What is the largest single-phase watt-hour meter?

Household single-phase meters are generally 4-5 amps, that is, 4 (5) A. Now, household single-phase meters are generally 40 amps or 60 amps.

Difference between single-phase watt-hour meter and three-phase watt-hour meter;

Single-phase meter can only be connected with live wire and zero wire, and can only provide AC 220V power supply; The three-phase meter can be connected with three live wires and zero wires, which can provide three sets of AC 220V power supply and AC 380V industrial power supply. The three-phase meter can be disconnected from the neutral line. Single-phase watt-hour meter can only measure the electric energy of single-phase circuit. Generally used for single-phase load electric energy metering. Three-phase watt-hour meter can measure the electric energy of three-phase circuit including single-phase circuit. Used for electric energy metering of three-phase and three-phase single-phase mixed loads.

Single-phase meter zero mode: open the wiring end cover and have two special output terminals. Through this instrument, the instrument can be cleared, adjusted and data extracted. Unless you are a power company's meter checker, if you can clear it, you have the ability and right to clear it.

Single-phase watt-hour meter, applied to active energy measurement: high measurement accuracy (1.0), accurate measurement, small modular volume (18mm), and can be easily installed in various terminal distribution boxes. Guide rail installation, bottom wiring, perfect cooperation with miniature circuit breaker. The intuitive and readable mechanical display reduces the risk of data loss due to accidental power failure. No external working power supply is required. Wide operating temperature range.