CN104332948A - Arc fault protection device - Google Patents

Arc fault protection device Download PDF

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Publication number
CN104332948A
CN104332948A CN201410630472.5A CN201410630472A CN104332948A CN 104332948 A CN104332948 A CN 104332948A CN 201410630472 A CN201410630472 A CN 201410630472A CN 104332948 A CN104332948 A CN 104332948A
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CN
China
Prior art keywords
current
load
processor
voltage
output
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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.)
Pending
Application number
CN201410630472.5A
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Chinese (zh)
Inventor
胡新明
康志林
牛小东
马超明
牛伟
颉定文
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GANSU ELECTRIC APPARATUS RESEARCH INSTITUTE
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GANSU ELECTRIC APPARATUS RESEARCH INSTITUTE
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Priority to CN201410630472.5A priority Critical patent/CN104332948A/en
Publication of CN104332948A publication Critical patent/CN104332948A/en
Pending legal-status Critical Current

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Abstract

The invention relates to the technical field of electrical equipment and household appliance protection and discloses an arc fault protection device. The device comprises a central processing unit, an output drive circuit and an alarm light. The input end of the central processing unit is connected with output ends of a voltage filtering processor, a first current filtering processor and a second current filtering processor respectively. According to the device, the voltage in a load circuit is acquired through a voltage transformer, the serial current in the load circuit is acquired through a first current transformer, the parallel current in the load circuit is acquired through a second current transformer, and accordingly, the problems of the damage of loads due to the failure of protection caused by distance running of a breaker or the reduction of power reliability caused by the maloperation of conventional arc fault protection breakers are solved by combining with the voltage waveform of arc faults and integrating fault protection with leakage protection on the basis of the arc fault current waveform. The device has the advantages of being complete in protection items and accurate and reliable in breaker action.

Description

Protection device for arc faults
Technical field
The present invention relates to electric equipment and household electrical appliance resist technology field, based on the current waveform of a kind of arc fault in load circuit specifically, take into account the protection device for arc faults of the voltage waveform analysis process of arc fault.
Background technology
Along with the development of science and technology, social electrifing degree is more and more higher, and electric equipment and household electrical appliance increase suddenly, and electrical fire accident also sharply increases.Within 2010, the whole nation accounts for 30.7% of fire sum because of the fire that electrically reason causes such as wire short-circuiting, overload and electrical equipment malfunction, in 69 comparatively large above fire incidents, has 24 to cause for electric reason.Because electric wiring and device line long-play are in overload or exist in bad electrical connection state in general residential building, the insulating barrier of power line is accelerated aging, insulation effect reduces, or insulating barrier occurs damaged, and these are all easier to the generation causing arc fault.Conventional electric arc fault protection kind equipment only with the current waveform in analyzing and processing load circuit for benchmark, can not reflect the truth of arc fault, easily cause circuit breaker malfunction or tripping, fire incident happens occasionally comprehensively.
Summary of the invention
The object of this invention is to provide a kind of protection device for arc faults, based on the current waveform of arc fault, take into account the voltage waveform of arc fault, make breaker actuation in load circuit more accurate, avoid malfunction or the tripping of circuit breaker.
For achieving the above object, the technical solution used in the present invention is:
A kind of protection device for arc faults, be connected to load electricity consumption loop, it comprises center processor, the output driving circuit be connected with the output of center processor, alarm lamp, the input of described center processor is connected with the output of voltage filter processor, the first current filtering processor, the second current filtering processor respectively; The output of described output driving circuit is connected with the input of dropout driving mechanism, and the described output of dropout driving mechanism is connected with the circuit breaker in load circuit;
The described input of voltage filter processor is connected with the output of voltage transformer, the input of described voltage transformer is parallel in the electricity consumption loop of load, the voltage in the load electricity consumption loop collected is transferred to center processor by described voltage transformer after the process of voltage filter processor, the comparing of gathered voltage and setting voltage waveform in original system, analysis and process is completed, with supplementing of realizing that arc fault current in load circuit detects in center processor;
The input of described first current filtering processor is connected with the output of the first current transformer, the input of described first current transformer is connected in the electricity consumption loop of load, the load current collected is transferred in center processor by described first current transformer after described first current filtering processor process, in described centring system, complete the analysis of load in series current waveform, compare and process, to realize the detection of series arc faults in load circuit;
The input of described second current filtering processor is connected with the output of the second current transformer, the input of described second current transformer is connected in parallel in the electricity consumption loop of load, the load current collected is transferred in center processor by described second current transformer after described second current filtering processor process, in described centring system, complete the analysis of load parallel-current waveform, compare and process, to realize the detection of parallel arc fault and leakage current in load circuit;
The electric current collected, voltage signal compare by described center processor, analyze after, when breaking down, send AIS, described alarm lamp sends arc fault and to report to the police instruction; Described center processor sends actuating signal to described output driving circuit simultaneously, and output driving circuit promotes the action of described dropout driving mechanism, makes the described circuit breaker tripping in load circuit, reaches the object of protection load.
As a further improvement on the present invention, the input of described center processor is also connected with reset setting device, after the arc fault process in load circuit terminates, presses described reset setting device, realizes the reset of protection device for arc faults.
The present invention gathers the voltage in load circuit by described voltage transformer, first current transformer gathers the series current in load circuit, second instrument transformer gathers the parallel-current in load circuit, based on the current waveform of arc fault, take into account the voltage waveform of arc fault, integrate electric arc fault protection and earth leakage protective, overcoming conventional arc-fault circuit interrupter causes power supply reliability to reduce due to malfunction, or because circuit breaker causes shielding failure apart from moving, cause the problem that load is damaged, the earth leakage protective of load circuit is also achieved while electric arc fault protection, by use of the present invention, can improve load electricity consumption loop fail safe, reliability, there is protection project complete, breaker actuation accurately, advantage reliably.
Accompanying drawing explanation
Fig. 1 is connection diagram of the present invention;
Fig. 2 is the schematic diagram that the present invention is connected in load circuit;
In figure: 1, reset setting, 2, voltage transformer, 3, voltage filter processor; 4, the first current transformer, the 5, first current filtering processor, the 6, second current transformer; 7, the second current filtering process, 8, center processor, 9, alarm lamp; 10, output driving circuit; 11, dropout driving mechanism, 12, power supply, 13, circuit breaker; 14, protection device for arc faults, 15, load.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further detailed explanation.
A kind of protection device for arc faults as shown in Figure 1, be connected in load electricity consumption loop, as shown in Figure 2, it comprises center processor 8, the output driving circuit 10 be connected with the output of center processor 8, alarm lamp 9, the input of center processor 8 is connected with the output of voltage filter processor 3, first current filtering processor 5, second current filtering processor 7 respectively; The output of output driving circuit 10 is connected with the input of dropout driving mechanism 11, and the output of dropout driving mechanism 11 is connected with the circuit breaker 13 in load circuit;
The input 2 of voltage filter processor is connected with the output of voltage transformer 2, the input of voltage transformer 2 is parallel in the electricity consumption loop of load 15, the voltage in the load 15 electricity consumption loop collected is transferred to center processor 8 by voltage transformer 2 after voltage filter processor 3 processes, the comparing of gathered voltage and setting voltage waveform in original system, analysis and process is completed, with supplementing of realizing that arc fault current in load circuit detects in center processor 8;
The input of the first current filtering processor 5 is connected with the output of the first current transformer 4, the input of the first current transformer 4 is connected in the electricity consumption loop of load 15, the load current collected is transferred in center processor 8 by the first current transformer 4 after the first current filtering processor 5 processes, in centring system 8, complete the analysis of load in series current waveform, compare and process, to realize the detection of series arc faults in load circuit;
The input of the second current filtering processor 7 is connected with the output of the second current transformer 6, the input of the second current transformer 6 is connected in parallel in the electricity consumption loop of load 15, the load current collected is transferred in center processor 8 by the second current transformer 6 after the second current filtering processor 7 processes, in centring system 8, complete the analysis of load parallel-current waveform, compare and process, to realize the detection of parallel arc fault and leakage current in load circuit;
The electric current collected, voltage signal compare by center processor 8, analyze after, when breaking down, send AIS, alarm lamp 9 sends arc fault and to report to the police instruction; Center processor 8 sends actuating signal to output driving circuit 10 simultaneously, and output driving circuit 10 promotes dropout driving mechanism 11 action, and the circuit breaker 13 in load circuit is threaded off, and reaches the object of protection load 15.
The input of center processor 8 is also connected with reset setting device 1, after the arc fault process in load circuit terminates, presses reset setting device 1, realizes the reset of protection device for arc faults.
By use of the present invention; overcome conventional fault electric arc protection kind equipment malfunction and cause power supply reliability to reduce or tripping and cause the problem of shielding failure; overcome again the problem that leakage protection equipment can not protect fault electric arc, the present invention protects project complete, reliable in action.

Claims (2)

1. a protection device for arc faults, be connected to load electricity consumption loop, it comprises center processor (8), the output driving circuit (10) be connected with the output of center processor (8), alarm lamp (9), is characterized in that: the input of described center processor (8) is connected with the output of voltage filter processor (3), the first current filtering processor (5), the second current filtering processor (7) respectively; The output of described output driving circuit (10) is connected with the input of dropout driving mechanism (11), and the output of described dropout driving mechanism (11) is connected with the circuit breaker (13) in load circuit;
The input (2) of described voltage filter processor is connected with the output of voltage transformer (2), the input of described voltage transformer (2) is parallel in the electricity consumption loop of load (15), the voltage in the load collected (15) electricity consumption loop is transferred to center processor (8) by described voltage transformer (2) after voltage filter processor (3) process, the comparing of gathered voltage and setting voltage waveform in original system, analysis and process is completed, with supplementing of realizing that arc fault current in load circuit detects in center processor (8);
The input of described first current filtering processor (5) is connected with the output of the first current transformer (4), the input of described first current transformer (4) is connected in the electricity consumption loop of load (15), the load current collected is transferred in center processor (8) by described first current transformer (4) after described first current filtering processor (5) process, in described centring system (8), complete the analysis of load in series current waveform, compare and process, to realize the detection of series arc faults in load circuit;
The input of described second current filtering processor (7) is connected with the output of the second current transformer (6), the input of described second current transformer (6) is connected in parallel in the electricity consumption loop of load (15), the load current collected is transferred in center processor (8) by described second current transformer (6) after described second current filtering processor (7) process, in described centring system (8), complete the analysis of load parallel-current waveform, compare and process, to realize the detection of parallel arc fault and leakage current in load circuit;
The electric current collected, voltage signal compare by described center processor (8), analyze after, when breaking down, send AIS, described alarm lamp (9) sends arc fault and to report to the police instruction; Described center processor (8) sends actuating signal to described output driving circuit (10) simultaneously; output driving circuit (10) promotes the action of described dropout driving mechanism (11); described circuit breaker (13) in load circuit is threaded off, reaches the object of protection load (15).
2. protection device for arc faults according to claim 1; it is characterized in that: the input of described center processor (8) is also connected with reset setting device (1); after the arc fault process in load circuit terminates; press described reset setting device (1), realize the reset of protection device for arc faults.
CN201410630472.5A 2014-11-11 2014-11-11 Arc fault protection device Pending CN104332948A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410630472.5A CN104332948A (en) 2014-11-11 2014-11-11 Arc fault protection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410630472.5A CN104332948A (en) 2014-11-11 2014-11-11 Arc fault protection device

Publications (1)

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CN104332948A true CN104332948A (en) 2015-02-04

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105845514A (en) * 2016-05-19 2016-08-10 上海电科电器科技有限公司 Arc fault detection circuit breaker
CN107370124A (en) * 2016-05-13 2017-11-21 上海电科电器科技有限公司 Method for detecting arc
CN109301797A (en) * 2018-09-26 2019-02-01 安徽沁元科技发展有限公司 A kind of multifunctional protection device
CN109616891A (en) * 2018-12-21 2019-04-12 广东东捷实业有限公司 High-voltage board relay protection integrated automation device

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US6900972B1 (en) * 2001-04-09 2005-05-31 Leviton Manufacturing Co., Inc. Circuit interrupter with improved surge suppression
US20120098672A1 (en) * 2010-10-26 2012-04-26 Cooper Technologies Company ARC Fault Detection Method and Apparatus
CN202524053U (en) * 2012-04-18 2012-11-07 天津市鸿远电气设备有限公司 Electric arc failure protector
CN103999309A (en) * 2011-10-14 2014-08-20 真安全技术有限公司 System and integrated method for arc fault detection and interruption

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Publication number Priority date Publication date Assignee Title
US6900972B1 (en) * 2001-04-09 2005-05-31 Leviton Manufacturing Co., Inc. Circuit interrupter with improved surge suppression
US20120098672A1 (en) * 2010-10-26 2012-04-26 Cooper Technologies Company ARC Fault Detection Method and Apparatus
CN103999309A (en) * 2011-10-14 2014-08-20 真安全技术有限公司 System and integrated method for arc fault detection and interruption
CN202524053U (en) * 2012-04-18 2012-11-07 天津市鸿远电气设备有限公司 Electric arc failure protector

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107370124A (en) * 2016-05-13 2017-11-21 上海电科电器科技有限公司 Method for detecting arc
CN107370124B (en) * 2016-05-13 2019-05-03 上海电科电器科技有限公司 Method for detecting arc
CN105845514A (en) * 2016-05-19 2016-08-10 上海电科电器科技有限公司 Arc fault detection circuit breaker
CN109301797A (en) * 2018-09-26 2019-02-01 安徽沁元科技发展有限公司 A kind of multifunctional protection device
CN109616891A (en) * 2018-12-21 2019-04-12 广东东捷实业有限公司 High-voltage board relay protection integrated automation device

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Application publication date: 20150204

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