CN2399732Y

CN2399732Y - High sensitive self-breaking memory single-phase watt-hour meter anti-fradulence device

Info

Publication number: CN2399732Y
Application number: CN 97221766
Authority: CN
Inventors: 谭尚毅
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-07-16
Filing date: 1997-07-16
Publication date: 2000-10-04
Anticipated expiration: 2007-07-16

Abstract

The utility model relates to an anti-fraudulent electricity device which automatically cut off power supply and sends alarm to a plurality of common fraudulent electricity methods from electricity meters; a sensor (a three-winding current transformer) and a circuit board are arranged at the space of the existing single-phase watt-hour meter. When in normal electricity use, a voltage but no current is circulated on the circuit board and the sensor does not generate alternating flux; thus, the metering of the electricity meter is not influenced and the electricity meter is not added with load. When users do fraudulent electricity form the electricity meters, the different fraudulent electricity methods all trigger a thyristor so that the thyristor is communicted; then, the circuit sends alarm, and a relay automatically cuts off and then a power supply circuit is cut off; the circuit does not be in a normal state until a general supply switch of the next higher level is switched on.

Description

The highly sensitive memory-type single-phase watt-hour meter device against charge evasion of autotomying

The utility model relates to a kind of device against charge evasion of the single-phase watt-hour meter of packing into

It is investigated that the Chinese patent newspaper has the anti-electricity-theft single-phase watt-hour meter patent of power punishment type, its function is after detecting user's stealing, ammeter is had good luck add fast again, so 1. can not prevent user's stealing at once, alleviate the electrical network heavy burden, but the 2. broken new move of opposing electricity-stealing of user's repetition test, 3. electric supply meter is had good luck at a high speed to wear and tear and is aggravated, and influences the ammeter life-span, and 4. ammeter is had good luck and is doubled than actual amount, the user goes back on one's word, and the electricity-management personnel can be besieged.

The purpose of this utility model provides a kind of device against charge evasion, and it can detect the user when adopting one of several frequently seen stealing gimmick to carry out the technology stealing from ammeter, cuts off the power supply at once and reports to the police, and makes the stealing family can't continue electricity consumption and is disclosed exposure.

This device can be anti-following four kinds common from table stealing gimmick (account for 90% stealing may).Referring to four kinds of common stealing gimmick brief introduction figure of Fig. 1 (a)～(e).

1 change live wire ground wire inlet wire after, the load loop line is ground wire in addition, ammeter is not had good luck, the total power stealing.

2 decoupling devices, outage line ball circle is not had good luck ammeter, the total power stealing.

3 short circuit current coils (can insert the short circuit lead from the bottom up) stealing half, the ammeter rotating speed reduces by half, the half-power stealing.

4 change current coil two inlet wires makes the ammeter counter-rotating, doubles stealing.

All old-fashioned stem-winders (as the DD28 type) and novel table (DD862 type) are put into this device all can anti-above-mentioned 1～4 kind of common stealing gimmick.

As long as advancing this device, string can make them increase the more effective function of opposing electricity-stealing (even no-voltage coil also can be anti-above-mentioned 1,3,4 three kind of common stealing gimmick) to the new-type table of any no-voltage coil such as electronic type, magnetic card type, multiple rate formula table.

The purpose of this utility model is to realize (putting into the single-phase watt-hour meter key wiring diagram of device against charge evasion referring to accompanying drawing 2) like this, this device is installed in existing machinery and has good luck in the single-phase watt-hour meter, and it is made up of three winding current mutual inductors, hummer and a packaged circuit board by the relay of autotomying, thyristor, current-limiting resistance, commutation diode, light emitting diode and rectifier bridge and little relay circuit.It is characterized in that: big electric current side one winding of current transformer is serially connected with current coil in electric meter; Another big electric current winding replaces 4～No. 5 end short circuit sheets in the ammeter after being connected in series the relay normally closed interlock of autotomying; The little electric current side of current transformer winding is connected to gate circuit transistor gate and negative electrode through commutation diode, filter capacitor.From No. 1 live wire end to 4 of ammeter ground terminal be connected to hummer, commutation diode successively, the relay of autotomying, thyristor and current-limiting resistance.Autotomy relay coil and be connected to filter capacitor and light emitting diode and dropping resistor; Hummer also is connected to electric capacity and resistance.At No. 1,2, ammeter end and be connected to anti-decoupling device rectifier bridge and little relay circuit, little relay coil also is connected to filter capacitor and voltage stabilizing diode.From as seen the autotomy power supply of relay of accompanying drawing 2 is that power taking table primary voltage is through half-wave rectification, resistance step-down, control its break-make by thyristor.As normal electricity consumption, J1 never electric adhesive, thyristor can conducting, can not influence ammeter and have good luck, and has the bridge rectifier of anti-decoupling device stealing and relay circuit to detect link as outage line ball circle at the end string of going into of potential winding.Power-steeling quantity detects link and is finished by sensor (three winding current mutual inductors) CB, normal electricity consumption, there is not alternating flux among the CB, the non-inductive electromotive force of secondary, only desire to make ammeter (adopt the 1st, 3, the 4 kind of stealing gimmick) secondary of having good luck when undesired just to have induced potential to remove to trigger thyristor, make the relay adhesive of autotomying, realize cutting off main circuit and report to the police more than the user, up to a deciliter upper level total power switch once just can return to normal (user must abandon the stealing effort, otherwise also will autotomy and report to the police).

Owing to adopt such scheme, the utility model can be anti-above-mentioned four kinds commonly from show, carry out technology stealing gimmick, can realize 1. making stealing to cannot succeed, really alleviate the electrical network heavy burden, reduce disaster hidden-trouble, 2. do not influence ammeter and have good luck, do not increase the ammeter load, 3. the user stretches out one's hand stealing and just is de-energized, can't the broken new move of originally opposing electricity-stealing of repetition test, 4. oppose electricity-stealing move after, the user must ask the electricity-management personnel to forgive, so in case use, the electricity-management personnel will be welcome, well-behaved user expresses one's gratification.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is four kinds and commonly sees stealing gimmick brief introduction figure.

Fig. 1 (a) is the machinery single-phase watt-hour meter standard connection of having good luck.IM is a current coil in electric meter, and UM is the ammeter potential winding, and BD is a user load.

Fig. 1 (b) is a line one a ground stealing method, the user after exchanging table fire, ground wire, and indoor with heavy load loop line reconfiguration to water pipe or steam heating pipe, ammeter is not had good luck, the total power stealing.

Fig. 1 (c) is for plucking potential winding test hook stealing method, because UM is de-energized, ammeter is not had good luck, the total power stealing.

Fig. 1 (d) is a short circuit current coil stealing method, user's short circuit copper cash of can pegging graft from the bottom up from the ammeter bottom since the outer lead shunting approximately half, rotating speed reduces by half so ammeter is had good luck, the half-power stealing.

Fig. 1 (e) is for changing current coil two inlet wire stealing methods, because electric current antiphase among the IM is had good luck ammeter in the other direction, therefore genus doubles stealing.

Fig. 2 is for putting into the single-phase watt-hour meter key wiring diagram of device against charge evasion, and except that sensor CB, other element all is welded on a circuit board.For reducing cost hummer FM and the voltage regulation resistance R in parallel with it ₃With filter capacitor C ₄Can exempt from dress (solder joint short circuit).

During normal electricity consumption, the former limit two winding N1 of CB and the magnetic potential IN1 of N2 and IN2 opposite sign but equal magnitude and all offset, so do not have alternating flux in the iron core, no core loss, do not generate heat, the non-inductive electromotive force of N3 winding, thyristor T can not get enough trigger currents and can not open, the J1 feed circuit are obstructed, the normally closed interlock of J2 is cut off electric, cut off the potential winding power supply simultaneously, the ammeter power supply is reduced, LED is bright simultaneously, to show warning, when the user adopts the 1st, 3, when 4 kinds of stealing gimmicks are carried out stealing, the magnetic potential of N1 and N2 can not offset, so alternating flux is arranged among the CB, the N3 winding has induced potential, only need power-steeling quantity big (less than 5% rated current) slightly, gate circuit transistor gate obtains enough big trigger current and the conducting and (memory) this state of keeping make relay J 1 adhesive of autotomying, and the power supply and report to the police incessantly of autotomying can not be restored (as long as 220V is arranged) even change back normal electricity consumption, overstepping one's bounds unification level total power switch once can return to normal, make the electricity filching person stealing not become counter being de-energized like this, otherwise at one's wit's end, or offend public wrath and go La Zongzha once, if electricity management department locks total lock, electricity filching person must be ready to pay the penalty submit.

In embodiment illustrated in fig. 2, mutual inductor CB system is wound with the silicon sheet core coil of three windings, N1, N2 is 2 windings of the mutual equal turn numbers of big electric current side, N1 seals in one of meter current coil, N2 string is autotomyed and is replaced No. 4 behind the relay normally closed interlock, former ammeter short circuit sheet between No. 5, N3 is little electric current side boosting winding, when user's stealing causes IN1 and IN2 magnetic potential and can not offset, N3 may obtain to be enough to trigger the signal of thyristor T, the anode series of T has the half-wave rectification diode of receiving 220V live wire end and the relay J 1 of autotomying, and (and capacitor C 1 is in case inhale shakiness, string R1, LED does the indication of reporting to the police).The negative electrode string of T has dropping resistor R2 (in case relay is overheated), and R2 receives the 220V ground terminal through N2.No. 1, No. 2 terminations bridge rectifier and J2 relay (and the anti-shakiness of inhaling of C3 that prevents user's decoupling device (stealing of outage line ball circle) arranged, and stabilivolt WY prevents the J2 overtension), it is open-minded that the normally open contact of J2 can make the T oneself trigger, and makes J1 get electric adhesive and the ammeter of autotomying power supply.

Claims

1. highly sensitive memory-type single-phase watt-hour meter device against charge evasion of autotomying; It is installed in existing machinery and has good luck in the single-phase watt-hour meter, and it is made up of three winding current mutual inductors, hummer and a packaged circuit board by the relay of autotomying, thyristor, current-limiting resistance, commutation diode, light emitting diode and rectifier bridge and little relay circuit; It is characterized in that: big electric current side one winding of current transformer is serially connected with current coil in electric meter; Another big electric current winding replaces (4 * 5) number end short circuit sheet in the ammeter after being connected in series the relay normally closed interlock of autotomying; The little electric current side of current transformer winding is connected to gate circuit transistor gate and negative electrode through commutation diode, filter capacitor, from ammeter (1) number live wire end to (4) number ground terminal be connected to hummer, commutation diode successively, the relay of autotomying, thyristor and current-limiting resistance; Autotomy relay coil and be connected to filter capacitor and light emitting diode and dropping resistor; Hummer also is connected to electric capacity and resistance; At ammeter (1) (2) number end and be connected to anti-decoupling device rectifier bridge and little relay circuit; Little relay coil also is connected to filter capacitor and voltage stabilizing diode, in case user's stealing, this device can cut off user power supply and keep this state and once just can lose the memory of promptly up to deciliter upper level total power switch and return to normal.

2. according to the described highly sensitive memory-type single-phase watt-hour meter device against charge evasion of autotomying of claim 1, it is characterized in that exempting to adorn the audible alarm link and be in order to reduce production costs hummer and and connecting resistance, electric capacity exempt from dress, solder joint is by short circuit; Other connection and apparatus function are all described with claim 1; Be that this device is installed in existing machinery and has good luck in the single-phase watt-hour meter, it is made up of three winding current mutual inductors and a packaged circuit board by the relay of autotomying, thyristor, current-limiting resistance, commutation diode, light emitting diode and rectifier bridge and little relay circuit; It is characterized in that: big electric current side one winding of current transformer is serially connected with current coil in electric meter; Another big electric current winding replaces (4 * 5) number end short circuit sheet in the ammeter after being connected in series the relay normally closed interlock of autotomying; The little electric current side of current transformer winding is connected to gate circuit transistor gate and negative electrode through commutation diode, filter capacitor, from ammeter (1) number live wire end to (4) number ground terminal be connected to commutation diode successively, the relay of autotomying, thyristor and current-limiting resistance; Autotomy relay coil and be connected to filter capacitor and light emitting diode and dropping resistor; At ammeter (1) (2) number end and be connected to anti-decoupling device rectifier bridge and little relay circuit; Little relay coil also is connected to filter capacitor and voltage stabilizing diode, in case user's stealing, this device can cut off user power supply and keep this state and once just can lose the memory of promptly up to deciliter upper level total power switch and return to normal.