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Section 10
Testing functionality by secondary injection
10.4.8.2
10.4.8.3
10.4.9
116
Observe that the zones that are not tested have to be blocked and the zone that is
tested has to be released.
4.
Repeat steps
1
to
3
according to figure
Test points 8, 9, 10 and 11 are intended to test the directional
lines of impedance protection. Since directionality is a common
function for all six measuring zones, it is only necessary to test
points 8, 9, 10 and 11 once, in the forward direction in order to
test the accuracy of directionality (directional angles).
Directional functionality testing (trip inside, no-trip outside)
should always be made for all impedance zones set with
directionality (forward or reverse).
Measuring the operating time of distance protection zones
Procedure:
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 10 in figure
of the measurement with the setting t1PP.
3.
Repeat steps
1
to
2
according to test point 10 in figure
measurement with the setting t1PE.
4.
Repeat steps
1
to
2
Observe that the zones that are not tested have to be blocked and the zone that is
tested has to be released.
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.
Power swing detection ZMRPSB
The aim is to verify that the settings of the Power swing detection function ZMRPSB
is according to the setting table and to verify that ZMRPSB operates as expected.
Prepare the IED for verification of settings outlined in section
verify
settings".
Before starting this process, all impedance measuring zones shall be set and in
operation. Test the outer resistive boarder in forward and reverse direction,
to find the operating value for the phase-to-earth fault L3-E
27
and table 30.
26
and table
to find the operating time for the phase-to-earth fault
27
and table 30. Compare the result of the
to find the operating time for all other used measuring zones.
1MRK 506 355-UEN A
29
for zone 1. Compare the result
"Preparing the IED to
Line distance protection REL670 2.1 IEC
Commissioning manual
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