Generally speaking, electric energy meters used to electricity consumption measurement tool, also known as watt-hour meters. The early electric energy meters used the mechanical induction line principle, which has been gradually replaced by electronic circuit meters due to its own power consumption, accuracy and the fact that it is not easy to network. The main components in an electric energy meter include voltage and current pole, rotating aluminum plate, damping magnet, mechanical counter and display, and also includes some other screw accessories for alignment and so on. Many people encounter energy meters and don't know what they mean of parameters above them. The following small to introduction of how to see the model of the energy meter and how to read the units of energy measurement.

I. Name and model of the nameplate

Part I: Category code: D: Energy meters

Part II: group code: the first letter S: three-phase three-wire  T: three-phase four-wire  X: reactive  B: standard  Z: maximum demand  D: single-phase   the second letter  F: multi-rate meter  S: full-electronic  D: multifunction  Y: prepayment

Part III: Design serial number: Arabic numerals

Part IV: Improvement of the serial number: expressed in lowercase hanyu pinyin letters

Part V: Derivative number  T: for both wet and dry heat  TH: for wet heat belt  G: for plateau  H: for general use  F: for chemical corrosion;  K: switchboard type  J: pulse energy meter with receiver

Also marked with ① or ② signs

① represents the accuracy of 1% of the electric energy meter, or Class 1 meter;

② represents the accuracy of the electric energy meter is 2%, or 2 levels of the meter. It also marked with the standard code, manufacturer, trademark and factory number used for the product.

II. How to read the unit of electrical energy measurement  in the meter?

1. Active energy meter kW.h

2. Reactive energy meter kvar.h

Word wheel meter window (LCD window): different colors for whole digits and decimal digits, middle decimal point; each word wheel has multiplication factor (when there is no decimal point)Multi-function meter LCD display has two digits of whole digits and decimal digits.

Accuracy level: Relative error, indicated by the number placed inside the circle

Calibration current and rated maximum current: Calibration current (rated current): marked on the table as the base current value for calculating the load: Ib rated maximum current: electric energy meter can work normally for a long time, the error and temperature rise fully meet the requirements of the maximum current value: Imax rated voltage: single-phase energy meter marked: 220V

Three phase meter has three labeling methods: a. Direct access three-phase three-wire: 3×380V  b. Direct access three-phase four-wire: 3×380/220V

Constant of energy meter: the proportional number of the relationship between the power recorded by the power meter and the number of turntable revolutions or pulses: r/kWh;imp/kWh   rated frequency: 50Hz

The above is all the content of this article, if you want to know more about electric energy meters, please pay attention to this website!