Completing The Test; Rate-Of-Change Frequency Protection Sapfrc; Verifying The Settings; Multipurpose Protection - ABB Relion 670 Series Commissioning Manual

1MRK 504 165-UEN E
5. Slowly increase the frequency of the applied voltage, to a value above
6. Check that the START signal does not appear.
7. Wait for a time corresponding to
11.7.2.2

Completing the test

continue to test another function or end the test by changing the
Restore connections and settings to their original values, if they were changed for testing
purposes.
11.7.3

Rate-of-change frequency protection SAPFRC

Prepare the IED for verification of settings as outlined in section
section
11.7.3.1

Verifying the settings

Verification of START value and time delay to operate
1. Check that the settings in the IED are appropriate, especially the START value and the
definite time delay. Set
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
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
1. The test above can be repeated to check a positive setting of
2. The tests above can be repeated to check the time to reset.
3. The tests above can be repeated to test the RESTORE signal, when the frequency
recovers from a low value.
11.7.3.2 Completing the test
continue to test another function or end the test by changing the
Restore connections and settings to their original values, if they were changed for testing
purposes.
11.8

Multipurpose protection

11.8.1

General current and voltage protection CVGAPC

Prepare the IED for verification of settings as outlined in section
section
Transformer protection RET670
Commissioning manual
"Preparing for test" in this chapter.
StartFreqGrad , to a rather small negative value.
"Preparing for test" in this chapter.
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tDelay , make sure that the TRIP signal does not appear.
StartFreqGrad , and check that the START signal
Testing functionality by secondary injection
StartFrequency .
TESTMODE setting to Off .
"Requirements" and
StartFreqGrad .
TESTMODE setting to Off .
"Requirements" and
Section 11
M16290-52 v5
M16256-2 v6
M16256-8 v1
M16256-10 v5
M16256-29 v4
M16256-39 v4
SEMOD53552-1 v1
SEMOD56488-3 v4
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