Verifying The Setting; Completing The Test; Two Step Overvoltage Protection Ov2Ptov - ABB Relion 650 Series Commissioning Manual

1MRK 504 109-UEN -
5.5.1.1
5.5.1.2
5.5.2
RET650
Commissioning Manual

Verifying the setting

Verification of START-value and time delay to operate for Step1
Procedure
1. Check that the IED settings are appropriate, especially the START-value, the
definite time delay and the 1 out of 3 operation mode.
2. Supply the IED with three-phase voltages at their rated values.
3. Slowly decrease the voltage in one of the phases, until the START signal
appears.
4. Note the operate value and compare it with the set value.
5. Increase the measured voltage to rated load conditions.
6. Check that the START signal resets.
7. Instantaneously decrease the voltage in one-phase to a value about 20% lower
than the measured operate value.
8. Measure the time delay for the TRIP signal, and compare it with the set value.
Extended testing
Procedure
1. The test above can now be repeated for Step2.
2. The tests above can be repeated for 2 out of 3 and for 3 out of 3 operation mode.
3. The tests above can be repeated to check security, that is, the START and
operate signals, that are not supposed to appear, - do not.
4. The tests above can be repeated to check the time to reset.
5. The tests above can be repeated to test the inverse time characteristic.

Completing the test

Continue to test another function or end the testing by setting the parameter
TestMode to Off under Main menu/Tests/IED test mode/1:TESTMODE. If
another function is tested, then set the parameter Blocked to No, under Main menu/
Tests/Function test modes/<Function group>/<Function>/<1:Function> for the
function, or for each individual function in a chain, to be tested next. Remember to
set the parameter Blocked to Yes, for each individual function that has been tested.

Two step overvoltage protection OV2PTOV

Prepare the IED for verification of settings as outlined in
verify settings".
Values of the logical signals are available on the local HMI under: Main menu/
Tests/Function status/<Function group>/<Function>/<1:Function>. The Signal
monitoring tool in PCM600 shows the same signals that are available on the LHMI.
Section 5
Testing functionality
4.1 "Preparing the IED to
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