20
Figure 9
Multi-Phase Power Measurement Techniques
Inst.
Pwr.
+
-
Output
A
B
C
a) Circuit Connections for Power Measurement in a 3 Phase,
4 Wire System, using a 3-Element Transducer
L
1
L
2
L
I
N
E
L
1
L
2
L
O
A
D
L
3
N
in
V
in
in
in
V
in
V
in
L
3
N
Inst.
Pwr.
+
-
Output
L
1
L
2
L
I
N
E
L
3
in
V
in
in
V
in
L
1
L
2
L
O
A
D
L
3
A
B
b) Circuit Connections for Power Measurement in a 3 Phase,
3 Wire System, Using a 2-Element Transducer
