Delta DPM-C530A - Page 13

12
I1+
I1-
I2+
I2-
I3+
I3-
V1 V2 V3 Vn
A NB C
I1+
I1-
I2+
I2
-
I3+
I3
-
V1 V2 V3 Vn
A NB C
Diagram 5-5: Three-phase three-wire,
Δ Delta-connection, 3 CT, 2 PT
Diagram 5-6: Three-phase four-wire,
Y-connection, 3 CT, No PT
I1+
I1-
I2+
I2
-
I3+
I3
-
V1 V2 V3 Vn
A N
B C
I1+
I1-
I2+
I2
-
I3+
I3
-
V1 V2 V3 Vn
A N
B
C
Diagram 5-7: Three-phase four-wire,
Y-connection, 3 CT, 3 PT
Diagram 5-8: Three-phase four-wire,
Y-connection, 2 CT, 3 PT
■
The following symbols are used in the diagram:
Symbol
Description Grounding
Current
transformer
Terminal resistor
Potential
or voltage
transformer
Fuse