1. Three phase electric meter: A three phase electric meter is an watt-hour meter used to measure the power output (or load consumption) of the power supply in a three-phase AC circuit.
2. Single phase electric meter: Single phase electric energy meter, used in active power measurement.
Two, the characteristics are different
1. Three phase electric meter: light weight, beautiful appearance and advanced technology.
2. Single phase electric meter: No external power supply is required, and the operating temperature range is wide.