IPP-S Installation guide Digipower Inc.
4
3P4W installation Diagram
Notes:
1.
V
L1-N
= V
L2-N
= V
L3-N
, V
L1-L2
= V
L2-L3
= V
L3-L1
=
√3 * V
L1-N
=380V
2.
The figure shows C1, C2 and C3 detect 3P4W Y type power source. C4~C12 detect phase to Neutral.
3.
In the measurement of 3P4W power consumption, the N as the reference point, with three wattmeter measurement, measure
the voltage between L1-N with current in L1, L2-N with current in L2 and L3-N with current in L3 to get 3P4W power
consumption.
The figure shown C1 detects L1 current, the voltage is L1-N.
The figure shown C2 detects L2 current, the voltage is L2-N.
The figure shown C3 detects L3 current, the voltage is L3-N.
4.
The Formula and define of three-phases four-wires synthesized as follows:
V
AVG
(Average voltage)=(V
1
+V
2
+V
3
) /3
PF
EQ
(equivalent PF)=W
T
/VA
T
I
EQ
(equivalent current)=VA
T
/V
AVG
KWH
T
(TOTAL KWH)=KWH
1
+KWH
2
+KWH
3
W
T
(TOTAL W)=W
1
+W
2
+W
3
KVAH
T
(TOTAL KVAH)=KVAH
1
+KVAH
2
+KVAH
3
VA
T
(TOTAL VA)=VA
1
+VA
2
+VA
3
5.
The figure shown C4, C7, C9, C12 detect L1 current, the voltage is L1-N.
