ABB RER620 - Page 274

Section 4 1MAC309294-MB F
Protection functions
268 RER620
Technical Manual
Figure 133: Configurable directional characteristics (RCA =+60˚) for a solidly earthed
network
Figure 134: Configurable directional characteristics (RCA = -90 ˚ ) for an isolated
network
The 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
a negative value if operating signal IG or IN leads the polarizing quantity
–VG or –VN, respectively.
-VG( polarizing quantity)
IG (operating quantity)
RCA=+60 deg
Min forward
angle
Max forward
angle
Min reverse
angle
Max reverse
angle
Backward
area
Forward
area
N
o
n
-
o
p
e
r
a
t
i
n
g
a
r
e
a
Min operate voltage
Min operate current
N
o
n
-
o
p
e
r
a
t
i
n
g
a
r
e
a
N
o
n
-
o
p
e
r
a
t
i
n
g
a
r
e
a
Characteristic
Angle/ Max torque
line
Zero torque line
-VG ( polarizing quantity)
IG
(operating quantity)
RCA = -90 deg
Min reverse angle
Max reverse angle
Min forward
angle
Max forward
angle
Backward
area
Forward
area
Min operate voltage
Min operate current
Non-operating area
Non-operating area
Characteristic
Angle/ Max
Torque line
zero torque line