13.7.2.1 Verifying the settings
Procedure
1.
Apply single-phase voltage below the set value U1>.
2. Slowly increase the voltage until the ST1 signal appears.
3. Note the operate value and compare it with the set value.
4. Switch the applied voltage off.
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. Repeat the test for step
2.
13.7.2.2
Completing the test
Continue to test another function or end the test by changing the Test mode setting
to Off. Restore connections and settings to their original values, if they were
changed for testing purposes.
13.7.3 Two step residual overvoltage protection ROV2PTOV
Prepare the IED for verification of settings as outlined in section
"Overview" and
section "Preparing for test" in this chapter.
13.7.3.1
Verifying the settings
1. Apply the 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. Switch the applied voltage off.
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. Repeat the test for step
2.
13.7.3.2 Completing the test
Continue to test another function or end the test by changing the Test mode setting
to Off. Restore connections and settings to their original values, if they were
changed for testing purposes.
1MRK 504 088-UEN C Section 13
Verifying settings by secondary injection
157
Installation and commissioning manual
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