Amprobe ACD-30P Clamp-On-Power-Meters - Manual (Page 10)

9
●Measuring 3-Phase 4-Wire (3 4W) Power Parameters:
In both un-balanced and balanced load cases, 3-Phase 4-Wire (3
4W) systems,
measure the phase-to-neutral powers kW
1,
kW
2
and kW
3
of each phase separately as
illustrated. System (total) power kW
Total
is the summation of all three phase-to-neutral
powers. That is:
kW
Total
= kW
1
+ kW
2
+ kW
3
(for both un-balanced and balanced load cases)
In balanced load cases, 3-Phase 4-Wire (3 4W) systems, the system (total) power
parameters can be simplified to three times of any of the phase-to-neutral powers. That
is:
kW
Total
= 3 x kW
1
(for balanced load cases only)
kVA
Total
= 3 x kVA
1
(for balanced load cases only)
kVAR
Total
= 3 x kVAR
1
(for balanced load cases only)