CN1042239A - A kind of device for preventing stealing electricity from electric meter - Google Patents
A kind of device for preventing stealing electricity from electric meter Download PDFInfo
- Publication number
- CN1042239A CN1042239A CN 88105152 CN88105152A CN1042239A CN 1042239 A CN1042239 A CN 1042239A CN 88105152 CN88105152 CN 88105152 CN 88105152 A CN88105152 A CN 88105152A CN 1042239 A CN1042239 A CN 1042239A
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- CN
- China
- Prior art keywords
- electricity
- watt
- hour meter
- burglar
- stealing
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention provides a kind of device for preventing stealing electricity from electric meter, it is on the basis of original table back Anti-electricity-stealing device, has increased the preceding anti-electricity-theft function of table again.Its technical characterictic is, formed bridge balancing circuit by two magnet rings and an adjustable potential meter, one of them magnet ring places the open air, another magnet ring is close to electric degree, when between two magnet rings stealing taking place, has destroyed the balance of bridge balancing circuit immediately, this balancing circuitry is exported a voltage signal immediately, remove to drive executive component and cut off the electricity supply, make anti-stealing electricity function more perfect, be particularly suitable for connecting use to the scattered resident family in rural area.
Description
The present invention relates to the anti-electricity-theft device that a kind of and civilian single-phase watt-hour meter connects use, particularly can prevent showing the protective device of preceding stealing, table back stealing.
Provide a kind of and civilian single-phase watt-hour meter to connect the multi-functional Anti-electricity-stealing device of use by I the Chinese patent CN88216659.X of application.It has functions such as anti-electricity-theft electric leakage, anti-overvoltage, current limliting, in case improper power supply takes place in the loop, can be the good assistant of electric industry management department at 0.04 second internal cutting off power supply.But its limitation is: general scattered resident family, particularly country residents, and the electric wire before the house lead in is lower, and exposed outside, before house lead in, promptly from the electric pole to the ammeter before between stealing be eaily, and the above-mentioned anti-electricity-theft table back that is mainly used in is anti-electricity-theft, and stealing is powerless before the his-and-hers watches.
Show the back electricity filching device before the object of the present invention is to provide a kind of anti-table.
Task of the present invention is achieved in that burglar-proof electric circuit before the input end access table of watt-hour meter, output port at watt-hour meter, insert table back burglar-proof electric circuit, burglar-proof electric circuit is formed a bridge balancing circuit as detecting unit by two reaction magnetic rings and an adjustable potential meter before the table.Power firestreak passes the endoporus of two reaction magnetic rings, insert the input end of ammeter, wherein two reaction magnetic rings are installed in outdoor electric pole and indoor watt-hour meter input end respectively, when stealing or electric leakage take place between two reaction magnetic rings when, difference stream appears in the electric current that flows through two reaction magnetic rings, difference has also appearred in the induced potential in two magnetic ring coil, destroyed the balance of bridge balancing circuit, export a voltage signal, triggered the control utmost point of one-way SCR immediately, the one-way SCR conducting, Chuan Lian electrical apparatus release work with it, driving switch is cut off the electricity supply.
At the output port of watt-hour meter, insert table back burglar-proof electric circuit, this system is by anti-electricity-theft leakage circuit, anti-overvoltage crowbar, after current-limiting circuit is parallel with one another, connect with the control executive circuit form.When improper power supply such as stealing, electric leakage, excess current, superpotential took place behind table, this system can cut off the electricity supply immediately.
The present invention compares with the technology that Chinese patent CN88216659.X provides, and increases the function of the preceding stealing electric leakage of anti-table.Further describe the present invention below in conjunction with accompanying drawing.
Fig. 1 is circuit theory diagrams of the present invention.
Fig. 2 is the stereographic map of reaction magnetic ring.
Referring to Fig. 1.The present invention is divided into two parts from function, and what be connected with the watt-hour meter input end is burglar-proof electric circuit before the table, and power firestreak passes two reaction magnetic ring L that electromagnetic quantities is identical simultaneously
2, L
3Endoporus, be connected with watt-hour meter input end 1, promptly connect, and be connected magnet ring L with an end of potential winding with the current coil of ammeter
2Place outdoor somewhere, on electric pole, magnet ring L
3Must connect airtight with watt-hour meter 1 end, present embodiment is magnet ring L
3After incorporating in the box with table back burglar-proof electric circuit, directly insert under the ammeter.When house lead in arrives ammeter, i.e. two magnet ring L
2, L
3Between when occurring surreptitiously leaking electricity, flow through two magnet ring L
2, L
3Electric current difference stream can appear, difference has also appearred in the induced potential in two magnetic ring coil, at this moment by L
2, L
3, adjustable potential meter R
8The bridge-type balanced bridge of forming occurs uneven, has voltage to produce at a, b point-to-point transmission, by adjustable resistance R
9Make unbalance voltage drop to 0.2 volt, this excites the SCR of one-way SCR immediately
3Trigger electrode on, SCR
3Unidirectional conducting is by electrical apparatus release TK
2Coil, diode D
10, controllable silicon SCR
3Form the loop, electrical apparatus release work, driving switch is cut off the electricity supply.
Work as L
2To L
3Between line destroyed purposely when being cut off, bridge balancing circuit is destroyed equally, feed circuit cut off with regard to eternal protected device like this.
In use, can operate as normal for the check protection device, also designed by resistance R
7With pushbutton switch NK
2The simulation experiment circuit of forming is connected in parallel on the main line.Behind normal power supply, as long as press the button NK
2, shunting has appearred in the power supply main circuit, and the stealing situation is leaked in simulation, and same balancing circuitry is destroyed, electrical apparatus release TK
2Work is cut off the electricity supply immediately.Leak after the stealing situation eliminates, can start the electrical apparatus release TK that resets
2, continue power supply.
In the present embodiment, adjustable potential meter R
8Resistance get 5K Ω, variable resistor R
9Resistance is got 2K Ω, resistance R
7Get resistance 1K Ω.
Referring to Fig. 2, reaction magnetic ring L
2, L
3, internal diameter thick with 0.35mm is that 10mm, external diameter be that the siliconized plate of 16mm builds up highly are 10mm, at color painting wire 50～100 circles of magnet ring cross-sectional direction around φ 0.1mm.
With burglar-proof electric circuit behind the table that the output terminal of ammeter is connected.Concrete connection is: the primary coil of current transformer CT is connected with the output port of watt-hour meter 2, promptly connect with the current coil of ammeter, another winding of the primary electrical circle of current transformer CT is connected with the output port 4 of watt-hour meter, table back burglar-proof electric circuit is seen Fig. 1, its principle of work is identical with the multi-functional Anti-electricity-stealing device that Chinese patent CN88216659.X is provided, and this paper seldom states.
In the present embodiment, reaction magnetic ring L
3Be contained in the box with table back burglar-proof electric circuit, 4 plugs are exposed in the outer end, directly insert under the ammeter.
Claims (3)
1, a kind of and civilian single-phase electric degree connects the preceding table of the table back Anti-electricity-stealing device of use, and it comprises table back burglar-proof electric circuit, it is characterized in that:
A, it also comprise the table before burglar-proof electric circuit, its annexation is: by the reaction magnetic ring L of two same electrical quantity of magnetism
2, L
3, adjustable potential meter R
8Form bridge balancing circuit, power firestreak passes two magnet ring L
2, L
3Endoporus after, be connected electrical apparatus release TK with watt-hour meter input end 1
2Coil, diode D
10With unidirectional controllable silicon S CR
3Series connection, the one end accounts for a shunting of power firestreak, the other end and two magnet ring L
2, L
3Intermediate connection connect controllable silicon SCR
3The control utmost point by variable resistor R
9With adjustable potential meter R
8Centre tap connect controllable silicon SCR
3Negative electrode and power ground short circuit.
The connected mode of b, it and watt-hour meter is: burglar-proof electric circuit inserts the input port 1,3 of watt-hour meter before the table, and table back burglar-proof electric circuit inserts the output port 2,4 of watt-hour meter.
2, according to table back Anti-electricity-stealing device before the described table of claim 1, it is characterized in that: described two identical reaction magnetic ring L
2, L
3Be that, internal diameter thick with 0.35mm is that 10mm, external diameter be that the siliconized plate of 16mm builds up highly are 10mm, at enameled wire 50～100 circles of magnet ring cross-sectional direction around φ 0.1mm.
3, according to table back Anti-electricity-stealing device before the described table of claim 1, it is characterized in that: the power firestreak before the table in the burglar-proof electric circuit passes two reaction magnetic ring L
2, L
3Endoporus after, connect with the current coil of watt-hour meter, and be connected magnet ring L with an end of the potential winding of watt-hour meter
3Pack in the box with table back burglar-proof electric circuit, 4 plugs are exposed in the outer end, directly insert under the watt-hour meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88105152 CN1042239A (en) | 1988-10-27 | 1988-10-27 | A kind of device for preventing stealing electricity from electric meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88105152 CN1042239A (en) | 1988-10-27 | 1988-10-27 | A kind of device for preventing stealing electricity from electric meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1042239A true CN1042239A (en) | 1990-05-16 |
Family
ID=4833380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88105152 Pending CN1042239A (en) | 1988-10-27 | 1988-10-27 | A kind of device for preventing stealing electricity from electric meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1042239A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445578A (en) * | 2011-11-08 | 2012-05-09 | 辽宁省电力有限公司葫芦岛供电公司 | Electricity stealing prevention inspecting and monitoring detector |
-
1988
- 1988-10-27 CN CN 88105152 patent/CN1042239A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445578A (en) * | 2011-11-08 | 2012-05-09 | 辽宁省电力有限公司葫芦岛供电公司 | Electricity stealing prevention inspecting and monitoring detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |