CN202019191U - Electric arc fault circuit breaker - Google Patents
Electric arc fault circuit breaker Download PDFInfo
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- CN202019191U CN202019191U CN2011201522975U CN201120152297U CN202019191U CN 202019191 U CN202019191 U CN 202019191U CN 2011201522975 U CN2011201522975 U CN 2011201522975U CN 201120152297 U CN201120152297 U CN 201120152297U CN 202019191 U CN202019191 U CN 202019191U
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- electric arc
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Abstract
The utility model discloses an electric arc fault circuit breaker. The electric arc fault circuit breaker comprises a plastic case circuit breaker, a rest current protection module casing, an upper cover of the rest current protection module casing and a circuit breaker wiring terminal cover which are connected through screws, wherein the rest current protection module casing comprises an inner fixing tripping assembly, a test assembly, a detection assembly and a control circuit board, and the control circuit board, the detection assembly, the test assembly and the tripping assembly are welded and connected through conducting wires. The electric arc fault circuit breaker belongs to a mechanical and electrical integration switch assembly and can be used for detecting the occurrence of various kinds of faults in a power supply and distribution line, in addition, the expansion of combustion caused by electric arcs is avoided, the loss of life and property is reduced, the electric arc fault circuit breaker integrates the electric arc fault, leakage fault, short circuit fault, over current fault and overvoltage fault detection functions into a whole, the dangerous electric arc and the nondangeous electric arc can be distinguished through software algorithm, and a power supply is automatically cut off in a very short time.
Description
Technical field
The utility model relates to a kind of release unit, is applied in the low-voltage power supply and distribution system, belongs to low pressure for distribution safeguard protection field.
Background technology
At present; in the low-voltage distribution feed system, generally circuit breaker and the leakage protection module that can cut off the electricity supply automatically is installed all, its effect is: when short circuit, overload or leak current fault appear in the electric wiring rear end; but the trigger protection device is cut off the electricity supply, protection power consumption equipment and personal safety.Yet the arc fault that produces owing to contact or defective insulation in the electric wiring can not trigger these GPF (General Protection False device actions.Along with demands of social development, the continuous increase of power consumption, electric wiring are complicated day by day various, because of aging circuit, loosening insulation and the loose contact that produces happen occasionally, owing to the increase year by year of the event of fire that causes arc fault to cause.
The utility model content
The utility model technical issues that need to address provide a kind of and the DZ47 type circuit breaker appearance similar of popularizing, in loaded line generation overvoltage, when arc fault occurring because of loose contact or defective insulation, and the arc-fault circuit interrupter that can in time cut off the electricity supply.
For addressing the above problem; technical solution adopted in the utility model is: a kind of arc-fault circuit interrupter; comprise the breaker of plastic casing that connects by screw; the residual current protecting module housing; residual current protecting module housing loam cake and breaker connection terminal lid; wherein breaker of plastic casing comprises power output terminal; window; the disconnect connecting rod; the residual current protecting module housing comprises and carries trip assembley therefor; the trip assembley therefor lead-in wire; carry test suite; the test suite lead-in wire; the housing window; the dropout drive rod; power output terminal; described trip assembley therefor and test suite are fixed in the residual current protecting module housing; also be fixed with detection components and control circuit board in the residual current circuit breaker module, described control circuit board and detection components; test suite; connect by wire bonds between the trip assembley therefor.
Described detection components comprises difference mode signal magnetic test coil, common-mode signal magnetic test coil, detection of electrical leakage coil and connects lead that the lead that is connected that wherein connects circuit breaker power supply output phase terminal and residual current protecting modular power source output phase terminal passes common-mode signal magnetic test coil and detection of electrical leakage coil; The lead that is connected that connects circuit breaker power supply output zero terminal and residual current protecting modular power source output zero terminal passes common-mode signal magnetic test coil, detection of electrical leakage coil and difference mode signal magnetic test coil, and the circuit breaker power output terminal is connected lead with control circuit board by two and connects.
Described difference mode signal magnetic test coil is an epoxy shaped framework coil unshakable in one's determination, and the common-mode signal magnetic test coil is the permalloy shaped framework coil, and the detection of electrical leakage coil is a zero sequence current mutual inductor.
Described control circuit board comprises power circuit, signal sample circuit, online programming interface circuit, trip assembley therefor drive circuit, reset circuit, reference voltage circuit and a specialized. circuit modules, and described specialized. circuit modules comprises signal conditioning circuit, signal amplification circuit, signal processing circuit, voltage detecting circuit, internal storage and CPU circuit.
Adopt the beneficial effect that technique scheme produced to be: the utility model is the electromechanical integral switch assembly, can detect the generation of various faults in the power and distribution supply cable, and avoid because the burning that electric arc causes enlarges, reduce the loss of lives and properties, this is novel when the electric power system normal power supply, do not need under the situation of extra power supply, after with online mode fault message being discerned processing automatically, directly drive the electromagnetic trip assembly, make its action, cut off the electricity supply rapidly, avoid the expansion of failure effect; After fault is got rid of, can power by system restoration according to the closing operation of normal circuit breaker; When control circuit board all lost efficacy under limiting case, short circuit, the overload protection function of circuit breaker were unaffected.This novel current collection arc fault, leak current fault, short trouble, over current fault, overvoltage fault detection capability by software algorithm, can be differentiated dangerous electric arc and non-dangerous electric arc, cut off the electricity supply automatically in the short time at the utmost point.
Description of drawings
Fig. 1 is the utility model theory diagram;
Fig. 2 is the utility model embodiment partial circuit schematic diagram;
Fig. 3 is the utility model software flow pattern.
Embodiment
Below in conjunction with accompanying drawing the utility model is done and to be described in further detail: this novel breaker of plastic casing that connects by screw that comprises; the residual current protecting module housing; residual current protecting module housing loam cake and breaker connection terminal lid; wherein breaker of plastic casing comprises power output terminal; window; the disconnect connecting rod; the residual current protecting module housing comprises and carries trip assembley therefor; the trip assembley therefor lead-in wire; carry test suite; the test suite lead-in wire; the housing window; the dropout drive rod; power output terminal; described trip assembley therefor and test suite are fixed in the residual current protecting module housing; also be fixed with detection components and control circuit board in the residual current circuit breaker module, described control circuit board and detection components; test suite; connect by wire bonds between the trip assembley therefor.
Described detection components comprises difference mode signal magnetic test coil, common-mode signal magnetic test coil, detection of electrical leakage coil and connects lead that the lead that is connected that wherein connects circuit breaker power supply output phase terminal and residual current protecting modular power source output phase terminal passes common-mode signal magnetic test coil and detection of electrical leakage coil; The lead that is connected that connects circuit breaker power supply output zero terminal and residual current protecting modular power source output zero terminal passes common-mode signal magnetic test coil, detection of electrical leakage coil and difference mode signal magnetic test coil, and the circuit breaker power output terminal is connected lead with control circuit board by two and connects.
Described difference mode signal magnetic test coil is an epoxy shaped framework coil unshakable in one's determination, and the common-mode signal magnetic test coil is the permalloy shaped framework coil, and the detection of electrical leakage coil is a zero sequence current mutual inductor.
Described control circuit board comprises power circuit, signal sample circuit, online programming interface circuit, trip assembley therefor drive circuit, reset circuit, reference voltage circuit and a specialized. circuit modules, described specialized. circuit modules comprises signal conditioning circuit, signal amplification circuit, signal processing circuit, voltage detecting circuit, internal storage and CPU circuit, and its theory diagram is referring to Fig. 1.
This novel employing DZ47 shape case circuit breaker is a prototype, keeps its original structure member and shell; Prolong with its short-circuit protection, overload protection function, and Integrated Electronic Component, comprise transducer (electric current mutual inductor group), electronic circuit board, arc circuit module; Be implemented in and increase earth leakage protective, arc protection, overvoltage protection and surge inhibit feature on the conventional circuit breaker.
The high conventional circuit breaker tripping mechanism (motor switch of cutting off the electricity supply) of this novel reservation reliability, newly-increased electric arc fault protection function, when producing arc fault because of contact or defective insulation in the electric wiring, arc-fault circuit interrupter can monitor, and takes corresponding measure according to the arc fault extent of injury; Newly-increased over-voltage protecting function is when supply power voltage continues to be higher than 275V, at 0.1 second internal cutting off power supply; Newly-increased surge inhibit feature, when supply line was subjected to outside electromagnetic interference to produce the instantaneous high pressure pulse, arc-fault circuit interrupter is the suppressor pulse electric current fast; It is constant that installation dimension keeps GB to require, and makes it just the same with the installation method of conventional circuit breaker when mounted, and any qualified electrician personnel can skillfully install, dismantlement work.
This novel employing high-speed microprocessor cooperates software algorithm with difference " good arc " and " bad arc ", and short circuit during this is novel, overload protection adopt the electromagnetic type triggering mode, and arc protection, earth leakage protective and overvoltage protection adopt the electronic type triggering mode.Both be separated from each other, and can share same tripping mechanism (motor switch of cutting off the electricity supply) again.Under such design, even the some or all of inefficacy of electronic unit, product still has the short-circuit protection and the overload protection two big functions of conventional circuit breaker.
Figure 2 shows that the partial circuit schematic diagram of this novel arc-fault circuit interrupter, arc-detection that wherein specialized. circuit modules U1 is integrated judges and the detection of electrical leakage decision circuit that the concrete control circuit of this novel breaker is: capacitor C 1, piezo-resistance R1 are connected in parallel on power input; Resistance R 3 one termination powers, the ac input end of another termination rectifier bridge D1; Resistance R 2 one termination powers, another ac input end of another termination rectifier bridge D1; Capacitor C 2 positive poles are connected on the direct current output cathode of rectifier bridge D1, minus earth; The direct current output cathode end of resistance R 4 one termination rectifier bridge D1,20 pins of a termination specialized. circuit modules U1; The direct current output cathode of resistance R 5 one termination rectifier bridge D1, the collector electrode of another termination triode D2; Resistance R 6 one termination rectifier bridge D1 direct current output cathodes, a termination triode D2 base stage; Positive pole connects triode D2 emitter, minus earth after capacitor C 3, the C4 parallel connection; 12 pins of triode D2 emitter connection circuit module.
Tripping coil L1 one termination power; The ac input end of another termination rectifier bridge D5, voltage stabilizing didoe D6 negative pole connects the direct current output cathode of rectifier bridge D5, plus earth; One-way SCR D7 negative pole connects rectifier bridge D5 direct current output cathode, D7 plus earth; One-way SCR D7 control utmost point connecting resistance R8, R7, capacitor C 5; Resistance R 8, capacitor C 5 other end ground connection; Resistance R 7 another terminating diode D3, D4 negative pole; Diode D3 cathode circuit module 7 pins; The anodal connection circuit module of diode D4 17 pins.
Described difference mode signal magnetic test coil L4 two is with 1 pin of lead-in wire one termination specialized. circuit modules U1,2 pins of another termination specialized. circuit modules U1; 3 pins of two lead-in wires of described common-mode signal magnetic test coil L3, one termination specialized. circuit modules U1,4 pins of another termination specialized. circuit modules U1; 19 pins of two lead-in wire one termination specialized. circuit modules U1 of described detection of electrical leakage coil L2,21 pins of another termination specialized. circuit modules U1.
Resistance R 13 is connected across between 19 and 21 pins of specialized. circuit modules U1; 8 pins of resistance R 9 one termination specialized. circuit modules U1, another termination LED positive pole; The LED minus earth; Resistance R 12 is connected across between 11 and 10 pins of specialized. circuit modules U1; Resistance R 10 is connected across between 11 and 6 pins of specialized. circuit modules U1; 6 pins of resistance R 11 1 termination specialized. circuit modules U1, other end ground connection.
5,6,10,11,22 of specialized. circuit modules U1 links to each other with 1,2,3,4,5 pins of online programming interface U2 respectively.
14,15 pins of specialized. circuit modules U1 connect power supply, and 12 pins of specialized. circuit modules U1 link to each other with triode D2 emitter; 18 pins of specialized. circuit modules U1 link to each other with the direct current output cathode of rectifier bridge D1; The 22 pin ground connection of specialized. circuit modules U1.
Operation principle:
Phase line of this novel 220V mains supply and zero line insert the power input terminal of circuit breaker, and the circuit breaker power output terminal connects loaded line, and circuit breaker hand switch closure when circuit breaker is the loaded line power supply, is the control circuit board power supply.Under the normal operation, the connection lead in the detection components is sent power supply into control circuit board, in the time of for circuit supply, provides voltage signal, and the voltage detecting circuit in the circuit board is to voltage signal analysis, processing; Differentiate whether overvoltage of circuit by software, send the instruction of threading off, dropout drive circuit works to the dropout drive circuit if the overvoltage fault takes place, drive the tripping coil action and make the displacement of dropout drive rod, interlock short switch connecting rod makes circuit breaker tripping, cuts off the electricity supply.When power input generation surge fault, the part impulse current of can releasing fast of the piezo-resistance on the control circuit board, electrical equipment and equipment in the protection loaded line.
This novel sensor design adopts many group electric current mutual inductors to form, and is responsible for gathering the high and low frequency current changing signal in the circuit, is input in the specialized. circuit modules respectively then.The built-in residual current protective unit of specialized. circuit modules, amplifying circuit and CPU can be handled respectively the line current variable signal, the variation of low-and high-frequency signal in the Monitoring Line in real time.The ifs circuit module is judged when having leak current fault to take place in the circuit, directly drives tripping mechanism and cuts off the electricity supply, and prevents possibility human electric shock's danger with prestissimo; The ifs circuit module is judged when being arc fault, then with the fault-signal amplification, sends into CPU again.By CPU analog signal is carried out the A/D conversion, the analog signal through amplifying is transformed to digital signal, so that software program identification computing.Software is analyzed the arcing fault signal that collects according to certain algorithm, and differentiation is " good arc " or " bad arc ", as the foundation of further taking measures.If " good arc " that appliance starting or switch cause then from newly getting back to monitoring state, goes round and begins again; If " bad arc " that line fault causes then sends the instruction of threading off to the dropout drive circuit, the dropout drive circuit works drives the tripping coil action and makes the displacement of dropout drive rod, and interlock short switch connecting rod makes circuit breaker tripping, cuts off the electricity supply.
Electric leakage decision circuit in the specialized. circuit modules is the general detection of electrical leakage chip of standard, and custom circuits such as all the other rectifications, filtering amplification are not done detailed description at this.The judgement of arc fault relies on the integrated software code of central processing unit to finish, and its flow chart as shown in Figure 3.
The above is specific embodiments of the invention only, and protection scope of the present invention is not limited thereto, and any equivalent transformation based on technical solution of the present invention all belongs within protection scope of the present invention.
Claims (4)
1. arc-fault circuit interrupter; comprise the breaker of plastic casing that connects by screw; the residual current protecting module housing; residual current protecting module housing loam cake and breaker connection terminal lid; wherein breaker of plastic casing comprises power output terminal; window; the disconnect connecting rod; the residual current protecting module housing comprises and carries trip assembley therefor; the trip assembley therefor lead-in wire; carry test suite; the test suite lead-in wire; the housing window; the dropout drive rod; power output terminal; described trip assembley therefor and test suite are fixed in the residual current protecting module housing; it is characterized in that: also be fixed with detection components and control circuit board, described control circuit board and detection components in the residual current circuit breaker module; test suite; connect by wire bonds between the trip assembley therefor.
2. arc-fault circuit interrupter according to claim 1, it is characterized in that described detection components comprises difference mode signal magnetic test coil, common-mode signal magnetic test coil, detection of electrical leakage coil and connects lead, the lead that is connected that wherein connects circuit breaker power supply output phase terminal and residual current protecting modular power source output phase terminal passes common-mode signal magnetic test coil and detection of electrical leakage coil; The lead that is connected that connects circuit breaker power supply output zero terminal and residual current protecting modular power source output zero terminal passes common-mode signal magnetic test coil, detection of electrical leakage coil and difference mode signal magnetic test coil, and the circuit breaker power output terminal is connected lead with control circuit board by two and connects.
3. arc-fault circuit interrupter according to claim 2 is characterized in that described difference mode signal magnetic test coil is an epoxy shaped framework coil unshakable in one's determination, and the common-mode signal magnetic test coil is the permalloy shaped framework coil, and the detection of electrical leakage coil is a zero sequence current mutual inductor.
4. arc-fault circuit interrupter according to claim 1, it is characterized in that described control circuit board comprises power circuit, signal sample circuit, online programming interface circuit, trip assembley therefor drive circuit, reset circuit, reference voltage circuit and a specialized. circuit modules, described specialized. circuit modules comprises signal conditioning circuit, signal amplification circuit, signal processing circuit, voltage detecting circuit, internal storage and CPU circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201522975U CN202019191U (en) | 2011-05-13 | 2011-05-13 | Electric arc fault circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201522975U CN202019191U (en) | 2011-05-13 | 2011-05-13 | Electric arc fault circuit breaker |
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| Publication Number | Publication Date |
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| CN202019191U true CN202019191U (en) | 2011-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011201522975U Expired - Fee Related CN202019191U (en) | 2011-05-13 | 2011-05-13 | Electric arc fault circuit breaker |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103376372A (en) * | 2012-04-23 | 2013-10-30 | 福建俊豪电子有限公司 | Three-phase AFCI detecting device |
| CN103454582A (en) * | 2013-09-03 | 2013-12-18 | 辽宁工程技术大学 | Detection device for broken-down electric arcs of breaker |
| CN105759791A (en) * | 2016-04-22 | 2016-07-13 | 浙江科能达电气有限公司 | Intelligent controller of circuit breaker and real-time detection method based on intelligent controller |
| CN107450015A (en) * | 2017-06-13 | 2017-12-08 | 国网湖南省电力公司 | Intelligent micro-circuit breaker driving force test method and device |
| CN108879588A (en) * | 2018-08-31 | 2018-11-23 | 国网浙江温岭市供电有限公司 | A kind of new pattern creepage and arc fault comprehensive protector |
| CN109239561A (en) * | 2018-11-29 | 2019-01-18 | 宁波习羽智能科技有限公司 | Slave, host and detector for split type fault electric arc detector |
| CN109713652A (en) * | 2019-01-16 | 2019-05-03 | 安徽升隆电气有限公司 | A kind of fault electric arc breaker |
| CN110097881A (en) * | 2019-04-26 | 2019-08-06 | 深圳德微电技术有限公司 | A kind of intelligent breaker of speech recognition controlled |
-
2011
- 2011-05-13 CN CN2011201522975U patent/CN202019191U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103376372A (en) * | 2012-04-23 | 2013-10-30 | 福建俊豪电子有限公司 | Three-phase AFCI detecting device |
| CN103454582A (en) * | 2013-09-03 | 2013-12-18 | 辽宁工程技术大学 | Detection device for broken-down electric arcs of breaker |
| CN105759791A (en) * | 2016-04-22 | 2016-07-13 | 浙江科能达电气有限公司 | Intelligent controller of circuit breaker and real-time detection method based on intelligent controller |
| CN107450015A (en) * | 2017-06-13 | 2017-12-08 | 国网湖南省电力公司 | Intelligent micro-circuit breaker driving force test method and device |
| CN108879588A (en) * | 2018-08-31 | 2018-11-23 | 国网浙江温岭市供电有限公司 | A kind of new pattern creepage and arc fault comprehensive protector |
| CN109239561A (en) * | 2018-11-29 | 2019-01-18 | 宁波习羽智能科技有限公司 | Slave, host and detector for split type fault electric arc detector |
| CN109713652A (en) * | 2019-01-16 | 2019-05-03 | 安徽升隆电气有限公司 | A kind of fault electric arc breaker |
| CN110097881A (en) * | 2019-04-26 | 2019-08-06 | 深圳德微电技术有限公司 | A kind of intelligent breaker of speech recognition controlled |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20161215 Address after: 315317 Cixi industrial development road, Qiaotou town, Zhejiang, No. 6 Patentee after: Ningbo Xi Yu electrical Polytron Technologies Inc Address before: 100000 Beijing, Fengtai District, South Fourth Ring Road West, No. 188 headquarters base, building 15, District 5, floor 9 Patentee before: Huang Wujie Patentee before: Li Juelong |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111026 Termination date: 20170513 |