An mechanical watt-hour meter is a device that measures and records over time the work done by electric power flowing through a circuit . Although there are several different types of watt-hour meters, each consists essentially of a small electric motor and a counter. Specifications: Brand: Chint Model: DT862-4 Rated voltage: 3X220V/380V Reference frequency: 50Hz Overall size: 272*172*73 (mn) Mounting size: 242*150 (mm) Specified operating temperature: -25℃~+55℃ Ultimate operating temperature: -40℃~+70℃ Power circuit: ac meter Voltage range: 0.8 ~ 1.2Un Rated current: 1.5(6)A, Starting current: 0.5%Ib Package Includes: 1 x Chint Mechanical Watt-hour Meter DT862-4 1.5(6)A