CN2182480Y

CN2182480Y - Controller for preventing electricity fraudulent use

Info

Publication number: CN2182480Y
Application number: CN 94201358
Authority: CN
Inventors: 刘在能
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-01-06
Filing date: 1994-01-06
Publication date: 1994-11-09
Anticipated expiration: 2004-01-06

Abstract

The utility model relates to a controller for preventing electricity fraudulent use, which is composed of a DC regulated circuit, a controlling circuit, an electronic switch, an actuating mechanism, a signal detection circuit, etc. The signal detection circuit of the controller for preventing electricity fraudulent use comprises three technical proposals. The proposal 1 adopts a zero-sequence current transformer, the proposal 2 adopts two transformers at the front of the meter and at the front of the meter, and the proposal 3 is added with a photoelectric coupler GD and resistor R7 on the basis of the proposal 2. A common feature of the three proposals is that the signal is unbalance caused by the electricity fraudulent use, which is adopted to control. The controller for preventing electricity fraudulent use has the advantages of simple structure, convenient operation, and reliable performance.

Description

Controller for preventing electricity fraudulent use

The utility model belongs to a kind of controller for electric consumption of using, be particularly suitable for being used for stopping various without the electric energy meter metering electricity filching behavior of electricity consumption.

At present, the electricity filching behavior of electricity consumption happens occasionally without the electric energy meter metering, and the electricity filching means that is adopted also is very various.As: stealing before the table, off-balancesheet shunting, dismounting hook etc.Normal supply order has been upset in the generation of these behaviors on the one hand, has also caused enormous economic loss to state and collective simultaneously.Current, though miscellaneous anti-electricity-theft protector has appearred on the market, often unsatisfactory because itself structure and function limit, really do not play its due effect mostly.

The purpose of this utility model is existing anti-electricity-theft protector class device is improved, to design the device that can really stop to show electricity filching behaviors such as preceding stealing, off-balancesheet shunting, dismounting hook.

The utility model mainly comprises the following three kinds of technical schemes based on same inventive concept:

Scheme 1, a kind of anti-electricity-theft control device, has direct current regulation circuit, electronic switch, control circuit, actuator and signal deteching circuit, the output of signal deteching circuit and the input of electronic switch join, the output of electronic switch and the input of control circuit join, actuator comprises relay K, be connected on the output of control circuit, the normally-closed contact K1-1 of relay K is connected on the direct current regulation circuit AC power of ac circuit and takes out the end back, electronic switch is the inverter of being made up of triode VT, its signal deteching circuit comprises zero sequence current mutual inductor T1, with diode VD1, two primary coil L1 of zero sequence current mutual inductor T1, L2 is connected on respectively on the live wire and ground wire of ac power supply circuit, its secondary L3 is electrically connected with diode VD1 one end, and the base stage of the other end of diode VD1 and triode VT is joined.

Scheme 2, other parts are identical with scheme 1, different just its signal deteching circuits, its signal deteching circuit is by instrument transformer T2, T3, diode VD2, VD3 and capacitor C 2 are formed, the primary coil L4 of instrument transformer T2 and the primary coil L6 of instrument transformer T3 are connected on respectively on the live wire of the ac power supply circuit before and after the electric energy meter, the induced signal of secondary coil L5, the L7 of two instrument transformer T2, T3 is respectively by oppositely being superimposed on behind diode VD2, the VD3 on the base stage of triode VT, and capacitor C 2 cross-over connections are between the ground wire of the base stage of triode VT and ac power supply circuit.

Scheme 3, other parts are identical with scheme 2, different just its signal deteching circuits, also have a photoelectrical coupler GD and resistance R 7 in this circuit, the input of photoelectrical coupler GD and resistance R 7 are parallel with one another, the two ends that the two ends of its parallel branch and electric energy meter are inline join, and the output of photoelectrical coupler GD is in parallel with the secondary coil L7 of instrument transformer T3.This programme is the further extension on scheme 2 bases, makes it further possess the electricity filching behavior that prevents to remove the electric energy meter inner hanging hook.

The utility model and existing all kinds of anti-electricity-theft protective devices relatively, have simple in structure, easy to use, cost is low, and advantage such as anti-electricity-theft dependable performance.

Accompanying drawing has provided the be blended together embodiment of the overall technical architecture used of above-mentioned three kinds of schemes.

Fig. 1 is anti-electricity-theft control device electrical schematic diagram

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

A kind of anti-electricity-theft control device, has direct current regulation circuit, electronic switch, control circuit, actuator and signal deteching circuit, the output of signal deteching circuit and the input of electronic switch join, the output of electronic switch and the input of control circuit join, actuator comprises relay K, be connected on the output of control circuit, the normally-closed contact K1-1 of relay K is connected on the direct current regulation circuit AC power of ac circuit and takes out the end back, electronic switch is the inverter of being made up of triode VT, direct current regulation circuit is by instrument transformer T4, rectifier diode VD7-VD10, voltage-stabiliser tube VD6 and filter capacitor C7 form, and signal deteching circuit of the present utility model comprises the combination of following three kinds of schemes:

Scheme 1: its signal deteching circuit comprises zero sequence current mutual inductor T1 and diode VD1, two primary coil L1, the L2 of zero sequence current mutual inductor T1 are connected on respectively on the live wire and ground wire of ac power supply circuit, its secondary L3 is electrically connected with diode VD1 one end, and the base stage of the other end of diode VD1 and triode VT is joined.

Scheme 2: its signal deteching circuit is by instrument transformer T2, T3, diode VD2, VD3 and capacitor C 2 are formed, the primary coil L4 of instrument transformer T2 and the primary coil L6 of instrument transformer T3 are connected on respectively on the live wire of the ac power supply circuit before and after the electric energy meter, the induced signal of secondary coil L5, the L7 of two instrument transformer T2, T3 is respectively by oppositely being superimposed on behind diode VD2, the VD3 on the base stage of triode VT, and capacitor C 2 cross-over connections are between the ground wire of the base stage of triode VT and ac power supply circuit.

Scheme 3: its signal deteching circuit is to increase a photoelectrical coupler GD and a resistance R 7 on the basis of scheme 2, the input of photoelectrical coupler GD and resistance R 7 are parallel with one another, the two ends that the two ends of its parallel branch and electric energy meter are inline join, and the output of photoelectrical coupler GD is in parallel with the secondary coil L7 of instrument transformer T3.

For ease of circuit debugging, can be on the secondary coil L3 of zero sequence current mutual inductor T1 shunt capacitance C1 and potentiometer RP1 simultaneously, the movable end of potentiometer RP1 and diode VD1 join.

Control circuit of the present utility model can adopt ic chip and auxiliary circuit thereof to form; glomeration IC can select the NE555 type for use; and can on its control end 6,7 pin, insert an integrator delay-time circuit of forming by resistance R 6 and capacitor C 6; the delay time of integrator delay-time circuit can be set at the required times of high-grade electrical equipment such as protection refrigerator, as 5-7 minute.

For strengthening deixis of the present utility model, can on the output of control circuit, meet a light-emitting diode VD5 again, light-emitting diode VD5 connects with resistance R 5, to realize the light signal suggesting effect.

Operation principle of the present utility model is as follows:

1, wiring stealing before the table: under the normal condition, the primary coil L4 that flows through instrument transformer T2 equates with size of current among the primary coil L6 of instrument transformer T3, direction is opposite, so pressing also, the electrification among its secondary coil L5, the L7 equates, but because direction is opposite, so its superimposed voltage on the base stage of triode VT is " 0 ", cause VT to end, " 2 " pin of NE555 is a high level, " 3 " pin output low level, and relay K is failure to actuate.

In case the stealing situation takes place, the electric current that then flows through among the L6 of the L4 of T2 and T3 is no longer equal, the base stage of triode VT is a high level, VT conducting, output low level make its " 3 " pin output high level to it " 2 " pin of NE555, relay " K " action, its normally-closed contact K1-1 is disconnected, block power supply circuits, and simultaneously by the luminous indication of light-emitting diode VD5.After electricity filching behavior is got rid of,, behind the delay time that capacitor C 6 is determined, just can restore electricity through resistance R 6.

2, remove the hook stealing: under the normal condition, resistance R 7 is joined the sheet short circuit, the input no-voltage of photoelectrical coupler GD, and its output is open-circuit condition.

In case hook is removed, then resistance R 7 is sealed in the potential winding of electric energy meter, and the voltage of getting approximately about 2V is added on the input of photoelectrical coupler GD, makes its output conducting, near short-circuit condition, make this moment voltage on the secondary coil ∠ 7 of instrument transformer T3 near " 0 ", cause the superposed signal of the L7 of the L5 of T2 and T3 to be positive potential, triode VT saturation conduction, it " 2 " pin of NE555 is a low level, " 3 " pin output high level, ac power supply circuit is blocked in the relay K action.

3, shunting stealing: as carry out off-balancesheet shunting stealing, because the L6 of T3 by short circuit, causes triode VT base potential to raise, thereby make the relay K action by NE555, block ac power supply circuit.

4, a fiery ground stealing: under the normal condition, the size of current that flows through among primary coil L1, the L2 of zero sequence current mutual inductor T1 equates that direction is opposite, and resultant flux be " 0 ", and non-inductive voltage is exported among the secondary coil L3.In case the generation electricity filching behavior then becomes diverter branch by megarelief, cause the current potential size among L1, the L2 unequal, triode VT conducting makes relay K get electronic work by NE555, blocks ac power supply circuit.

Claims

1, a kind of anti-electricity-theft control device, has direct current regulation circuit, electronic switch, control circuit, actuator and signal deteching circuit, the output of signal deteching circuit and the input of electronic switch join, the output of electronic switch and the input of control circuit join, actuator comprises relay K, be connected on the output of control circuit, the normally-closed contact K1-1 of relay K is connected on the direct current regulation circuit AC power of ac power supply circuit and takes out the end back, electronic switch is the inverter of being made up of triode VT, it is characterized in that: signal deteching circuit comprises zero sequence current mutual inductor T1 and diode VD1, two primary coil L1 of zero sequence current mutual inductor T1, L2 is connected on respectively on the live wire and ground wire of ac power supply circuit, its secondary L3 is electrically connected with diode VD1 one end, and the base stage of the other end of diode VD1 and triode VT is joined.

2, a kind of anti-electricity-theft control device: have direct current regulation circuit, electronic switch, control circuit, actuator and signal deteching circuit, the output of signal deteching circuit and the input of electronic switch join, the output of electronic switch and the input of control circuit join, actuator comprises relay K, be connected on the output of control circuit, the normally-closed contact K1-1 of relay K is connected on the direct current regulation circuit AC power of ac power supply circuit and takes out the end back, electronic switch is the inverter of being made up of triode VT, it is characterized in that: signal deteching circuit is by instrument transformer T2, T3, diode VD2, VD3 and capacitor C 2 are formed, the primary coil L4 of instrument transformer T2 and the primary coil L6 of instrument transformer T3 are connected on respectively on the live wire of the ac power supply circuit before and after the electric energy meter, two instrument transformer T2, the secondary coil L5 of T3, the induced signal of L7 is respectively by diode V2, oppositely be superimposed on behind the VD3 on the base stage of triode VT, capacitor C 2 cross-over connections are between the ground wire of the base stage of triode VT and ac power supply circuit.

3, anti-electricity-theft control device according to claim 2, it is characterized in that: signal deteching circuit also has a photoelectrical coupler GD and resistance R 7, the input of photoelectrical coupler GD and resistance R 7 are parallel with one another, the two ends that the two ends of its parallel branch and electric energy meter are inline join, and the output of photoelectrical coupler GD is in parallel with the secondary coil L7 of instrument transformer T3.

4, anti-electricity-theft control device according to claim 1, the secondary coil L3 that it is characterized in that zero sequence current mutual inductor T1 have gone up capacitor C 1 and potentiometer RP1 in parallel simultaneously, and the movable end of potentiometer RP1 and diode VD1 join.

5, according to any described anti-electricity-theft control device among the claim 1-4, it is characterized in that its control circuit is made up of ic chip and auxiliary circuit thereof, ic chip is the NE555 type, is connected to an integrator delay-time circuit of being made up of resistance R 6 and capacitor C 6 on its control end 6,7 pin.

6, according to any described anti-electricity-theft control device among the claim 1-4, it is characterized in that also being connected to a light-emitting diode VD5 on the output of control circuit, light-emitting diode VD5 connects with resistance R 5.