ABB RET670 Installation And Commissioning Manual page 128

Section 13
Verifying settings by secondary injection
122
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
tested. See also tables 22
4
X +
( 1 XN )
50% of RLdFw
IEC09000734 V2 EN
Figure 54: Operating characteristic for phase selection function, forward
direction single-phase faults
and 23 for information.
W
( / phase
X
1
85%
5
ArgNegRes
2
6
RFFwPE
1MRK 504 088-UEN C
54 and 55
)
3
ArgLd
W
(
R
7
ArgDir
IEC09000734-2-en.vsd
Installation and commissioning manual
should be
/ phase )