10.6.3.2
Completing the test
SEMOD54358-38 v4
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.
10.7
Frequency protection
SEMOD53547-1 v1
10.7.1
Underfrequency protection SAPTUF
M16289-2 v7
Prepare the IED for verification of settings outlined in Section
.
10.7.1.1
Verifying the settings
M16289-15 v3
Verification of START value and time delay to operate
M16289-17 v7
1.
Check that the IED settings are appropriate, for example the start value and
the time delay.
2.
Supply the IED with two-phase voltages at their rated values and initial
frequency.
3.
Slowly decrease the voltage frequency by steps of 40 mHz until the START
signal appears; during each step apply the voltage signal for a time that is
either at least 10% longer than (
tDelay
+100ms) or a suitable time to monitor
the function.
4.
Note the frequency value at which the START signal appears and compare it
with the set value
StartFrequency
.
5.
Increase the frequency until its rated value is reached.
6.
Check that the START signal resets.
7.
Supply the IED with three-phase voltages at their rated values and frequency
20 mHz over the set value
StartFrequency
.
8.
Decrease the frequency with a 40 mHz step, applying it for a time that is at
least 10% longer than (
tDelay
+100ms).
9.
Measure the time delay of the
TRIP
signal, and compare it with the set value
tDelay
. 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
M16289-31 v6
1.
The test above can be repeated to check the time to reset.
1MRK 506 377-UEN C
Section 10
Testing functionality by secondary injection
Railway application RER670 2.2 IEC
123
Commissioning manual
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