Settings For Each Step - ABB RELION 650 Series Applications Manual

1MRK 505 363-UEN A
IEC09000636 V1 EN-US
Figure 72: Directional function characteristic
1. RCA = Relay characteristic angle
2. ROA = Relay operating angle
3. Reverse
4. Forward
8.2.3.1

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 15.
Table 15:
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 8
Current protection
M12982-19 v10.1.1
133