Measurement Methods
2CMC48001M0201 87 A43/A44
Revision: C User Manual
Illustration The following illustration shows a direct connected single phase meter measuring
the active energy (E) consumed by a load.
Meter
I
L
U
Load
N
1-element metering in a 4-wire system
In 4-wire system the single element metering method only gives correct results
in a balanced system (same voltage, current and power factor in all phases).
This method should not be used for accurate measurement, but can be used
when high accuracy is not needed.
Illustration The following illustration shows single phase metering in a 3-phase system.
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