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1MRK 505 378-UEN Rev. K
Observe that the zones that are not tested have to be blocked and the zone that is tested has
to be released.
11.4.1.3
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.
11.4.2
Phase selection, quad, fixed angle, load encroachment
FDPSPDIS
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
IEC09000734 V4 EN-US
Figure 25:
Line differential protection RED670
Commissioning manual
and
24
for information.
1
4
85%
XN
)
ArgNegRes
50% of RLdFw
Operating characteristic for phase selection function, forward direction single-
phase faults
© 2017 - 2022 Hitachi Energy. All rights reserved
W
(
/
loop
)
X
5
60°
2
7
6
RFFwPE
Testing functionality by secondary injection
"Preparing the IED to verify
25
and
26
should be tested. See also
3
W
(
/
loop
)
R
IEC09000734-4-en.vsd
Section 11
M14944-167 v3
M13906-3 v10
settings".
103
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