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
M14944-167 v3
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
M13906-3 v10
Prepare the IED for verification of settings outlined in Section
"Preparing the IED to verify settings".
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
27 and 28 should be tested. See also
tables
22 and 23 for information.
R
X
RFFwPE
1
3
5
2
4
ArgNegRes
85%
50% of RLdFw
6
IEC09000734-4-en.vsd
7
60°
)
/( loopW
)
/( loopW
)1( XNX +
IEC09000734 V4 EN-US
Figure 27: Operating characteristic for phase selection function, forward direction single-
phase faults
Section 11 1MRK 504 165-UEN Rev. K
Testing functionality by secondary injection
106 Transformer protection RET670
Commissioning manual
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