ABB Relion 670 Series Commissioning Manual page 126

Section 11
Testing functionality by secondary injection
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 28
X +
( 1
ANSI09000734 V2 EN-US
Figure 33:
120
and 29 for information.
X
1
4
85%
XN )
ArgNegRes
6
50% of RLdFwd
RFltFwdPG
Operating characteristic for phase selection function, forward direction single-phase
faults
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W
( / loop )
3
5
2
7
ANSI09000734-2-en.vsd
1MRK 504 165-UUS Rev. J
33 and 34 should be tested. See also
( )
W
loop
/
R
Transformer protection RET670
Commissioning manual