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8.8 Communication values and actual values
To ensure that the meter keeps adequate accuracy bits when transmitting data, some of the
real-time data registers of PMAC735 adopt some special processing methods, as shown in the
table below:
No.
Content
Communication value
Actual value
1
Per phase/line voltage
Average phase/line voltage
Neutral voltage
Secondary side
Communication value *
calculation factor * PT
2
Per phase current
Average phase current
Neutral current
Current demand /
minimum/maximum value
Secondary side
Communication value *
calculation factor * CT
3
Per phase power
Total power
Power demand
Secondary side
Communication value *
calculation factor * PT *
CT
Using secondary side data to transmit numeric values can maintain the calculation accuracy to the
utmost extent. The user must, during processing, pay attention to the transformation ratios of the
corresponding PT and CT.