110
105
100
95
90
85
80
75
10
5
0
0
5
10
S = 1
WHERE Z OS = Z 1S
S = 2
S = 3
20
30
40
V F -FAULTED PHASE-TO-GROUND
VOLTAGE AT REALY TERMINALS
Figure 19. Impedance Curve for the SDGT Line of Relays
S = 1, 2, 3 WHERE SOURCE IMPEDANCE Z 0S = 3Z 1S
50
60
70
80
Sub 3
878A006
