Meter

Energy meter, energy meter is used to measure, also known as electric meter ,  fire tables, kilowatt hour meter, refer to the instrument measuring various electrical quantities.
Definition

Designed to measure a certain time period is called the energy accumulated value of the instrument meter, commonly known as the meter, fire tables.
Classification
By purpose: active energy, reactive energy meter, largest scale, the standard power meter, multi-rate time-sharing power meter, prepayment meter (sub-coin, card type,

electric cassette), loss of energy meter , multifunction energy meter and smart meter
According to the principle: induction (mechanical), static (electronic), electromechanical integrated (hybrid)
According to the nature of access to power: AC table and DC table
According to the structure: the overall style, split
Press the access phase: single-phase, three-phase three-wire, three-phase four-wire power meter
According to accuracy class: Normal mounted Electric energy meter (0.2S, 0.5S, 0.2.0.5.1.0,2.0 level) and portable precision energy meter (0.01,0.05,0.2 grade)
According to the installation wiring: direct-access, indirect access type