V
ref
I
dir
ANSI09000636-1-en.vsd
1
2
2
3
4
ANSI09000636 V1 EN-US
Figure 87: 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
M12982-19 v10
x means step 1, 2, 3 and 4.
DirModeSelx: The directional mode of step x. Possible settings are Disabled/Non-
directional/
Forward/Reverse.
Section 7 1MRK 505 370-UUS A
Current protection
178 Busbar protection REB670 2.2 ANSI
Application manual