Although there are many types and models of mechanical kWh meter  also called inductive energy meters, their structures are basically similar. They are composed of measuring mechanism,  mechanical kWh meter   compensation adjustment device and auxiliary components (housing, frame, terminal box, nameplate). The following are several commonly used     .

(1) Long-life electric energy meter. The life of the mechanical electric energy meter in normal use mainly depends on the degree of wear of the lower bearing. Then from the time of putting into use to the basic error of the electric energy meter due to the wear of the lower bearing, the duration between them is the life span of the electric energy meter. The lower bearing of the energy meter has a great influence on the service life of the energy meter.

The bearing structure of modern electric energy meter mainly includes: steel jewelry stone bearing, graphite bearing and magnetic bearing. Jewel bearings It can be divided into single jewel bearings and double jewel bearings. The double gem bearing has less friction and better wear resistance. Magnetic bearings rely on repulsive forces between magnets of the same polarity to suspend the rotating element in space. Magnetic bearings extend the life of the energy meter due to reduced mechanical wear. At present, most of the long-life electric energy meters that have been gradually promoted and applied have mostly adopted a magnetic structure on the bearings.

Ordinary mechanical energy meters use single gemstone bearings, and the service life is generally 5 years. The bearing of the long-life energy meter adopts new materials and technologies such as magnetic bearings, graphite bearings or double gem bearings, which can extend its life to about 10 years.

(2) Wide-range electric energy meter. In recent years, due to the improvement of residents' living standards, the number of installed household appliances has increased day by day, and the capacity is large, but the possibility of simultaneous use is small. If the old single-range energy meter is selected, the rated current is selected to be too large. When the actual load is very small, the operating current may be lower than 10% of the rated current of the energy meter and the measurement is not accurate; otherwise if the rated current of the energy meter is selected to be When household appliances are used at the same time, the energy meter may burn down due to overload. The wide-range energy meter can overcome the above problems, as long as the total current of the household appliances used is within the rated current range of the energy meter

It can be measured safely and accurately. Therefore, the energy meters installed by residents in the transformation of rural and urban power grids are generally long-life and wide-range energy meters. The wide-range energy meter is also called high overload multiple energy meter, and its overload capacity can reach 2 to 4 times. That is, the rated current of this energy meter is not a fixed value, but an elastic range. If the single-phase meter nameplate is marked with: 2.0 level, 220V, 10 (40) A, it means that the overload capacity of the meter is 4 times; when the rated current of the energy meter is within 10 ~ 40A, the accuracy can still meet the requirements of 2.0 . And the general electric energy meter of grade 2.0, 220V, 10A, its overload capacity is generally only 1.5 to 2 times.

Zhejiang Tepsung Electric Meter Co.,Ltd. . is a professional China manufacturer and supplier of mechanical kWh meter . We have established a mature and professional team in the design, production and sales of electric meters. Welcome to consult and order: https://www.yhddb.com/product/electromechanical-kwh-meter/