ABB Relion REC670 - Settings for each Step

U
ref
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dir
IEC09000636_1_vsd
1
2
2
3
4
IEC09000636 V1 EN-US
Figure 43: Directional function characteristic
1. RCA = Relay characteristic angle
2. ROA = Relay operating angle
3. Reverse
4. Forward
7.2.3.1 Settings for each step
M12982-19 v10.1.1
x
means step 1, 2, 3 and 4.
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 14.
Table 14: Inverse time characteristics
Curve name
ANSI Extremely Inverse
ANSI Very Inverse
ANSI Normal Inverse
Table continues on next page
1MRK 511 358-UEN A Section 7
Current protection
107
Application manual