7.
Wait for a time corresponding to (
100 ms), and check that the TRIP signal does
not appear.
8.
Slowly increase the magnitude of the applied voltages until the
BLKDMAGN signal resets.
9.
Verify that the signal
START appears and wait for a time at least equal to (100 ms)
to verify that also the signal TRIP becomes active.
7.5.2.2
Completing the test
M16290-52 v5
Continue to test another function or end the testing by setting the parameter
TestMode to Off
under Main menu/Tests/IED test mode/TESTMODE:1. If another function is tested, then set
the parameter
Blocked to No under Main menu/Tests/Function test modes/Frequency/
SAPTOF(81,f>)/SAPTOF:X for the function, or for each individual function in a chain, to be
tested next. Remember to set the parameter
Blocked to Yes, for each individual function that
has been tested.
7.5.3
Rate-of-change frequency protection SAPFRC
M16256-2 v6.1.1
Prepare the IED for verification of settings as outlined in section
Values of the logical signals for SAPFRC are available on the local HMI under Main menu/
Tests/Function status/Frequency/SAPFRC(81,df/dt)/SAPFRC:X. The Signal Monitoring in
PCM600 shows the same signals that are available on the local HMI.
7.5.3.1
Verifying the settings
Verification of START value and time delay to operate
M16256-10 v4
1.
Check that the appropriate settings are available in the IED, especially the START value
and the definite time delay. Set
StartFreqGrad, to a rather small negative value.
2.
Supply the IED with three-phase voltages at their rated values.
3.
Slowly decrease the frequency of the applied voltage, with an increasing rate-of-change
that finally exceeds the setting of
StartFreqGrad, and check that the START signal
appears.
4.
Note the operate value and compare it with the set value.
5.
Increase the frequency to rated operating conditions, and zero rate-of-change.
6.
Check that the START signal resets.
7.
Instantaneously decrease the frequency of the applied voltage to a value about 20%
lower than the nominal value.
8.
Measure the time delay for the TRIP signal, and compare it with the set value.
Extended testing
M16256-29 v4
1.
The test above can be repeated to check a positive setting of
StartFreqGrad.
2.
The tests above can be repeated to test the RESTORE signal, when the frequency
recovers from a low value.
7.5.3.2
Completing the test
M16256-39 v4
Continue to test another function or end the testing by setting the parameter
TestMode to Off
under Main menu/Tests/IED test mode/TESTMODE:1. If another function is tested, then set
the parameter
Blocked to No under Main menu/Tests/Function test modes/Frequency/
SAPFRC(81,df/dt)/SAPFRC:X for the function, or for each individual function in a chain, to be
tested next. Remember to set the parameter
Blocked to Yes, for each individual function that
has been tested.
1MRK 505 293-UEN B
Section 7
Testing functionality
Breaker protection REQ650
73
Commissioning manual
© Copyright 2013 ABB. All rights reserved
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