Overall energy loss not less than 140 last year when the total amount of nuclear power is too watt, for Germany, the only good news is for these nuclear power station will not immediately disappear.

Theoretic analysis and field measurement results indicate that the consumer watt hour should not be the energy consumed actually but the fundamental energy in consideration of harmonic energy loss.

Selecting proper acquisition and communication manner of watt-hour data is one of the important steps for the construction of watt-hour metering system in meticulous line loss management.