1. Subject the IED to healthy normal load conditions for at least two seconds.
2. Apply the fault condition to find the operating time for the phase-to-phase
fault according to test point
12 in figure
33 and table 30 for zone 1. Compare
the result of the measurement to the setting tPPZ1.
3. Repeat steps 1 to 2 to find the operating time for the phase-to-earth
fault
according to test point 12 in figure
34 and table 31. Compare the result of the
measurement to the setting tPEZ1.
4. Repeat steps 1 to 2 to find the operating time for all other used measuring
zones.
The zones that are not tested have to be blocked and the zone that is tested
has to be released.
11.4.7.3 Completing the test
GUID-60C5389E-B021-45BB-8CB3-E21348CF50EF v2
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.
11.4.8 High Speed distance for series compensated line zones,
quadrilateral and mho characteristic ZMFCPDIS
GUID-EE954483-7157-4EA2-A5DD-537DF6864BC2 v4
Prepare the IED for verification of settings outlined in Section
"Preparing the IED
to verify settings".
Measure operating characteristics during constant current conditions. Keep the
measured current as close as possible to its rated value or lower. But make sure it is
higher than the set minimum operating current.
Ensure that the maximum continuous current to the IED does not exceed four times
its rated value, if the measurement of the operating characteristics runs under
constant voltage conditions.
The test procedure has to take into consideration that the shaped load encroachment
characteristic is active. It is therefore necessary to check the setting. To verify the
settings with the shaped load encroachment characteristic the test should be carried
out according to figures 35 and 36 and tables 32 and 33. In cases where the load
encroachment characteristic is activated tests according to the adjusted figures
should be carried out.
To verify the settings for the operating points according to the following fault types
should be tested:
•
One phase-to-phase fault
• One phase-to-earth fault
The shape of the operating characteristic depends on the values of the setting
parameters.
Section 11 1MRK 505 378-UEN A
Testing functionality by secondary injection
136 Line differential protection RED670 2.2 IEC
Commissioning manual
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