CN2630861Y - Electric field capacitation type power line failure indicating device - Google Patents
Electric field capacitation type power line failure indicating device Download PDFInfo
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- CN2630861Y CN2630861Y CN 03234588 CN03234588U CN2630861Y CN 2630861 Y CN2630861 Y CN 2630861Y CN 03234588 CN03234588 CN 03234588 CN 03234588 U CN03234588 U CN 03234588U CN 2630861 Y CN2630861 Y CN 2630861Y
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- circuit
- electric field
- capacitation
- executive
- winding
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Abstract
An electric field capacitation type indicating device of a power line fault relates to a device which is of hanging arrangement on the power line and is used to indicate the power line fault, which comprises a magnetic induction type power supply, an electric field capacitation circuit, a sampling circuit, an executive circuit which is connected to the sampling circuit and a signal disk type displaying part which is connected to the executive circuit. The electric field capacitation circuit comprises an electromagnetic isolation metal disk, a rectifier which is connected between an iron core of the magnetic induction type power supply and the metal disk and two energy dumped capacitors which are of parallel connection to the rectifier, and the sampling circuit comprises a strip magnetizer T[2] and a T[3] which are separately wound around by a winding RZ[2] and a RZ[3], a short-circuit current judging circuit which is connected between the winding RZ[2] and the input of the executive circuit and a single-phase grounding fault current judging circuit which is connected between the winding RZ[3] and the input of the executive circuit.
Description
Technical field
The utility model relates to a kind of device that is mounted on the indication feeder line fault on the power circuit.
Background technology
Existing a kind of electric power line fault indicator that is mounted on the power circuit, by a magnetic inductive power supply that can be mounted on the line of electric force, the sampling processing circuit, executive circuit and the signal disc type display part formation of joining with executive circuit, capture the fault current signal by the sampling processing circuit, pass to executive circuit drive signal dish and turn to the indicating fault state.The shortcoming one of this fault detector is that its power supply of supplying with internal electric energy partly is to be obtained after rectification by the electric current of power circuit load current by the current transformer induction, this power supply supply mode has a serious limitation, because though many power circuits and power equipment are charged, but belong to stand-by state, there is no load current, fault detector can not obtain power supply and enter duty at this moment.For overcoming this shortcoming, indicator inside also need be equipped with powered battery.Because fault detector is to be mounted on the high aerial power circuit to use, it is very inconvenient that the running down of battery or the bad back of being deteriorated are changed.In addition,, there is the magnetic saturation nonlinear distortion question, influenced the accuracy of signal source because employing is the current transformer formula sensing element with closed magnetic circuit.
The utility model content
The purpose of this utility model is the above-mentioned shortcoming that overcomes existing fault detector, a kind of electric field energy obtaining type feeder line fault indicating device is provided, this device is gathered the electrical potential energy of high-voltage electric field, need not electric current and flows through and can obtain reliable source of power and guarantee in working order always.
The technical scheme that realizes the utility model purpose is, utilizes indicating device to mount the electric potential gradient of high-voltage alternating electric field existence a little, carries out electric energy acquisition and is used for power electronics to indicating device inside.Concrete formation comprises the magnetic inductive power supply that is mounted on the line of electric force, sample circuit, be connected to the executive circuit and the signal disc type display part that is connected to executive circuit of sample circuit, feature of the present utility model is: a), described accident indicator also is provided with an electric field capacitation circuit, described electric field capacitation circuit is by the electromagnetic isolation metal dish in the iron core external magnetic field that is located at the magnetic inductive power supply, rectifier and two storage capacitors that are connected to rectifier output end of being connected between this iron core and the electromagnetic isolation metal dish constitute, and the output terminal of described magnetic inductive power supply after storage capacitor and executive circuit input end in parallel with the rectifier output end of electric field capacitation circuit join; B), described sample circuit is by being wound with winding RZ respectively near two of line of electric force setting
2, RZ
3Bar shaped magnetic conductor T
2, T
3, be connected in winding RZ
2And the short-circuit current judging circuit between the executive circuit input end, be connected in winding RZ
3And the single-phase earth fault current judging circuit between the executive circuit input end constitutes.
Principle of work of the present utility model is as follows:
The work energy the same with prior art, that indicating device needs when being provided at the big short circuit current fault of generation under the loading condition by the magnetic inductive power supply.And obtain electric energy by electric field capacitation circuit in that no-load condition is next.Because the electric potential gradient pressure reduction between the iron core of magnetic inductive power supply and the electromagnetic isolation metal dish reaches thousands of volts, though the magnitude of current only picks up the following little electric current of microampere for number, behind high performance rectifier rectification, can obtain enough power storage in storage capacitor and offer indicating device and use.When heterogeneous big short circuit current fault takes place, by the bar shaped magnetic conductor T that is provided with near line of electric force
2Institute's perception triggers executive circuit after the short-circuit current judging circuit is differentiated, executive circuit work makes signal panels be indexed into the fault show state.When single-phase low current grounding takes place, by another bar shaped magnetic conductor T
3The characteristic current of institute's perception triggers executive circuit after the single-phase earth fault current judging circuit is differentiated, executive circuit work replaces to the fault show state signal panels.Owing to adopted the bar shaped magnetic conductor to serve as electromagnetic sensing element, there is not closed high-magnetodensity magnetic circuit in this strip structure, also just can not enter the magnetic saturation state, thereby solve the magnetic saturation nonlinear distortion question that current transformer formula sensing element commonly used exists well.The fundamental current sudden change component, the higher harmonic components that produce when utilizing the bar shaped magnetic conductor that various fault is taken place power circuit offer the relevant circuit of indicating device linearly, thereby its accuracy and reliability are all improved greatly.
Compared with the aforementioned existing similar products, the utility model has the advantages that simple in structurely, easy for installation, cost reduces greatly.Distorted signals is little, and dual power supply collection has improved the reliability of device greatly to the device cooperated power supply, has also solved the electrical problem of accident indicator under light condition.Alternative existing similar hung type power line failure indicator uses.
Content of the present utility model further illustrates with the following Examples, but content of the present utility model is not limited only to content related among the embodiment.
Description of drawings
Fig. 1 is a theory diagram of the present utility model
Fig. 2 is a structural representation of the present utility model
Fig. 3 is the circuit diagram of present embodiment
Embodiment
Shown in Fig. 1～3, this electric field energy obtaining type feeder line fault indicating device is made of the signal disc type display part that is mounted on magnetic inductive power supply, electric field capacitation circuit, sample circuit on the line of electric force 1, is connected to the executive circuit of sample circuit and is connected to executive circuit, wherein prior art is continued to use in magnetic inductive power supply, executive circuit and signal disc type display part, and described electric field capacitation circuit is by the iron core T that is located at the magnetic inductive power supply
1Electromagnetic isolation metal dish 2 in the external magnetic field, be connected in iron core T
1And the rectifier ZL between the electromagnetic isolation metal dish 2
2With two be connected to rectifier ZL
2The storage capacitor C of output terminal
2, C
3Constitute the rectifier ZL of described magnetic inductive power supply
1Output terminal after storage capacitor and executive circuit input end in parallel with the rectifier output end of electric field capacitation circuit join; Described sample circuit is by being wound with winding RZ respectively near two of line of electric force setting
2, RZ
3Bar shaped magnetic conductor T
2, T
3, be connected in winding RZ
2And the short-circuit current judging circuit between the executive circuit input end, be connected in winding RZ
3And the single-phase earth fault current judging circuit between the executive circuit input end constitutes.Above-mentioned each part is all filled with epoxy resin and is encapsulated in the plastic casing 3.When mounting use, bar shaped magnetic conductor T
2, T
3Be near the line of electric force position.Fig. 3 has provided the concrete formation of each circuit.
The same with prior art, by winding RZ
1Induction current is through rectifier ZL
1After the rectification, the electric energy that provides big short circuit current malfunction lower device to need.In addition, utilize iron core T
1And the electric potential gradient between the electromagnetic isolation metal dish 2 is poor, only picks up the little electric current of microampere through high-performance bridge heap rectifier ZL for number with what it had
2Obtain electric energy after the rectification and be stored in storage capacitor C
2, C
3In, be enough to satisfy the electricity consumption requirement of this device on nonloaded line.Bar shaped magnetic conductor T
2The winding RZ of last coiling
2For short-circuit current sudden change amount sensing element, when power circuit ran well, the amplitude of load current changed slow relatively, and this moment, the short-circuit current judging circuit did not have output signal.When the bigger short trouble of sudden change amount took place, short-circuit current judging circuit output mutation pulse enable executive circuit replaced to display window and demonstrates malfunction thereby drive display disc 4.This moment, the power circuit tripping operation had a power failure, and display disc is by magnetic circuit CL
4Remanent magnetism be locked in the fault show state.Bar shaped magnetic conductor T
2The winding RZ of last coiling
3Be the higher hamonic wave sensing element, when single-phase low current grounding takes place when, RZ
3The characteristic current of induction is transferred to the single-phase earth fault current judging circuit and is judged that output control pulse is given executive circuit, drives display disc 4 and replaces to display window and demonstrate malfunction.After fault was eliminated, when power circuit sent electricity again, executive circuit was to the RZ of signal disc type display part
5Winding sends reverse impulse, drives display disc 4 and resets.
Claims (1)
1, electric field energy obtaining type feeder line fault indicating device comprises the magnetic inductive power supply, the sample circuit that are mounted on the line of electric force, is connected to the executive circuit of sample circuit and is connected to the signal disc type display part of executive circuit, it is characterized in that:
A), described accident indicator also is provided with an electric field capacitation circuit, described electric field capacitation circuit is made of the electromagnetic isolation metal dish in the iron core external magnetic field that is located at the magnetic inductive power supply, rectifier and two storage capacitors that are connected to rectifier output end of being connected between this iron core and the electromagnetic isolation metal dish, and the output terminal of described magnetic inductive power supply after storage capacitor and executive circuit input end in parallel with the rectifier output end of electric field capacitation circuit join;
B), described sample circuit is by being wound with winding (RZ respectively near two of line of electric force setting
2), (RZ
3) bar shaped magnetic conductor (T
2), (T
3), be connected in winding (RZ
2) and the executive circuit input end between the short-circuit current judging circuit, be connected in winding (RZ
3) and the executive circuit input end between the single-phase earth fault current judging circuit constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03234588 CN2630861Y (en) | 2003-05-27 | 2003-05-27 | Electric field capacitation type power line failure indicating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03234588 CN2630861Y (en) | 2003-05-27 | 2003-05-27 | Electric field capacitation type power line failure indicating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2630861Y true CN2630861Y (en) | 2004-08-04 |
Family
ID=34291638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03234588 Expired - Fee Related CN2630861Y (en) | 2003-05-27 | 2003-05-27 | Electric field capacitation type power line failure indicating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2630861Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101442328A (en) * | 2008-11-27 | 2009-05-27 | 贾贤 | Anti-theft micro power consumption wireless data translator |
| CN109406942A (en) * | 2018-10-26 | 2019-03-01 | 咸阳金山益昕电子科技有限公司 | A kind of magnetic recorder component showing line fault |
-
2003
- 2003-05-27 CN CN 03234588 patent/CN2630861Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101442328A (en) * | 2008-11-27 | 2009-05-27 | 贾贤 | Anti-theft micro power consumption wireless data translator |
| CN109406942A (en) * | 2018-10-26 | 2019-03-01 | 咸阳金山益昕电子科技有限公司 | A kind of magnetic recorder component showing line fault |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |