Q
What are the information does digital energy meter displays?
A
What are the information does digital energy meter displays?
This will depend on the meter and many meters have lots of useful information stored in them using registers. Examples are:
1.Total 4 quadrant kVAh, kWh and kVArh billing period and total accumulated
2.Max demand, predicted demand
3.Energy today, yesterday, this week, last week, thus month, last month  etc
4.ToU peak, std off peak and Max demand
5.V,I,pf total and per phase
6.V,I THD and marmionics, symmetrical components.
7.Power energy
8.Harmonics
9.Historical logs (1 week to 2 years depending on memory)
Many meters and their registers may be accessed via modbus for real-time data trending but more complex software is required to retrieve the historical data.
Many "smart meters" are pure used for billing whereas energy management meters may be used for demand control etc but which is normally done separately like pf correction.

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