ABB Relion 650 Series Applications Manual page 79

1MRK 505 287-UUS B
ANSI09000636 V1 EN-US
Figure 28: Directional function characteristic
1. RCA = Relay characteristic angle 55°
2. ROA = Relay operating angle 80°
3. Reverse
4. Forward
7.1.3.1 Settings for steps 1 to 4
DirModeSelx : The directional mode of step x . Possible settings are Disabled / Non-directional /
Forward / Reverse .
Characteristn : Selection of time characteristic for step n . Definite time delay and different types of
inverse time characteristics are available according to table 10. Step 2 and 3 are always definite
time delayed.
Busbar protection REB650
Application manual
3
2
n means step 1 and 4. x means step 1, 2, 3 and 4.
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Section 7
Current protection
M12982-19 v6.1.1
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