Verifying The Settings; Completing The Test; Two Step Residual Overvoltage Protection Rov2Ptov - ABB RET670 Installation And Commissioning Manual

1MRK 504 088-UEN C
13.7.2.1
13.7.2.2
13.7.3
13.7.3.1
13.7.3.2
Installation and commissioning manual

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.

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.

Two step residual overvoltage protection ROV2PTOV

Prepare the IED for verification of settings as outlined in section
section "Preparing for test"
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.
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.
Verifying settings by secondary injection
in this chapter.
Section 13
"Overview" and
157