How to choose household electric energy meter

Household electric energy meters are generally single-phase electric energy meters, which are used to measure electricity consumption, and are usually called "electric meters."

The meter capacity is indicated by "A". For example: a 5 amp energy meter, the amount of electricity it can withstand is calculated by the following formula: 5 amps × 220 volts = 1100 watts. In other words: the electricity used by all households in this household cannot exceed 1100 watts. Although the energy meter has the ability to overload for a short period of time, often exceeding the specified load can damage the energy meter. Therefore, the choice of electric energy meter should have appropriate rich capacity. If the electricity consumption of all household electrical appliances is 1100 watts, the watt-hour meter used should be 2-3 times larger, and a power meter of 10 amps or 15 amps should be used. The single-phase electric energy meters commonly used on the market are divided into mechanical and electronic types. Mechanical energy meters such as DD9, DD15, DD862a, etc., have long life, high overload capacity, stable performance, etc. The basic error is affected by voltage, temperature, frequency and other factors, and long-term use loss is large.

The electronic single-phase electric energy is marked with DDS6, DDS15, etc. It adopts special large-scale integrated circuit and has the characteristics of high precision, good linearity, wide dynamic working range, strong overload capability, low energy consumption, small structure and light weight. Work without the need for adjustment and verification, but also anti-stealing, the family should prefer electronic energy meter. With the development of time-sharing power supply methods, the application of time-sharing energy meters has become more and more extensive.

The electric energy meter should be placed in a dry, clean and vibration-free place, and installed on a wooden board of appropriate size and thickness coated with moisture-proof paint. The height of the installation should be no less than 12 meters and no more than 2 meters from the ground. The lead seal on the electric energy meter cannot be removed by itself, because this is the sign that the power supply department can pass the calibration after the electric energy meter is verified.