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.
Section 10
1MRK 511 360-UEN A
Testing functionality by secondary injection
130
Bay control REC670 2.1 IEC
Commissioning manual
Содержание Relion REC670
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