7SG11 Argus User Manual
©2013 Siemens Protection Devices Limited
P20006 Page 34 of 37
53
54
49
50
45
46
25
26
79
80
81
82
83
dn
da
A phase I/P
B phase I/P
C phase I/P
Earth-fault I/P
End 1
Direction
of load
power flow
P
1
P
2
S
1
S
2
M
L
3 pole directional phase-fault
and directional earth-fault
forward
reverse
I
a
V
ref
phase-fault element
forward
reverse
I
a
V
pol
earth-fault element
V
pol
= V
bn
+ V
cn
+ve
-ve
I
a
I
a
79
80
81
82
83
dn
da
End 2
Direction
of load
power flow
3 pole directional phase-fault
and directional earth-fault
forward
reverse
I
a
V
ref
phase-fault element
forward
reverse
I
a
V
pol
earth-fault element
V
pol
= V
bn
+ V
cn
+ve
-ve
53
54
49
50
45
46
25
26
A phase I/P
B phase I/P
C phase I/P
Earth-fault I/P
P
1
P
2
S
1
S
2
M
L
I
a
I
a
test
S/C
A phase fuse
removed
test
S/C
test S/C
test
S/C
A phase fuse
removed
test S/C
test
S/C
LOAD
Note that the terminal numbers in this diagram
refer to an Argus AG2-4x5/4x6. The terminals
available on other models may be different,
however, the principle remains the same.
Figure 4-8
Resultant Applied Voltages and Currents for a Simulated Earth Fault Condition using
Load Current