Measuring The Operating Time Of Distance Protection Zones; Phase Selection, Quadrilateral Characteristic With Settable Angle Frpspdis - ABB Relion 670 Series Commissioning Manual
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- Technical manual (1432 pages) ,
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1MRK 504 165-UEN E
1.
Subject the IED to healthy normal load conditions for at least two seconds.
2.
Apply the fault condition and slowly decrease the measured impedance to find the
operating value of the phase-to-phase fault for zone 1 according to test point 1 in
figure
3.
Repeat steps
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 1 to 3 above to find the operating value for the phase-to-earth fault L3-E
according to figure
11.4.5.2
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
measurement with the setting
3.
Repeat steps
test point 10 in figure
setting
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.
11.4.6
Phase selection, quadrilateral characteristic with settable
angle FRPSPDIS
Prepare the IED for verification of settings as outlined in section
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 30% of the rated current.
Ensure that the maximum continuous current of an 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
See also tables
Transformer protection RET670
Commissioning manual
31
and table 26. Compare the result of the measurement with the set value.
1
to
2
to find the operating value for test points 2, 3 in table26.
32
and table 27.
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 5
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).
1
to
2
to find the operating time for the phase-to-earth fault according to
32
and table 27. Compare the result of the measurement with the
tPE .
1
to
2
to find the operating time for all other used measuring zones.
28
and
29
for information.
© Copyright 2017 ABB. All rights reserved
31
and table
26
for zone 1. Compare the result of the
tPP .
Testing functionality by secondary injection
GUID-9AEFB83B-A343-4965-BB41-59062CC0DB5F v3
GUID-701C863B-40C6-42D7-A0C8-ECEB084B1165 v4
"Preparing for test"
in this
33
and
34
should be tested.
Section 11
119
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