Generally speaking, single-phase watt-hour meters are mainly used in residential areas, and three-phase watt-hour meters are mainly industrial power such as industrial parks and factories.
Comparing the performance of the two meters, the single-phase watt-hour meter can only provide AC 220V power supply;The three-phase meter can be connected with three neutral live wires, which can not only provide three sets of AC 220V power supply, but also provide AC 380V industrial power supply.
