ABB RED670 Commissioning Manual page 121
Line differential protection
Hide thumbs
Also See for RED670:
- Commissioning manual (308 pages) ,
- Product manual (168 pages) ,
- Technical reference manual (1232 pages)
Table of Contents
Advertisement
1MRK 505 378-UUS Rev. J
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
setting tPP.
3.
Repeat steps
10 in figure
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 (21)
Prepare the IED for verification of settings as outlined in section
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
tables
29
Line differential protection RED670
Commissioning manual
29
and table
1
to
2
to find the operating time for the phase-to-ground fault according to test point
30
and table 28. Compare the result of the measurement with the setting tPG.
1
to
2
to find the operating time for all other used measuring zones.
and
30
for information.
© 2017 - 2021 Hitachi Power Grids. All rights reserved
27
for zone 1. Compare the result of the measurement with the
Testing functionality by secondary injection
GUID-9AEFB83B-A343-4965-BB41-59062CC0DB5F v3
GUID-701C863B-40C6-42D7-A0C8-ECEB084B1165 v4
"Preparing for test"
in this chapter.
31
and
32
should be tested. See also
Section 11
115
Advertisement
Table of Contents
