Classification and naming rules of electric energy meters
1. Classification of energy meters
1. According to the principle:
It can be divided into three categories: mechanical electric energy meter, electronic electric energy meter and electromechanical integrated electric energy meter.
The mechanical energy meter is manufactured according to the principle of electromagnetic induction. When the voltage coil is connected to the power supply voltage, the current line passes through the load current, and the magnetic flux generated by the two coils can cause eddy currents on the aluminum turntable. The interaction of the eddy currents and the magnetic flux forms a rotation. Torque to turn the turntable;
Electronic energy meters are instruments that apply voltage and current to solid-state electronic devices and output pulses proportional to watt-hours through electronic devices or special integrated circuits. Therefore, electronic energy meters are also called static energy meters, which are relative to For mechanical watches;
The electromechanical integrated energy meter is a product that transitions from a mechanical watch to an electronic watch. It is a meter that adds a sensor to the turntable of the mechanical watch and accumulates electrical energy through pulses sent by the sensor or performs other processing.
Compared with mechanical meters, electronic energy meters have the following advantages: 1) high accuracy and good error linearity; 2) small size and light weight; 3) long-term work does not need to be adjusted, 4) the function can easily expand other functions, such as Multi-rate, pre-paid, anti-theft, multi-function, centralized meter reading, etc. 5) High cost performance, less affected by raw materials. and many more.
2. According to the nature of the measured circuit current
It can be divided into DC energy meter and AC energy meter.
3. Divide according to the number of phases
It can be divided into two categories: single-phase meter and three-phase meter, among which three-phase meter is divided into three-phase three-wire and three-phase four-wire. The three-phase AC energy meter of our company is divided into active and reactive power according to the measurement object.
Second, the classification and naming rules of electronic energy meters
1. Classification of electronic energy meters:
The single-phase electronic general electric energy meter DDS
electric energy meter DDSF
The single-phase electronic prepaid electric energy meter DDSY
Single Phase Energy Meter DDSD
Single-phase electronic energy meter carrier DDSI
Activated meter DTS / DSS
Three-phase electronic ordinary type (single-rate) energy meter of three-phase electronic type (single rate)
Reactive power meter DXS876 / DXS875
There are reactive power combination tables DTS (X) / DSS (X)
Three-phase electronic double-rate electric energy meter DTSF / DSSF
Three-phase electronic pre-paid electric energy meter DTSY / DSSY
Three-phase electronic multi-function energy meter DTSD / DSSD
2. Naming rules for electronic energy meters:
Note: The first 4 letters are named according to national regulations. The registration number is the product model number applied by each manufacturer to the National Electrotechnical Instrumentation Committee. A manufacturer can apply for multiple numbers, but it is not allowed to be used by other manufacturers after the application, so , By looking at the registration number you can determine which manufacturer the table belongs to.
Example: DTSD876-BF4 represents the BF4 type three-phase four-wire electronic multi-function energy meter of the manufacturer Shenzhen Tairuijie Electronics Co., Ltd.
Another: DTS (X) means three-phase four-wire active and reactive power combination table; DSS (X) means three-phase three-wire active and reactive power combination table, our company DXS876 means three-phase four-wire reactive power table, DXS875 means three-phase three-wire reactive power table;
In order to cooperate with the transformation of the smart grid, the State Grid Corporation has launched the name "Z" at the end; it is used to indicate that the meter is a smart meter;
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