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
for zone 1. Compare the result of the
measurement with the setting
t1PP.
3.
Repeat steps 1 to 2 to find the operating time for the phase-to-earth fault according to
. Compare the result of the measurement with the
setting
t1PE.
4.
Repeat steps 1 to 3 to find the operating time for all other used measuring zones.
Observe that the zones that are not tested have to be blocked and the zone that is tested
has to be released.
12.4.1.3
Completing the test
M14944-167 v3
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.
12.4.2
M13906-3 v9
Phase selection with load encroachment, quadrilateral
characteristic FDPSPDIS
Prepare the IED for verification of settings outlined in
section "Requirements" and
section "Preparing for test" in this chapter.
The phase selectors operate on the same measuring principles as the impedance measuring
zones. So it is necessary to follow the same principles as for distance protection, when
performing the secondary injection tests.
Measure operating characteristics during constant current conditions. Keep the measured
current as close as possible to the rated value of its associated input transformer, or lower.
But ensure that 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.
To verify the settings the operating points according to figures
35
and
36
should be tested.
See also tables
19
and
20
for information.
Section 12
1MRK 502 067-UEN B
Testing functionality by secondary injection
106
Commissioning manual
