CN2821976Y - Arc fault protective circuit - Google Patents
Arc fault protective circuit Download PDFInfo
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- CN2821976Y CN2821976Y CN 200520043047 CN200520043047U CN2821976Y CN 2821976 Y CN2821976 Y CN 2821976Y CN 200520043047 CN200520043047 CN 200520043047 CN 200520043047 U CN200520043047 U CN 200520043047U CN 2821976 Y CN2821976 Y CN 2821976Y
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Abstract
The utility model provides an arc fault secure circuit, which comprises an arc signal detection circuit, a rectifying and filtering circuit, a signal comparison circuit, a combination/division manipulating circuit and a breaking fault circuit, wherein the arc signal detection circuit is connected to a three-phase AC supply and used for sensing the composite voltage signal of a normal voltage and the arc and filtering signals with the frequency lower than 60Hz; the rectifying and filtering circuit is connected with the three-phase AC supply and the arc signal detection circuit and used for rectifying and filtering the three-phase AC supply so as to offer low-voltage power supply, and rectifying and filtering the high frequency arc signal output by the arc signal detection circuit; the signal comparison circuit which is connected with the rectifying and filtering circuit receives the rectified and filtered arc signal that is then amplified and compared, and a triggered electrical level is output when the amplitude value of an arc component reaches a certain value and the time of continuous arc burning exceeds a set time; the combination/division manipulating circuit is connected with the signal comparison circuit; the breaking fault circuit is used for receiving the triggered electrical level output by the signal comparison circuit so as to eliminate the hidden danger of fire and reduce losses.
Description
Technical field
The utility model belongs to electronics, electric equipment electricity consumption fire safeguard protection field, is specifically related to a kind of arc fault safety guard.
Background technology
The conventional typical supply power mode of electric equipment is to adopt AC power, by couple of conductor and a socket, makes electronic and electrical equipment or load receive power supply.Electronic and electrical equipment directly links to each other with power supply by couple of conductor, constituted a series of potential hazard, particularly the corrosion that is electrically connected poor reliability or jockey of some electric equipment is aging, the feasible loose contact that is electrically connected, very easily produce and cause discharge because of tie point is bad, produce electric arc, as if things go on like this causing the damage of circuit or termination, also can produce fire when serious, bring enormous economic loss to the user.
Present plug does not possess the electric arc fault protection function, has the arc fault disaster hidden-trouble.
Summary of the invention
The purpose of this utility model is to provide a kind of electric arc fault protection circuit.
For reaching above-mentioned purpose, the utility model adopts sends out technical scheme following,
A kind of electric arc fault protection circuit comprises:
The arc signal testing circuit, it is connected on the three-phase alternating-current supply, is used to induce the composite voltage signal of normal voltage and electric arc, and filters 60HZ and with the signal of lower frequency;
Current rectifying and wave filtering circuit, it links to each other with the arc signal testing circuit with three-phase alternating-current supply, is used for the rectifying and wave-filtering of three-phase alternating-current supply so that low-tension supply to be provided, and the hf electric arc signal of arc signal testing circuit output is carried out rectifying and wave-filtering;
Signal comparator circuit, it links to each other with described current rectifying and wave filtering circuit, its receive through the arc signal of rectifying and wave-filtering and amplify, comparison process, when the amplitude of electric arc component reaches a certain set point, and the time of lasting arcing is exported a triggering level when surpassing official hour;
Close the branch operating circuit, the described branch operating circuit that closes links to each other with described signal comparator circuit; Be used to receive the triggering level of described signal comparator circuit output and the disjunction faulty circuit.
Wherein, also can comprise a hand switch, this switch links to each other with electronic switch; Under the normal operating conditions, can make the circuit disjunction by the conducting that closed hand switch is controlled electronic switch.
Wherein, described arc signal testing circuit can be made up of induction coil and high frequency filter; The elementary of described induction coil is connected on the three-phase alternating-current supply, secondaryly links to each other with high frequency filter; Induction coil level secondarily induces a composite voltage signal that comprises normal voltage and electric arc; High frequency filter is used to filter 60HZ and with the signal of lower frequency.
Wherein, the described branch operating circuit that closes can be made up of electronic switch, separation release; Electronic switch one end connects and separates release, and the other end links to each other with described signal comparator circuit; The triggering level of signal comparator circuit output makes the electronic switch conducting, separates the release adhesive, and operating mechanism moves and the disjunction faulty circuit.
The utility model arc protection circuit, it can prevent to reduce the loss because of the aging spark that produces of the corrosion that is electrically connected poor reliability or jockey of equipment, the fire hazard that arcing causes.
Further specify the utility model below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is the circuit theory diagrams of electric arc fault protection circuit;
Fig. 2 is the circuit diagram of electric arc fault protection circuit.
Embodiment
As shown in Figure 1, 2, a kind of electric arc fault protection circuit comprises,
The arc signal testing circuit, it is connected on the three-phase alternating-current supply, is used to induce the composite voltage signal of normal voltage and electric arc, and filters 60HZ and with the signal of lower frequency;
Current rectifying and wave filtering circuit, it links to each other with the arc signal testing circuit with three-phase alternating-current supply, is used for the rectifying and wave-filtering of three-phase alternating-current supply so that low-tension supply to be provided, and the hf electric arc signal of arc signal testing circuit output is carried out rectifying and wave-filtering;
Signal comparator circuit, it links to each other with described current rectifying and wave filtering circuit, its receive through the arc signal of rectifying and wave-filtering and amplify, comparison process, when the amplitude of electric arc component reaches a certain set point, and the time of lasting arcing is exported a triggering level when surpassing official hour;
Close the branch operating circuit, the described branch operating circuit that closes links to each other with described signal comparator circuit; Be used to receive the triggering level of described signal comparator circuit output and the disjunction faulty circuit.
Described arc signal testing circuit is made up of induction coil L1 and a high frequency filter of being made up of capacitor C 1～C3 and inductance L 2～L5; The elementary of described induction coil is connected on the three-phase alternating-current supply, secondaryly links to each other with high frequency filter; Induction coil L1 level secondarily induces a composite voltage signal that comprises normal voltage and electric arc; The normal AC sine wave of 60Hz and the complex wave voltage signal of improper high order harmonic component have wherein been comprised, this mixed signal is separated by high frequency filter, it utilizes high pass filter by capacitor C 1, inductance L 2 and capacitor C 3, inductance L 5 is formed two series resonant network respectively, its resonance frequency design is at 60Hz, because capacitor C 1, inductance L 2 and capacitor C 3, the current signal of 5 couples of 60Hz of inductance L is high impedance and the current signal that is higher than 60Hz is in the off resonance state and is Low ESR, inductance L in the high pass filter 3 in addition, L4 is Low ESR to 60Hz and following current signal thereof, these signals are shunted, and the current signal that is higher than 60Hz is high resistant, stoped frequency to be higher than the shunting of 60Hz signal.Finally the signal by high pass filter output is high-frequency signal and the arc current signal that frequency is higher than 60Hz, has realized separating of normal signal and improper signal;
Described current rectifying and wave filtering circuit is made of diode (V1, V2, V3, V4) and resistance R 5, R6 and pressure limiting resistance 4 and capacitor C 5, diode V5; And provide D.C. regulated power supply for separating release 3, electronic switch 2 and IC control circuit; And the hf electric arc signal that the arc signal testing circuit is exported carries out rectifying and wave-filtering;
Described signal comparator circuit is an IC control circuit, and resistance R 2, R3, R4 and capacitor C 4, C6, C7, C8, C9 constitute the peripheral filter circuit of IC and get rid of interference.The IC control circuit to improper arc signal amplify, comparison process, when the amplitude of electric arc component reaches a certain set point, and the time of lasting arcing is when surpassing official hour, triggering level of IC control circuit output, make electronic switching circuit V6 conducting, separate release 3 actions and the disjunction faulty circuit;
The described branch operating circuit that closes is made up of electronic switch 2, separation release 3; Electronic switch 2 conductings separate the action of release 3 adhesive operating mechanisms and the disjunction faulty circuit.
Described hand switch 1 links to each other with electronic switch 2; Under the normal operating conditions, can control the conducting of electronic switch 2, make the circuit disjunction by closed hand switch 1.
Electric arc fault protection circuit is used in the risk that prevents arc fault and cause fire usually; in general the arc fault device can induce the existence of electric arc dangerous situation in equipment or the load; as response; circuit between its meeting deenergization and the load is to eliminate fire; this invention is that the operation principle with electric arc fault protection is applied in the attaching plug, can use with unprotected AC socket.
Claims (4)
1, a kind of electric arc fault protection circuit is characterized in that comprising:
The arc signal testing circuit, it is connected on the three-phase alternating-current supply, is used to induce the composite voltage signal of normal voltage and electric arc, and filters 60HZ and with the signal of lower frequency;
Current rectifying and wave filtering circuit, it links to each other with the arc signal testing circuit with three-phase alternating-current supply, is used for the rectifying and wave-filtering of three-phase alternating-current supply so that low-tension supply to be provided, and the hf electric arc signal of arc signal testing circuit output is carried out rectifying and wave-filtering;
Signal comparator circuit, it links to each other with described current rectifying and wave filtering circuit, its receive through the arc signal of rectifying and wave-filtering and amplify, comparison process, when the amplitude of electric arc component reaches a certain set point, and the time of lasting arcing is exported a triggering level when surpassing official hour;
Close the branch operating circuit, the described branch operating circuit that closes links to each other with described signal comparator circuit; Be used to receive the triggering level of described signal comparator circuit output and the disjunction faulty circuit.
2, electric arc fault protection circuit according to claim 1 is characterized in that: described arc signal testing circuit is made up of induction coil and high frequency filter; The elementary of described induction coil is connected on the three-phase alternating-current supply, secondaryly links to each other with high frequency filter; Induction coil level secondarily induces a composite voltage signal that comprises normal voltage and electric arc; High frequency filter is used to filter 60HZ and with the signal of lower frequency.
3, electric arc fault protection circuit according to claim 1 and 2 is characterized in that: the described branch operating circuit that closes is made up of electronic switch, separation release; Electronic switch one end connects and separates release, and the other end links to each other with described signal comparator circuit.
4, electric arc fault protection circuit according to claim 3 is characterized in that: also comprise a hand switch, this switch links to each other with electronic switch; Under the normal operating conditions, can make the circuit disjunction by the conducting that closed hand switch is controlled electronic switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520043047 CN2821976Y (en) | 2005-06-30 | 2005-06-30 | Arc fault protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520043047 CN2821976Y (en) | 2005-06-30 | 2005-06-30 | Arc fault protective circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2821976Y true CN2821976Y (en) | 2006-09-27 |
Family
ID=37018527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520043047 Expired - Fee Related CN2821976Y (en) | 2005-06-30 | 2005-06-30 | Arc fault protective circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2821976Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102565622A (en) * | 2010-09-29 | 2012-07-11 | 三星电子株式会社 | Electric device and method to detect arc fault in the same |
| CN107505544A (en) * | 2017-08-14 | 2017-12-22 | 北京腾控科技有限公司 | Based on microprocessor without externally fed electric arc alarm |
| CN107703426A (en) * | 2017-11-27 | 2018-02-16 | 北京腾控科技有限公司 | A kind of fault arc detection method detected by electric arc pulse signal starting |
| CN107991587A (en) * | 2017-11-27 | 2018-05-04 | 北京腾控科技有限公司 | A kind of fault arc detection method detected by electric arc pulse signal starting |
-
2005
- 2005-06-30 CN CN 200520043047 patent/CN2821976Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102565622A (en) * | 2010-09-29 | 2012-07-11 | 三星电子株式会社 | Electric device and method to detect arc fault in the same |
| CN107505544A (en) * | 2017-08-14 | 2017-12-22 | 北京腾控科技有限公司 | Based on microprocessor without externally fed electric arc alarm |
| CN107703426A (en) * | 2017-11-27 | 2018-02-16 | 北京腾控科技有限公司 | A kind of fault arc detection method detected by electric arc pulse signal starting |
| CN107991587A (en) * | 2017-11-27 | 2018-05-04 | 北京腾控科技有限公司 | A kind of fault arc detection method detected by electric arc pulse signal starting |
| CN107703426B (en) * | 2017-11-27 | 2019-11-12 | 北京腾控科技有限公司 | A kind of fault arc detection method detected by electric arc pulse signal starting |
| CN107991587B (en) * | 2017-11-27 | 2019-11-12 | 北京腾控科技有限公司 | A kind of fault arc detection method detected by electric arc pulse signal starting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060927 Termination date: 20110630 |