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
"Preparing the IED
to verify settings".
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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