Settings For Each Step - ABB Relion REC670 Applications Manual

1MRK 511 358-UEN A
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

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:
Curve name
ANSI Extremely Inverse
ANSI Very Inverse
ANSI Normal Inverse
Table continues on next page
Application manual
3
2
x means step 1, 2, 3 and 4.
Inverse time characteristics
U
ref
1
2
4
I
dir
IEC09000636_1_vsd
Section 7
Current protection
M12982-19 v10.1.1
107