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1MRK 505 370-UEN D
IMinOpPhSel : Minimum current setting level for releasing the directional start signals in % of
IB . This setting should be less than the lowest step setting. The default setting is 7% of IB .
2ndHarmStab : Operate level of 2nd harmonic current restrain set in % of the fundamental
current. The setting range is
IEC09000636 V2 EN-US
Figure 86: Directional function characteristic
1.
RCA = Relay characteristic angle
2.
ROA = Relay operating angle
3.
Reverse
4.
Forward
7.1.3.1
Settings for each step
DirModex : The directional mode of step x . Possible settings are Off / Non-directional / Forward /
Reverse .
Characteristx : Selection of time characteristic for step x . Definite time delay and different
types of inverse time characteristics are available according to Table 26.
Busbar protection REB670
Application manual
5 - 100 % in steps of 1%. The default setting is 20%.
3
2
x means step 1, 2, 3 and 4.
U
1
2
4
I
dir
IEC09000636_2_vsd
Section 7
Current protection
ref
M12982-19 v10
145
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