Contactless watt-hour meter

Abstract

A watt-hour meter of contact-free type is prepared as arranging display screen at front surface of shell; setting A / D chip, switch power supply, microprocessor and communication chip in shell; setting pulse line, power supply line and inductor protective case on shell base then setting inductor with circular hole in said case.

Description

technical field [0001] The present invention relates to a watt-hour meter, in particular to a non-contact watt-hour meter for measuring electricity consumption. Background technique [0002] The watt-hour meter is a measuring instrument widely used in homes, hotels, restaurants and all places that require electricity to measure electricity consumption. It is very important for regulating people's behavior of using electricity legally and safely. A traditional watt-hour meter includes: watch case, live wire and ground wire inlet and outlet, current coil, voltage coil, counter, display, etc. The traditional watt-hour meter has multiple contact points because the live wire and neutral wire of the strong current need to pass through the external terminal and the internal connection of the watt-hour meter, which brings hidden dangers to the use safety of the watt-hour meter. For example, the existing single-phase watt-hour meter has 4 contact terminals to connect between the hig...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a non-contact type watt-hour meter, so that there is no direct contact between the cable and the watt-hour meter, thereby overcoming the potential fire hazards, flood hazards, and electricity consumption of the watt-hour meter in the prior art. Disadvantages such as bulky meter, easy to be stolen, the meter cannot work normally at low voltage, and different sizes of meters are required for different current levels.

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