Multi-electricity-stealing-prevention ammeter

Abstract

The present invention discloses a multi-electricity-stealing-prevention ammeter. The ammeter comprises a circuit board, an electricity-stealing-prevention ammeter housing, a magnetic field electricity-stealing-prevention device and a current balance detection device. An electric energy measurement module is installed on the circuit board, the electricity-stealing-prevention ammeter housing is formed by a bottom housing and an ammeter cover, and the bottom housing and the ammeter cover are in sealing connection in an ultrasonic welding mode; the magnetic field electricity-stealing-prevention device comprises a magnetic field intensity sensor, the magnetic field intensity sensor is installed on the circuit board and is connected with the electric energy measurement module; the current balance detection device comprises a manganin sampling resistor installed on a live wire and a current transformer installed on a zero line, and the manganin sampling resistor and the current transformer are connected with the electric energy measurement module; and the electric energy measurement module comprises an HT5017 measurement chip, and the circuit board and the magnetic field electricity-stealing-prevention device are installed in the electricity-stealing-prevention ammeter housing. The multi-electricity-stealing-prevention ammeter can comprehensively and effectively avoid and detect mostof electricity stealing through adoption of four electricity-stealing-prevention means, and therefore, stable measurement of an ammeter is protected to the maximum extent.

Description

technical field [0001] The invention relates to the technical field of electric meters, in particular to a multiple anti-stealing electric meter. Background technique [0002] With the continuous development of electronic technology and the continuous increase of household appliances, the electricity consumption of residents is increasing. Driven by economic interests, the phenomenon of electricity theft is also increasing. Stealing electricity not only brings economic loss to the power supply unit and the country, but also disrupts the order of power supply, and at the same time poses potential safety hazards. [0003] In the design of traditional electronic energy meters, only the voltage between the incoming line and the neutral line and the current flowing through the live line are used as the basis for energy measurement, which is easy to steal electricity. There are also some stealing methods that are easy to operate, but difficult to detect effectively. [0004] At ...

AI Technical Summary

Problems solved by technology

Stealing electricity not only brings economic losses to the power supply unit and the country, but also disrupts the order of power supply, and there are potential safety hazards at the same time

[0003] In the design of traditional electronic energy meters, only the voltage between the incoming line and the neutral line and the current flowing through the live line are used as the basis for power measurement, which is easy to steal electricity

There are also some stealing methods that are easy to operate, but difficult to detect effectively

[0004] At present, the anti-stealing technology of electronic energy meters is becoming more and more important in the energy meter industry, but driven by interests, the methods of stealing electricity are becoming more and more concealed and diversified. For example, the design of the watch case or electric energy meter box leads to electricity theft Stealing behaviors that can be exploited by those who take advantage of them, magnetic field interference stealing behaviors, adding extra wires and bypassing partial currents, and various stealing methods make a single anti-stealing technology seem powerless

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