Figure 4-1 Directional Earth Fault Boundary System Angles; Figure 4-2 Directional Phase Fault Boundary System Angles; Table 4-3 Limits Of Operate Pick-Up Relay Angle Boundaries - Siemens 7SG11 Manual

a
A
B
b
+90 0
REV
+120 0
0
+150
Figure 4-1 Directional Earth Fault Boundary System Angles
a
A
B
b
0
+90
+120 0
REV
V
C
0
+150
Figure 4-2 Directional Phase Fault Boundary System Angles
Table 4-3 Limits of Operate Pick-up Relay Angle Boundaries
Pole CA Direction
A,B,C forward lag
forward lead
+45
reverse lead
reverse lag
+30 forward lag
forward lead
©2013 Siemens Protection Devices Limited
V
RES
0
0
0
-30
I
FWD
RES
0
-60
C.A.
-90
c
C
D
d
0
180
V
A
0
0
0
-30
I
A
FWD
-60
0
90 - C.A.
C
D
d
0
180
Operate (PU)
limits (I wrt V)
-37.5 -47.5
127.5 137.5
-42.5 -52.5
132.5 142.5
-52.5 -62.5
112.5 122.5
Apply residual voltage either directly to input or
by reducing voltage of faulted phase.
Adjust the phase angle of the residual current
relative to the voltage:
0
Verify directional pick-up and drop off at points
A, B, C and D
Alternatively,
Verify correct directional indication at points a,
b, c and d (C.A +80
With balanced 3-phase system quantities:
Adjust the phase angle of the currents
relative to the voltages:
0
Verify directional pick-up and drop off at
points A, B, C and D
0
-90
Alternatively,
Verify correct directional indication at points
c
a, b, c and d (C.A +80
V
B
Pole CA
E/F forward lag
forward lead
-45
reverse lead
reverse lag
-65 forward lag
forward lead
7SG11 Argus User Manual
0 0 0 0
, +100 , -80 , -100 )
0 0 0
, +100 , -80 , -100
Operate (PU)
Direction
limits (I wrt V)
-127.5
37.5
-132.5
42.5
-147.5
17.5
P20006 Page 23 of 37
0
)
-137.5
47.5
-142.5
52.5
-157.5
27.5