ABB RELION 620 Series Technical Manual page 354

Section 4
Protection functions
348
Max reverse
angle
Backward
area
Min trip voltage
Min reverse
GUID-93E8B2C8-DF59-47A9-BD3F-E4098C330A53-ANSI V1 EN
Figure 158: Configurable directional characteristics (RCA =+60˚ ) for a solidly
grounded network
RCA = -90 deg
Characteristic
Angle/ Max
IG
Torque line
(operating quantity)
Min trip voltage
GUID-2DE79FDD-FBA6-4CC8-BA23-A9B86006B5F7-ANSI V1 EN
Figure 159: Configurable directional characteristics (RCA = -90˚ ) for an isolated
network
Characteristic angle should be set to a positive value if the operating
signal IG or IN lags the polarizing quantity –VG or –VN, respectively, and
-VG( polarizing quantity)
RCA=+60 deg
Min forward
angle
IG (operating quantity)
Max forward
angle
angle
Zero torque line
Min trip current
-VG ( polarizing quantity)
Max forward
Min reverse angle
angle
Min forward
Max reverse angle
angle
Min trip current
zero torque line
1MAC504801-IB E
Characteristic
Angle/ Max torque
line
Forward
area
620 series ANSI
Technical Manual