Measuring The Operating Time Of Distance Protection Zones - ABB RET670 Commissioning Manual

Section 10
Testing functionality by secondary injection
10.4.7.2

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 12 in figure
the setting
3. Repeat steps
point 12 in figure
t1PG .
4. Repeat steps
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
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 (21)
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.
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
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:
104
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).
24 and table
tPPZ1 .
1 to 2 to find the operating time for the phase-to-ground fault according to test
25 and table 28. Compare the result of the measurement to the setting
1 to 2 to find the operating time for all other used measuring zones.
and 27 and tables 29 and 30. In cases where the load encroachment characteristic is
27 for zone 1. Compare the result of the measurement to
1MRK 504 154-UUS B
GUID-BB93C603-F43E-40CB-8EFA-3B0F280C011D v5
GUID-60C5389E-B021-45BB-8CB3-E21348CF50EF v2
TestMode setting to Disabled .
GUID-EE954483-7157-4EA2-A5DD-537DF6864BC2 v3
Commissioning manual