1. Subject the IED to healthy normal load conditions for at least two seconds.
2. Apply the fault condition and slowly decrease the measured impedance to
find the operating value of the phase-to-phase fault for zone 1 according to
test point 1 in figure 12 and table 15. Compare the result of the measurement
with the set value.
3. Repeat steps
1 to 2 to find the operating value for test points 2, 3 in table 15
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 to find the operating value for the phase-to-earth fault L3-
E according to figure 13 and table 16.
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 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).
9.3.1.2 Measuring the operating time of distance protection zones
GUID-BB93C603-F43E-40CB-8EFA-3B0F280C011D v5
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 12 in figure 12 and table 15 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 13 and table 16. 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.
9.3.1.3 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.
1MRK 506 383-UEN A Section 9
Testing functionality by secondary injection
Line distance protection REL650 2.2 IEC 77
Commissioning manual
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