function for all 5 measuring zones, it is only necessary to test
points 6, 7, 8 and 9 once, in the forward direction (the largest
reverse zone can be used to facilitate the test) in order to test the
accuracy of directionality (directional angles). Directional
functionality testing (trip inside, no-trip outside) should always
be carried for all impedance zones set with directionality
(forward or reverse).
12.4.2.2 Measuring the operating time of distance protection zones
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 31 and Table 12 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 32 and Table 13. 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.
When the load-shaped characteristic is activated (OperationLdCmp = "On"), the
test point for phase-to-phase faults is 12 in
Figure 31 and Table 12 and for phase-
earth faults according to test point 12 in
Figure 32 and Table 13.
12.4.2.3 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.
12.4.3 Distance protection zones, quadrilateral characteristic
ZMFCPDIS
Prepare the IED for verification of settings outlined in section
"Requirements" and
section "Preparing for test" in this chapter.
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.
Section 12 1MRK502053-UEN B
Testing functionality by secondary injection
114 Generator protection REG670 2.0 IEC
Commissioning manual
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