Single-phase rail-type energy meter with communication interface

Abstract

A single-phase rail-type electric energy meter with a communication interface, which includes a step-down circuit, a metering unit power circuit, an electric energy metering unit, a single-chip central processing unit, and an electric energy sampling module. The output end of the step-down circuit is connected to the metering unit power circuit, and the metering unit The power supply circuit supplies power to the electric energy measurement unit, and the data sampled by the electric energy sampling module is transmitted to the central processing unit of the single chip microcomputer for data processing after passing through the electric energy measurement unit. It also includes a voltage stabilizing unit, a switching power supply and a communication interface unit. The switching power supply is connected, and the switching power supply supplies power to the central processing unit of the single-chip microcomputer and the communication interface unit respectively, and the communication interface unit completes the mutual data communication between the external equipment and the central processing unit of the single-chip microcomputer. The shell material of the present invention is 3 / 4 less than that of ordinary meters, and the copper material used in its terminals is only 1 / 5 of that of ordinary meters, which reduces the consumption of raw materials, and can manage power consumption through RS485 bus communication, which is in line with energy saving and consumption reduction of electric energy meters development trend.

Description

technical field [0001] The invention relates to the technical field of electric energy meters, in particular to a single-phase guide rail type electric energy meter with a communication interface. technical background [0002] Existing single-phase electronic electric energy meters with communication interfaces are generally large in size, especially when installing electric energy meters, it is difficult to install due to the large occupied area, and the excessive volume leads to serious waste of raw materials, which is not necessary In line with the concept of energy saving and environmental protection. Aiming at the above technical problems, people have designed a rail-type electric energy meter. Compared with the traditional electronic electric energy meter, it has the advantages of ultra-small size and convenient installation. Its volume is similar to that of ordinary air switches. Now it is mainly supplied to foreign markets. However, due to the limitation of the size...

AI Technical Summary

Problems solved by technology

However, due to the limitation of the size of the existing rail-type electric energy meter, most of them have less functions and generally do not have a communication interface.

In particular, the rail-type electric energy meter, which is similar in size to the 1P air switch, cannot place an ordinary transformer in it, and cannot realize the isolation of the 485 circuit from the power grid, which has brought great obstacles to the realization of bus-type meter reading.

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