7. Increase the measured voltage to rated load conditions.
8. Check that the START signal resets.
9. Instantaneously decrease the voltage in one phase to a value about 20% lower
than the measured operate value.
10. Measure the operate time for the TRIP signal.
11. Repeat the above described steps for Step 2 of the function.
Extended testing
M13796-35 v8
The tests above can be repeated for All phases operation mode.
10.6.1.2 Completing the test
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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.
10.6.2 Two step overvoltage protection O2RWPTOV
GUID-58950320-A578-43C1-9BA8-F9BAF228089E v2
Prepare the IED for verification of settings outlined in Section "Preparing the IED
to verify settings".
Values of the logical signals for O2RWPTOV are available on the local HMI under
Main menu/Tests/Function status/Voltage protection/OverVoltage2Step(59,
2(2U>))/O2RWPTOV(59;2(2U>)):x, where x = 1, 2.
The Signal Monitoring in PCM600 shows the same signals that are available on the
local HMI.
10.6.2.1 Verifying the settings
M13806-9 v2
Verification of start value and time delay to operate for Step 1
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1. Check that IED settings are appropriate i.e. U1> and t1 and set OpMode1 to
Any phase mode. Also, set ConnType to PhNDFT.
2. Supply the IED with two-phase voltages at their rated values.
3. Slowly increase the voltage in one of the phases until the START signal
appears.
4. Note the operate value and compare it with the set value U1>.
5. Observe that TRIP signal appears after set time delay of t1 s.
The operate value in secondary volts is calculated according
to the following equations:
For phase-to-earth measurement:
1MRK 506 377-UEN C Section 10
Testing functionality by secondary injection
Railway application RER670 2.2 IEC 121
Commissioning manual
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