for
testing purposes.

Voltage differential protection VDCPTOV

Prepare the IED for verification of settings as outlined in section
section "Preparing for test"

Check of undervoltage levels

This test is relevant if the setting BlkDiffAtULow = Yes.
Check of U1Low
Procedure
1. Connect voltages to the IED according to valid connection diagram and figure
47.
2. Apply voltage higher than the highest set value of UDTrip, U1Low and U2Low
to the U1 three-phase inputs and to one phase of the U2 inputs according to
figure 47.
The voltage differential START signal is set.
in this chapter.
Section 12
"Requirements" and
181