ABB Relion 670 Series Commissioning Manual page 128

Section 11
Testing functionality by secondary injection
4. Decrease the voltage slowly and note the reset value.
5. Set and apply about 20% higher voltage than the measured operate value for one phase.
6. Measure the time delay for the TR1 signal and compare it with the set value.
7. Check the inverse time delay by injecting a voltage corresponding to 1.2 × U1>.
8. Repeat the test to check the inverse time characteristic at different over-voltage levels.
9. Repeat the above described steps for Step 2 of the function.
11.5.2.2 Extended testing
1. The tests above can be repeated for 2 out of 3 and for 3 out of 3 operation mode.
11.5.2.3 Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
11.5.3 Two step residual overvoltage protection ROV2PTOV
Prepare the IED for verification of settings outlined in Section
11.5.3.1 Function revision history
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11.5.3.2 Verifying the settings
1. Apply a single-phase voltage either to a single-phase voltage input or to a residual voltage
input with the start value below the set value U1>.
2. Slowly increase the value until ST1 appears.
3. Note the operate value and compare it with the set value.
4. Decrease the voltage slowly and note the reset value.
5. Set and apply a 20% higher voltage than the measured operate value for one phase.
6. Measure the time delay for the TR1 signal and compare it with the set value.
7. Check the inverse time delay by injecting a voltage corresponding to 1.2 × U1>.
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For example, if the inverse time curve A is selected, the trip signals TR1 and
TRIP operate after a time corresponding to the equation:
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Bay control REC670
Commissioning manual
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SEMOD54358-3 v7
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