ABB REG670 2.0 IEC Commissioning Manual page 198

Section 12
Testing functionality by secondary injection
192
Verification of the ACCALARM value and time delay to operation
1. Connect the test set for the injection of three-phase currents and three-phase
voltages to the appropriate current and voltage terminals of the IED.
2. Ensure that the settings in the IED are appropriate for the default settings,
especially the CurrStartLevel, FreqHighLimit, FreqLowLimit, UHighLimit and
ULowLimit setting.
3. Supply the IED with three-phase currents and voltages at their rated value.
4. Slowly decrease the frequency of the applied voltage until it crosses the
frequency high limit and the START signal appears.
5. Continuously change the frequency of the applied voltage, so that for a certain
time the frequency is outside the set band limit and falls gradually within the band
limit.
6. Count only the time when the frequency lies within the set frequency band limit.
Wait for a time corresponding to tAccLimit and ensure that the ACCALARM signal
appears.
7. Measure the time delay for the ACCALARM signal and compare it to the set value.
Extended testing
1. To check the value of TRIPACC, repeat the above test case in such a way that the
frequency of the applied voltage is within the set frequency band when time
approaches the tAccLimit setting value.
Verification of generator start and stop logic
1. Ensure that the settings in the IED are appropriate to the default settings,
especially the CurrStartLevel, FreqHighLimit, FreqLowLimit, UHighLimit and
ULowLimit.
2. Ensure that the setting CBCheck is enabled.
3. Supply the IED with three-phase currents and voltages at their rated values.
4. Slowly decrease the frequency of the applied voltage until the START signal
appears.
5. Activate the CBOPEN input signal.
6. Slowly decrease the injected current below the CurrStartLevel value until the
START signal disappears.
7. Compare the current magnitude value to the set value.
Verification of voltage band limit check logic
1. Ensure that the settings in the IED are appropriate to the default settings,
especially the CurrStartLevel, FreqHighLimit, FreqLowLimit, UHighLimit and
ULowLimit settings.
2. Ensure that the EnaVoltCheck is enabled.
3. Supply the IED with three-phase currents and voltages at their rated values.
4. Check that the VOLTOK signal appears.
5. Slowly decrease the frequency of the applied voltage until the START signal
appears.
1MRK502053-UEN B
Generator protection REG670 2.0 IEC
Commissioning manual