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Section 11
Testing functionality by secondary injection
11.4.7.4
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 for zone 1. Compare the result of the measurement to the setting tPPZ1.
3.
Repeat steps
12. Compare the result of the measurement to the setting tPEZ1.
4.
Repeat steps
The zones that are not tested have to be blocked and the zone that is tested has to be
released.
11.4.7.5
Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
11.4.8
High Speed distance for series compensated line zones,
quadrilateral and mho characteristic ZMFCPDIS
Prepare the IED for verification of settings outlined in Section
11.4.8.1
Function revision history
Document
revision
A
B
C
D
E
F
G
H
J
118
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 seven 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).
1
to
2
to find the operating time for the phase-to-earth fault according to test point
1
to
2
to find the operating time for all other used measuring zones.
Product
History
revision
2.2.1
Impedance measurement and supervision added (ZMMXU).
2.2.1
-
2.2.2
-
2.2.3
Transient directional (TD) element added, with associated input and outputs.
2.2.3
-
2.2.4
-
2.2.4
-
2.2.4
Zone BU (Backup) is added. Now there are seven zones in total. Zone 2 direction and
directional blinders (ArgDir, ArgNegRes) are now settable. Setting tTauDC is added; a
parameter for optional fine tuning of performance.
Added new setting RStart, which limits the resistive reach of the phase selection outside
of the ArgLd sector. Changed setting name XLd to XStart.
2.2.5
Parallel line mutual coupling compensation feature based on the parallel line residual
current is added with new settings: EnaPar, INPRatio, R0MZ1, X0MZ1, R0MZ2, and
X0MZ2.
Load compensation and direction element are improved for earth faults without zero
sequence current condition.
This update is valid for all the previously released 2.2 products.
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1MRK 505 378-UEN Rev. K
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"Preparing the IED to verify
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Line differential protection RED670
Commissioning manual
settings".
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