Measuring The Operating Time Of Distance Protection Zones - ABB RET670 Commissioning Manual
Transformer protection version 2.1 ansi
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Also See for RET670:
- Applications manual (1016 pages) ,
- Commissioning manual (328 pages) ,
- Installation and commissioning manual (240 pages)
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Section 10
Testing functionality by secondary injection
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
to figure
10.4.8.2
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 10 in figure
with the setting
3.
Repeat steps
point 10 in figure
t1PG .
4.
Repeat steps
Observe that the zones that are not tested have to be blocked and the zone that is tested has
to be released.
10.4.8.3
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.
10.4.9
Power swing detection ZMRPSB (68)
The aim is to verify that the settings of the Power swing detection function ZMRPSB (68) is
according to the setting table and to verify that ZMRPSB (68) operates as expected.
Prepare the IED for verification of settings outlined in section "Requirements" and section
"Preparing for test" in this chapter.
Before starting this process, all impedance measuring zones shall be set and in operation. Test the
outer resistive boarder in forward and reverse direction,
reactive boarder in forward and reverse direction
The corresponding resistive border for the inner resistive boundary and outer resistive boundary
is calculated automatically from the setting of
The inner zone of ZMRPSB (68) must cover all zones by at least 10% margin.
108
1
to
3
to find the operating value for the phase-to-ground fault C-G according
27
and table 30.
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).
26
and table
t1PP .
1
to
2
to find the operating time for the phase-to-ground fault according to test
27
and table 30. Compare the result of the measurement with the setting
1
to
2
to find the operating time for all other used measuring zones.
29
for zone 1. Compare the result of the measurement
RLdOutFw and RLdOutRv and the inner
X1InFw and X1InRv . See figure 28.
kLdRFw and kLdRRv .
1MRK 504 154-UUS B
GUID-70AEC42A-9BC7-445A-AE21-2CEC0C3A79DC v3
GUID-7FA2EA27-B6E2-48AB-8D53-22425E322FFA v1
TestMode setting to Disabled .
Commissioning manual
M13888-2 v9
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