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 24 and table 27 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
25 and table 28. 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.
10.4.7.3 Completing the test
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.
10.4.8 High Speed distance for series compensated line zones,
quadrilateral and mho characteristic ZMFCPDIS
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
26 and 27 and tables 29 and 30. 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 10 1MRK 506 355-UEN A
Testing functionality by secondary injection
112 Line distance protection REL670 2.1 IEC
Commissioning manual
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