Zhejiang Tianpusheng Electric Co., Ltd. is one of the largest manufacturers of electric energy meters in Taizhou City, Zhejiang Province, China. One of the products we promote is prepaid kwh meter.

The accuracy requirements of the electric meter include the inspection of current and power factor changes, voltage changes, frequency changes, start-up tests, potential tests, and run-of-the-word tests. Generally, municipal and county-level power supply companies can conduct inspections. Electronic watt-hour meters generally have good linearity within the load range specified in the regulations, but the actual and accurate load ranges of meters from different manufacturers are very different. Because the actual load current on the spot changes frequently, the load that can be accurately measured The wider the range, the better the load performance of the table. In some rural areas, the grid voltage fluctuates greatly. Pay attention to the error of the electric energy meter under the limit of voltage fluctuation. In particular, the light load error at low voltage and whether the energy meter is strong, check that the DC power supply voltage in the meter cannot drop below the working voltage of the meter and the chip, and the ripple of the DC power supply cannot be significantly increased.

The accuracy requirements also include, for example, harmonics, external magnetic induction, and high-frequency electromagnetic field effects.

Introduction of electric energy freeze function of electric energy meter:

Freezing of zero-point electric energy: At the zero crossing each day, the meter can calculate the current rates and total electric energy for forward active power, various rates and total electric energy for reverse active power, various forward reactive power rates and total electric energy, and reverse reactive power at that time. Each rate and total electric energy are frozen, and the time stamp (month. day. hour. minute) at that time is recorded.

Instant electric energy freezing: Broadcast electric energy freezing command through RS485 (only port ①) bus, the meter can calculate the current rate of active power and total electric energy, the rate of reverse active power and total electric energy, and the charge of forward reactive power at that moment. Rate and total electric energy, each rate of reverse reactive power and total electric energy freeze, and record the time mark at that time (month. day. hour. minute).

With the comprehensive advantages of price, quality and technology, our company's products can be seen everywhere. If you are interested in buying our products, please click on the link to contact us: three phase prepaid kwh meter manufacturer. Thinking of you and wishing you a beautiful Christmas season.