ABB rec670 Commissioning Manual page 136

Section 10
Testing functionality by secondary injection
130
Verification of the START 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, 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. Check that the FREQOK signal appears.
6. Compare the operate value to the set frequency high limit value.
7. Decrease the frequency of the applied voltage until it crosses the frequency low
limit and the START signal disappears.
8. Check that the FREQOK signal disappears.
9. Compare the reset value to the set frequency low limit value.
10. Readjust the frequency of the applied voltage (with steps of 0.001 Hz/s) to a value
within the set frequency band limit.
11. Ensure that the START signal reappears.
12. Wait for a time corresponding to tCont and ensure that the TRIP and TRIPCONT
signals are generated.
13. Measure the time delay for the TRIP signal and compare it to the set value.
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.
1MRK 511 360-UEN A
Bay control REC670 2.1 IEC
Commissioning manual