ABB RED670 Commissioning Manual page 112

Section 11
Testing functionality by secondary injection
11.4.1.3 Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
11.4.2 Phase selection, quad, fixed angle, load encroachment FDPSPDIS
(21)
Prepare the IED for verification of settings 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 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.
To verify the settings the operating points according to figures
tables 23
X +
( 1
ANSI09000734 V2 EN-US
Figure 25:
106
and 24 for information.
X
1
4
85%
XN )
ArgNegRes
6
50% of RLdFwd
RFltFwdPG
Operating characteristic for phase selection function, forward direction single-phase
faults
© 2017 - 2021 Hitachi Power Grids. All rights reserved
W
( / loop )
3
5
2
7
ANSI09000734-2-en.vsd
1MRK 505 378-UUS Rev. J
"Preparing the IED to verify
25 and 26 should be tested. See also
( )
W
loop
/
R
Line differential protection RED670
Commissioning manual
M14944-167 v3
M13906-3 v10
settings".