CN2329971Y - Multifunctional device for avoiding fraudulent use of electricity - Google Patents

Abstract

The utility model relates to a multifunctional device for avoiding fraudulent use of electricity. Most of the existing devices for avoiding fraudulent use of electricity have the defects of complicated structure, high cost, poor anti-interference capability, etc., so the creepage phenomenon always occurs in the use of electricity, electric energy loss is caused, and the human casualty accidents by electric shock occur. The utility model is composed of a zero sequence current detection circuit, a filtering execution circuit and a delay circuit, and has the advantages of simple structure, flexible usage, convenient installation, no effect on the errors of the watt-hour meter and high anti-interference capability. Simultaneously, the utility model has the functions of preventing various actions of electric larceny, electric leakage and electric shock. The device can be applied to a single-phase watt-hour meter and also to a three-phase three-wire or three-phase four-wire system watt-hour meter.

Description

Multifunction device for prevention of electricity-stealing

The utility model relates to the improvement of anti-electricity-theft device, belongs to the power supply equipment.

The stealing electricity phenomenon of various means remains incessant after repeated prohibition, and causes the tremendous economic loss to country, and the anti-electricity-theft device of existing various ways mostly exists deficiencies such as complex structure, cost height, poor anti jamming capability.Simultaneously, leaky in electric process, also often occurs, cause energy loss, even the electric shock human casualty accident takes place.

It is flexible that the purpose of this utility model provides a kind of use, easy for installation, to not influence of electric energy meter error, has the multifunction device for prevention of electricity-stealing that prevents various stealings, electric leakage, electric shock function.

The utility model is made up of several parts such as zero sequence current signal testing circuit, filtering executive circuit, power circuit, delay circuits.When stealing, electric leakage or personal electric shock phenomenon take place when, the zero sequence current signal testing circuit produces voltage signal control filtering executive circuit and disconnects the mains supply circuit, moment power supply again after a period of time of stopping power supply, not changing that continuing intermittently has a power failure and make electricity filching person as states such as stealings can't electricity consumption, remind the electric consumer to investigate and prosecute leaky or make electric shock person out of danger, reaches the purpose that prevents various stealings, electric leakage, electric shock.

Accompanying drawing 1 is a principle of work block scheme of the present utility model.Fig. 2 is the structural representation of a kind of embodiment of the utility model.Fig. 3 is the electric circuit diagram of a kind of embodiment of the utility model.Among the figure: 6 zero sequence current signal testing circuits, 7 filtering executive circuits, 8 power circuits, 9 delay circuits, 10 circuit boards, 11 current transformers, 12 electric wiring boxes, 13 relays, 13 ' relay coil, 14 controllable silicons, 15 electrical network live wire incoming lines, 16 electric energy meter live wire incoming lines, 17 electrical network zero line incoming lines, 18 electric energy meter zero line incoming lines, 19,21 electricity consumption output lines, 20 electric energy meter live wire output lines, 22 electric energy meter zero line output lines, 23 electric energy meters, 1 electrical network hot terminal, 4 electrical network zero line connection terminals, 3,5 electricity consumption load wiring terminals, 1 ' electric energy meter hot terminal, 4 ' electric energy meter zero line connection terminal, 3 ', 5 ' electric energy meter load wiring terminal, 24 power supply grid live wires, 25 power supply grid zero lines, 26 use electric line, and 27 use electric loading.The electronic component detail is as follows among Fig. 2 embodiment: D ₁-D ₁₀1N4007, R ₁100K, R ₂1K, R ₃5K, c ₁1000 μ F/470V, C ₂1 μ F/25v, C ₃1 μ F/25V, controllable silicon MCR100-6, relay J QX-13F, current transformer 100mA/0.7V.

Below in conjunction with accompanying drawing the utility model is further described.

This multifunction device for prevention of electricity-stealing is made up of zero sequence current signal testing circuit (6), filtering executive circuit (7), power circuit (8), delay circuit (9), electrical network live wire incoming line (15) and relay (13) normally closed contact J ₁D end connect normally closed contact J ₁C end connect electric energy meter live wire incoming line (16) after passing current transformer (11) primary side; Electrical network zero line incoming line (17) and another normally closed contact of relay J ₂F end connect normally closed contact J ₂E end connect electric energy meter zero line incoming line (18) after passing the current transformer primary side; Electricity consumption output line (19) is connected with electric energy meter live wire output line (20); Another electricity consumption output line (21) is connected with electric energy meter zero line output line (22); Electrical network live wire incoming line, electrical network zero line incoming line respectively with bridge rectifier D ₁-D ₄Input end connects, bridge rectifier D ₁-D ₄Cathode output end is succeeded electric apparatus coil (13 ') end, another termination controllable silicon (14) positive pole of relay coil, controllable silicon negative pole and bridge rectifier D ₁-D ₄Negative pole connects, relay coil shunt capacitance C ₁Current Transformer Secondary side a end and diode D ₁₀Negative pole connects, diode D ₁₀Positive pole and capacitor C ₃One end, controllable silicon negative pole connect, Current Transformer Secondary side b end and capacitor C ₃The other end, controllable silicon trigger electrode connect; Relay two normally closed contact J ₁, J ₂C, e the end respectively with another bridge rectifier D ₆-D ₉Input end connects, bridge rectifier D ₆-D ₉Positive pole and resistance R ₁One end connects, resistance R ₁The other end and parallel resistor R ₂, capacitor C ₂One end connects, resistance R ₂, capacitor C ₂The other end and bridge rectifier D ₆-D ₉Negative pole connects, resistance R ₁The other end is simultaneously through resistance R ₃, diode D ₅Series connection back and relay normally open contact J ₃G end connect normally opened contact J ₃H end be connected with the controllable silicon trigger electrode.

This multifunction device for prevention of electricity-stealing can be made into stand-alone product and the corresponding connection of existing connection box of electric energy meter terminal, and power supply grid live wire (24), power supply grid zero line (25) and load are connected in this device with electric line (26) and get final product with the corresponding connection terminal of electric energy meter.Also can be contained in to form in the electric energy meter and have electric energy meter anti-electricity-theft, that leak electricity, get an electric shock.

Fig. 2 provides and is contained in structural representation of the present utility model in the electric energy meter, and the electric wiring box (12) of current transformer, relay, connection electronic component etc. all is contained on the circuit board (10).Circuit board can be packed in the electric energy meter, disconnects the line 28 on electric energy meter hot terminal (1 '), and line 28 is connected with electric energy meter live wire incoming line (16), and electrical network live wire incoming line (15) is connected with electric energy meter hot terminal (1 '); Remove in flakes 30 on electric energy meter zero line connection terminal (4 '), the electric energy meter load wiring terminal (5 '), electric energy meter zero line incoming line (18) is connected with electric energy meter load wiring terminal (5 '), electrical network zero line incoming line (17) is connected with electric energy meter zero line connection terminal (4 '), electric energy meter potential winding wiring 29 is connected with electric energy meter load wiring terminal (5 '), can form electric energy meter anti-electricity-theft, that leak electricity, get an electric shock.

Fig. 3 provides the electric circuit diagram of the present utility model that can be contained under the existing electric energy meter.In using electric process, adopt mode stealings such as short circuit electric energy meter current coil, zero line ground connection as the electric consumer, or situations such as useful electrical leakage, electric consumer's electric shock take place, all can make and pass the electric current generation difference that flows through in two leads of current transformer primary side, make Current Transformer Secondary side output terminal a, b produce voltage signal, this signal is through diode D ₁₀, capacitor C ₃Trigger the controllable silicon conducting behind the filter rectification, at this moment through bridge rectifier D ₁-D ₄Supply with relay coil after the rectification and make relay work, normally closed contact J ₁, J ₂Disconnect, stop power supply.Simultaneously, normally opened contact J ₃Closure makes delay circuit connection work, through bridge rectifier D ₆-D ₉After the rectification, through resistance R ₁, R ₂Dividing potential drop is given capacitor C ₂Charging, C ₂Through R ₃, D ₅, J ₃Discharge is kept the controllable silicon conducting and is used electric line to continue outage about 5 seconds about 5 seconds.Work as C ₂Behind the discharge off, controllable silicon ends, and relay quits work, normally closed contact J ₁, J ₂Closure restores electricity with electric line.Do not change as states such as stealings, with electric line will have a power failure by 5 seconds (is about 5 seconds by the present embodiment component parameters), moment power cycles go down, make whole can't normal power supply with electric line, make electricity filching person can't continue electricity consumption.As belong to electric leakage, electric shock situation and take place then to play the reminding alarm effect, operating a switch immediately stops power supply checks and gets rid of leaky or make electric shock person out of danger.C ₃Effect be clutter in the filtering current transformer output voltage, guarantee the antijamming capability of this device.

The utility model is simple in structure, easy for installation, reliable in function, and antijamming capability is strong, does not influence the electric energy meter error in dipping, both can be applicable on the single-phase electric energy meter, also can be applicable on phase three-wire three, the three-phase quadriphase system electric energy meter.

Claims (1)

1, multifunction device for prevention of electricity-stealing is characterized in that: be made of electrical network live wire incoming line (15) and relay (13) normally closed contact J zero sequence current signal testing circuit (6), filtering executive circuit (7), power circuit (8), delay circuit (9) ₁D end connect normally closed contact J ₁C end connect electric energy meter live wire incoming line (16) after passing current transformer (11) primary side; Electrical network zero line incoming line (17) and another normally closed contact of relay J ₂F end connect normally closed contact J ₂E end meet electric energy meter zero line incoming line ⒅ after passing the current transformer primary side; Electricity consumption output line (19) is connected with electric energy meter live wire output line (20); Another electricity consumption output line (21) is connected with electric energy meter zero line output line (22); Electrical network live wire incoming line, electrical network zero line incoming line respectively with bridge rectifier D ₁-D ₄Input end connects, bridge rectifier D ₁-D ₄Cathode output end is succeeded electric apparatus coil (13 ') end, another termination controllable silicon (14) positive pole of relay coil, controllable silicon negative pole and bridge rectifier D ₁-D ₄Negative pole connects, relay coil shunt capacitance C ₁Current Transformer Secondary side a end and diode D ₁₀Negative pole connects, diode D ₁₀Positive pole and capacitor C ₃One end, controllable silicon negative pole connect, Current Transformer Secondary side b end and capacitor C ₃The other end, controllable silicon trigger electrode connect; Relay two normally closed contact J ₁, J ₂C, e the end respectively with another bridge rectifier D ₆-D ₉Input end connects, bridge rectifier D ₆-D ₉Positive pole and resistance R ₁One end connects, resistance R ₁The other end and parallel resistor R ₂, capacitor C ₂One end connects, resistance R ₂, capacitor C ₂The other end and bridge rectifier D ₆-D ₉Negative pole connects, resistance R ₁The other end is simultaneously through resistance R ₃, diode D ₅Series connection back and relay normally open contact J ₃G end connect normally opened contact J ₃H end be connected with the controllable silicon trigger electrode.

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