Figure 4-3 Secondary Injection Test Circuit; Figure 4-4 Directional Test Circuit; Figure 4-5 Two-Out-Of-Three Directional Test Circuit; Figure 4-6 Phase To Earth Primary Injection Test Circuit - Siemens 7SG11 Manual

240V a.c.
supply
time interval meter
START
auxiliary
d.c. supply
STOP
Figure 4-3 Secondary Injection Test Circuit
phase shifting
transformer
240V a.c.
supply
Figure 4-5 Two-out-of-three Directional
Test Circuit
Figure 4-7
©2013 Siemens Protection Devices Limited
A
A
B or E/F
C
E/F or SEF/REF
+ -
V
A
V
V
B
V
C
A
I
A
I
B
I
C
A B C
Phase to Phase Primary Injection Test Circuit
phase shifting
transformer
240V a.c.
supply
Figure 4-4
A B C
Figure 4-6 Phase to Earth Primary Injection
A
A
E/F or SEF/REF
+
primary injection
test source
7SG11 Argus User Manual
A B C
82 83 81
V
83 81 82
phase
angle
meter
A
53 49 45
54 50 46
Directional Test Circuit
A
E/F or SEF/REF
+
primary injection
test source
Test Circuit
-
P20006 Page 33 of 37
E/F
79
80
25
26
-