CN2158539Y

CN2158539Y - Electricity-stealing-proof device for watt-hour meter without power consumption

Info

Publication number: CN2158539Y
Application number: CN 93215282
Authority: CN
Inventors: 吴涛
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-06-17
Filing date: 1993-06-17
Publication date: 1994-03-09
Anticipated expiration: 2003-06-17

Abstract

The device for preventing fraudulent use of watt-hour meter without power consumption is composed of multi-stage voltage-multiplying rectifying circuit, energy storage circuit, electric larceny identifying circuit, drive circuit and electric larceny punishing circuit, and features that a zero-sequence current transformer is installed in the power supply loop of watt-hour meter. The input end of the zero sequence current transformer is connected with the watt-hour meter, and the output end of the zero sequence current transformer is connected with the multistage voltage doubling rectifying circuit. The device has the outstanding characteristics of no electric energy consumption, long service life, convenient matching with the watt-hour meter and suitability for industrial production.

Description

Electricity-fraudulence-proof arrangement watt-hour meter

The utility model relates to a kind of non-power consumption kilsyth basalt anti-electricity-theft device, belongs to anti-electricity-theft automaton, particularly arrangement on watt-hour meter for avoiding fraudulent use.

By retrieval, present existing arrangement on watt-hour meter for avoiding fraudulent use is a lot, and they adopt various means to prevent the generation of electricity filching behavior from different perspectives, have suppressed the generation of electricity filching behavior effectively.Facts have proved, these devices have many unsatisfactory places, its common drawback: the first has power consumption to exist, and these install once use, will consume certain electric energy and keep work, hundreds of milliwatt at least, one watt to several watts is not waited at most, generally speaking, and in order to prevent stealing, earlier consumed many electric energy in vain, very uneconomical.It two is poor reliability.Because these devices have mostly used a small amount of or a large amount of electronic devices and components, these components and parts directly are connected with alternating circuit (220V), electronic devices and components long-term work heating, aging, cause failure of apparatus, it is unusual that power supply is taken place, cause damage to the user, so that burn the bosom household electrical appliance.Be on the other hand because these devices be will with the watt-hour meter cooperating, and it is long to be nothing like the watt-hour meter life-span its serviceable life, then applies very difficult.

The purpose of this utility model is to be to overcome above-mentioned weak point of the prior art, and provides a kind of not consumed power, electron device not to link to each other with the thermoelectricity loop, long service life, the non-power consumption kilsyth basalt anti-electricity-theft device that reliability is high.

The purpose of this utility model is achieved in that it comprises watt-hour meter, cockcroft-walton voltage multiplier circuit, accumulator, stealing identification circuit, driving circuit, stealing punishment circuit.The output terminal of cockcroft-walton voltage multiplier circuit links to each other with accumulator, the output terminal of accumulator is connected with the stealing identification circuit, the output terminal of stealing identification circuit is connected with driving circuit, the output terminal of driving circuit is connected with stealing punishment circuit, and its special character is to be provided with zero sequence current mutual inductor in the watt-hour meter current supply circuit.The input end of zero sequence current mutual inductor is connected with watt-hour meter, and output terminal is connected with the cockcroft-walton voltage multiplier circuit.

The drawing explanation of accompanying drawing:

Fig. 1 is a block scheme of the present utility model.

Fig. 2 is an electric principle schematic of the present utility model.

Zero sequence current mutual inductor adopts coil winding among the figure, and input end is plugged on the watt-hour meter, and output terminal links to each other with the cockcroft-walton voltage multiplier circuit.The cockcroft-walton voltage multiplier circuit is by D ₁-D ₆And D ₇-D ₁₀Diode is formed, respectively to C ₁₁And C ₁₂Charging, C ₁₁, C ₁₂Form accumulator, R ₁, R ₂Form the stealing identification circuit, relay J ₁Form driving circuit with IC, with relay J ₂Be core, D ₁₂-D ₁₅Rectification circuit and relay J ₂Be connected and form stealing punishment circuit.The utility model is contained in the box body, is plugged on the output terminal of watt-hour meter.

Working routine of the present utility model is: when no electricity filching behavior takes place, the secondary no-output voltage of zero sequence current mutual inductor, entire circuit is not worked, electronic circuit with exchange not crosslinked.When electricity filching behavior takes place, the secondary generation induced potential of zero sequence current mutual inductor, induced potential is through cockcroft-walton voltage multiplier circuit D ₁-D ₆, D ₇-D ₁₀Rectification is boosted and is delivered to accumulator respectively to C ₁₁, C ₁₂Charging, charging back stealing identification circuit, R ₁, R ₂Perceived stealing and taken place, send signal when it surpasses stealing rectification definite value, started drive circuit works, IC overturns, and is turned over by high level to be low level, through C ₁₃Drive triode BG work, trigger the controllable silicon SCR conducting, relay J ₁Adhesive, stealing punishment circuit relay J ₂Adhesive and self-insurance, current supply circuit is through J ₂Normally closed contact disconnects, and stops power supply.Promptly stopped electricity filching behavior.

Compared to existing technology, the utility model has the advantages that: not power consumption, there are not the series of problems such as aging, heating owing to electronic device in the work, the reliability height, long service life, Can with the same life-span of kilowatt-hour meter, power-steeling preventing effect is good, can reach anti-electricity-theft purpose, can not cause unnecessary fault to normal power supply again, device does not have wave distortion, is fit to suitability for industrialized production, is desirable anti-electricity-theft device.

Claims

1, a kind of non-power consumption kilsyth basalt anti-electricity-theft device, the output terminal that comprises watt-hour meter, cockcroft-walton voltage multiplier circuit, accumulator, stealing identification circuit, driving circuit, stealing punishment circuit, cockcroft-walton voltage multiplier circuit links to each other with accumulator, the output terminal of accumulator is connected with the stealing identification circuit, the output terminal of stealing identification circuit is connected with driving circuit, the output terminal of driving circuit is connected with stealing punishment circuit, it is characterized in that being provided with zero sequence current mutual inductor in the watt-hour meter current supply circuit.

2, non-power consumption kilsyth basalt anti-electricity-theft device according to claim 1 is characterized in that the input end of zero sequence current mutual inductor is connected with watt-hour meter, and output terminal is connected with the cockcroft-walton voltage multiplier circuit.