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
BFI_3P
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 trip
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
PickupCurrentLevel
,
FreqHighLimit
,
FreqLowLimit
,
VHighLimit
and
VLowLimit
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
BFI_3P
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
PickupCurrentLevel
,
FreqHighLimit
,
FreqLowLimit
,
VHighLimit
and
VLowLimit
.
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
BFI_3P
signal
appears.
5. Activate the
CBOPEN
input signal.
6. Slowly decrease the injected current below the
PickupCurrentLevel
value until the
BFI_3P
signal disappears.
7. Compare the current magnitude value to the set value.
Section 11
1MRK 511 366-UUS -
Testing functionality by secondary injection
144
Commissioning manual
Содержание RES670 2.1
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