9.6.1.2
Completing the test
M16289-57 v5
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.
9.6.2
Overfrequency protection SAPTOF
M16290-2 v7
Prepare the IED for verification of settings outlined in Section
9.6.2.1
Verifying the settings
M16290-12 v2
Verification of START value and time delay to operate
M16290-14 v6
1.
Check that the IED settings are appropriate, for example the start value and
the time delay.
2.
Supply the IED with three-phase voltages at their rated values and initial
frequency.
3.
Slowly increase the frequency of the applied voltage with a 40 mHz step,
applying it for a period that is 10% longer than
tDelay
.
4.
Note the operate value and compare it with the set value.
5.
Decrease the frequency to rated operating conditions.
6.
Check that the START signal resets.
7.
Set the frequency to 20 mHz under the operate value.
8.
Increase the frequency with a 40 mHz step, applying it for a period that is
10% longer than
tDelay
.
9.
Measure the time delay for the TRIP signal, and compare it with the set value.
Note that the measured time consists of the set value for time delay plus
minimum operate time of the start function (80 - 90 ms).
Extended testing
M16290-28 v4
1.
The test above can be repeated to check the time to reset.
Verification of the low voltage magnitude blocking
M16290-34 v6
1.
Check that the settings in the IED are appropriate, for example the
StartFrequency
and the
tDelay
.
2.
Supply the IED with three-phase voltages at their rated values.
3.
Slowly decrease the magnitude of the applied voltage, until the BLKDMAGN
signal appears.
4.
Note the voltage magnitude value and compare it with the set value.
Section 9
1MRK 506 383-UEN A
Testing functionality by secondary injection
128
Line distance protection REL650 2.2 IEC
Commissioning manual
Содержание REL650 series
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