CN203324424U - Arc fault detection apparatus - Google Patents
Arc fault detection apparatus Download PDFInfo
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- CN203324424U CN203324424U CN2013203728967U CN201320372896U CN203324424U CN 203324424 U CN203324424 U CN 203324424U CN 2013203728967 U CN2013203728967 U CN 2013203728967U CN 201320372896 U CN201320372896 U CN 201320372896U CN 203324424 U CN203324424 U CN 203324424U
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Abstract
The utility model relates to an arc fault detection apparatus comprising a power supply, a signal collection processing unit, a central processing calculating unit, and a control output unit capable of controlling the on-off state of power of a load. The central processing calculating unit uses a load arc feather data base, a load arc type analytical engine, and a load arc determination processor to identify an arc and outputs a control signal to the control output unit to control connection and disconnection of the load. With utilization of the arc fault detection apparatus, a problems that the existing arc detection device can not distinguish a load feature in a loop and the arc in the loop can not be fully identified in the prior art can be effectively solved. Therefore, the arc fault detection apparatus that is capable of carrying out automatic adjustment based on the arc feature and fully identifying the arc is provided.
Description
Technical field
The utility model relates to a kind of arc fault sniffer, belongs to the circuit protection technical field.
Background technology
Electric arc is that electric current passes through the moment spark that insulating medium produces.Cut-off in atmosphere or sealing voltage when surpassing 10V, electric current and surpassing the circuit of 100MA, in the contact gap of electrical equipment, can produce electric arc.When electric arc occurs, can within the extremely short time, discharge huge energy.Metallic conductive element can be vaporized and be caused high-temperature steam and metal sharply to expand.Air and the rapid thermal expansion of metal vapour compound meeting cause the blast of the huge sound and huge pressure.And after electric arc produces, temperature raises suddenly, can make between arc gap gas occur heat from, aggravated again conversely the ionization of air molecule, electric arc is burnt away, thereby has strengthened the difficulty of extinguish arcs.Due to very high, the long-time continuity of temperature of electric arc, the combustible around very easily igniting forms fire, but the short-circuit current caused by electric arc is less, and not enough so that general isolating switch action tripping operation is cut off the electricity supply.Fault electric arc has become the one of the main reasons that causes electrical fire, serious harm the safety of popular lives and properties.Therefore fault electric arc is studied especially fault arc detection method research and is seemed particularly important.
Known by above-mentioned analysis, the generation of electric arc may make contact burn out when serious can to cause short circuit that security incident even occurs, therefore must adopt an effective measure and detect in time the circuit of leakage, could, rapidly by arc extinction, normally work to guarantee device for switching.Chinese utility model patent CN202230166U discloses a kind of fault electric arc detection module and detector for electric fire protection, for realize because of circuit void short, empty disconnected and fault electric arc that produce effectively detects and early warning, it gathers arc signal by the high-frequency signal sampling unit, and signal is transferred to signal processing unit is processed, finally the arc signal of handling well is transferred to the fault electric arc analytic unit, the fault electric arc analytic unit is collected arc signal, and the information of collection power supply collecting unit at zero point, distinguished arc, bad arc, if detect, be that bad arc will send alerting signal to the upper end CPU (central processing unit).Gather arc signal in this technical scheme by the high frequency sampling unit, contrast by the sample information with power supply collecting unit at zero point, analyze whether the electric arc leakage has occurred, but because the type of load is more, as capacitive load, resistive load etc., the load difference can cause the feature difference of electric arc, by its all with the sample information at described power supply zero point relatively, there is certain deviation in judgement to electric arc, therefore in this loop, there is deviation in detected electric arc, can not fully identify the electric arc that loop occurs, so just caused the security of this circuit to reduce, improved risk.
The utility model content
Technical problem to be solved in the utility model is that electric arc detecting device of the prior art can't be distinguished the load characteristic in loop, can not fully identify the problem of the electric arc in loop, thereby a kind of arc fault sniffer that can automatically adjust according to the characteristic of electric arc, fully identify electric arc is provided.
For solving the problems of the technologies described above, the utility model is achieved through the following technical solutions: a kind of arc fault sniffer comprises:
Power module: for described arc fault sniffer provides power supply;
Signal acquisition process unit: comprise that the current transformer be arranged in circuit under test, the residual current that described current transformer is sensed and excess current carry out the sample circuit of sampling processing and sampled signal is amplified to the amplifying circuit of processing;
Central authorities process arithmetic element, with described signal acquisition process unit, are connected, and the output signal of described signal acquisition process unit is carried out to calculation process,
Control output unit, process arithmetic element with described central authorities and be connected, according to described central authorities, process the signal sending controling instruction of arithmetic element and carry out make-break operation;
Described central authorities process arithmetic element and comprise:
Load arc characteristic storehouse: the type that stores load electric arc with and corresponding load arc characteristic curve and threshold value;
Load electric arc type analysis machine: the output signal to described signal acquisition process unit is carried out signature analysis, obtain load arc characteristic parameter, and the load arc characteristic curve in itself and described load telephony feature storehouse is contrasted, obtain the type of load electric arc;
Load electric arc decision processor: according to the type of described load electric arc, the current output valve of described signal acquisition process unit and described threshold value are compared, when surpassing threshold value to described control output unit output action signal.
Described central authorities process arithmetic element and adopt single-chip microcomputer.
Described sample circuit comprises sampling resistor, electric capacity and the clamp diode be arranged in parallel;
Described amplifying circuit comprises one-level amplifying circuit and secondary filtering and amplifying circuit, the second resistance that described one-level amplifying circuit comprises the first amplifier, is connected to the first resistance between described the first amplifier input cathode and output terminal and is connected to described the first amplifier input cathode; Described secondary filtering and amplifying circuit comprises the second amplifier, be connected to input cathode and the 3rd resistance between output terminal of described the second amplifier, be connected to the 4th resistance and filter capacitor of the input cathode of described the second amplifier, described the 4th resistance is connected with described the second resistance, one end of filter capacitor is connected to the output terminal of described the second amplifier, and the other end is connected to the link of described the second resistance and the 4th resistance.
Described control output unit comprises tripping controller and relay, and described tripping controller is connected with described relay, and described single-chip microcomputer output signal drives tripping controller to drive the described actuating of relay, changes the on off operating mode of circuit.
Described power module comprises AC/DC change-over circuit and DC/DC change-over circuit.
Comprise the communication processing unit with anti-surge circuit and photoelectric isolating circuit, described communication processing unit is connected, adopts two bus communication modes and host computer to carry out communication with described single-chip microcomputer.
Also comprise the man-machine conversation unit, described man-machine conversation unit is connected with described single-chip microcomputer; Described man-machine conversation unit comprises liquid crystal display and/or keyboard and/or hummer and/or pilot lamp.
Technique scheme of the present utility model has the following advantages compared to existing technology:
(1) arc fault sniffer described in the utility model, comprise that control output unit, signal acquisition process unit and the central authorities of energy control load power on/off process arithmetic element.Residual current and excess current in described signal acquisition process unit sampling loaded line, input signal described single-chip microcomputer after treatment; Described single-chip microcomputer is judged and is analyzed the information received, then send control signal for different testing results to described control output unit, change the power on/off state of described control output unit, and then the break-make of the loaded line that is connected with described control output unit of change, realize that the arc fault sniffer is surveyed in time and the blocking-up loaded line in the function of electric arc.Described central authorities process the single-chip microcomputer adopted in arithmetic element, after receiving the electric arc sampled signal of testing circuit, described single-chip microcomputer can be at first according to the relation of electric current and voltage at that time, use efficiently and accurately Fourier algorithm to carry out specificity analysis, obtain the parameters such as the phasing degree state of load and current spectrum, thereby judge the type of electric arc.Described single-chip microcomputer is distinguished according to arc characteristic the judgement of the type of fault electric arc.In order to judge the electric arc type that there are the various loads of different phase differential features as resistive load, inductive load, capacitive load etc., can store the arc characteristic of most loads in described single-chip microcomputer, and adopt the self study mode, in running status, the electric arc produced is carried out to real-time renewal.The arc characteristic of the load of various characteristics draws via a large amount of experiments and analysis.Effectively avoided electric arc detecting device in the prior art can't distinguish the load characteristic in loop, can not fully identify the problem of the electric arc in loop, thereby a kind of arc fault sniffer and the detection method thereof that can automatically adjust according to the characteristic of electric arc, fully identify electric arc is provided.
(2) in arc fault sniffer described in the utility model, described control output unit comprises tripping controller and relay.Described and described relay is connected, and described single-chip microcomputer output signal drives tripping controller to control the described actuating of relay, thereby changes the on off operating mode of circuit.While in described single-chip microcomputer decision circuitry, producing electric arc, can import one into to described relay and reach regulation requirement semaphore, described relay is because of this action change state of meeting, and then makes the described tripping controller be connected with it follow the change state, moves the loaded line disconnected.Described switching mode relay can go to control large electric current running with little electric current, and described tripping controller can the auto-action disconnecting circuit after connecting.So described tripping controller is connected cooperation with described relay, via described Single-chip Controlling, just can realize the purpose of automatic switching circuit, make the device circuit easy, easy operating.
(3) arc fault sniffer described in the utility model; described signal acquisition process unit comprises the current transformer that electric current is sampled, the overtension that prevents sampled signal or too low holding circuit and filter amplification circuit; residual current and excess current in described current transformer sampling loaded line, proportionally be transformed into the described holding circuit of input after direct current by it.If the overtension of sampled signal or too low, described holding circuit can be drawn unnecessary electric current the circuit of described arc fault sniffer, thereby protects the core circuit of described device.In the input subsequent conditioning circuit that the sampled signal of processing by described current transformer and described holding circuit can be safer, greatly reduce the device loss of described arc fault sniffer.
(4) arc fault sniffer described in the utility model, described filter amplification circuit comprises operational amplification circuit and filtering and amplifying circuit.Described holding circuit is inputted described operational amplification circuit by the safety signal after processing and is carried out the amplification of signal one-level, and signal is sent into described filtering and amplifying circuit after amplifying and carried out the second signal processing; Signal can send arc signal more accurately to central authorities' processing arithmetic element and judge processing after the filter amplifying processing of two-stage amplifying circuit.
(8) arc fault sniffer described in the utility model, described power module comprises AC/DC change-over circuit and DC/DC change-over circuit, described AC/DC change-over circuit is connected with described DC/DC change-over circuit.Described AC/DC change-over circuit converts alternating current to the rated direct voltage of described signal acquisition process unit and described man-machine conversation element circuit, and described DC/DC change-over circuit converts this DC voltage to rated direct voltage that described central authorities process arithmetic element and described communication processing unit.Described power module can complete change in voltage twice, can directly meet the different voltage requests of each circuit in described arc fault sniffer.
(5) arc fault sniffer described in the utility model comprises the communication processing unit with anti-surge circuit and photoelectric isolating circuit.Described communication processing unit is connected, adopts two bus communication modes and host computer to carry out communication with described single-chip microcomputer.Described communication processing unit has the superpower advantage of anti-electromagnetic interference capability, makes described arc fault sniffer when the communication by described self-defining two bus communication modes and host computer, compares by common RS485, CAN bus communication more stable.
(6) arc fault sniffer described in the utility model, described communication processing unit comprises receiving processing circuit and signal sending circuit, described receiving processing circuit and described signal sending circuit have Anti-surging and photoelectricity insulation blocking.Host computer sends the serial digital level controling signal to communication processing unit by two communication buses, this level controling signal, after described receiving processing circuit is sent into described CPU (central processing unit) analyzing and processing, is controlled described arc fault sniffer as control signal.The data-signal that described CPU (central processing unit) sends by described signal sending circuit processing after with serial digital current system and upper machine communication.If described arc fault sniffer detects electric arc, described signal sending circuit can be sent to data such as arc signals as host computers such as electrical fire monitoring devices in real time by self-defining two bus communication modes; Like this when fault electric arc occurs, described arc fault sniffer can play and the effect of alarm.
(7) arc fault sniffer described in the utility model comprises the man-machine conversation unit, and described man-machine conversation unit is connected with described single-chip microcomputer.Described man-machine conversation unit comprises liquid crystal and/or keyboard and/or hummer and/or pilot lamp.Described man-machine conversation unit can make the user check fault electric arc sniffer running status clear and intuitively and carry out the parameter setting, can realize Real-Time Monitoring controlled loop arc fault operational factor.Keyboard is set and completes well interactive input function.LED light indication fault arc detection device running status is set.Hummer prompting fault electric arc sniffer alarm condition is set.When warning is arranged, the fault electric arc sniffer sends the fire alarm acoustical signal and reminds the staff to solve in time processing, and this signal can manually be eliminated, when the alerting signal input is arranged again, the fire alarm acoustical signal can start again, and gives maintenance, until the fault electric arc sniffer resets.
The accompanying drawing explanation
For content of the present utility model is more likely to be clearly understood, below in conjunction with accompanying drawing, the utility model is described in further detail, wherein,
Fig. 1 is arc fault sniffer structural representation described in the utility model;
Fig. 2,3,4, the 5th, the circuit diagram of arc fault sniffer described in the utility model.
Embodiment
Embodiment 1:
The utility model provides a kind of arc fault sniffer, as shown in Figure 1, comprising:
(1) power module: for described arc fault sniffer provides power supply, described power module comprises AC/DC change-over circuit and DC/DC change-over circuit, and described AC/DC change-over circuit is connected with described DC/DC change-over circuit.
(2) signal acquisition process unit: comprise that the current transformer be arranged in circuit under test, the residual current that described current transformer is sensed and excess current carry out the sample circuit of sampling processing and sampled signal is amplified to the amplifying circuit of processing.Described sample circuit comprises sampling resistor, electric capacity and the clamp diode be arranged in parallel.Described amplifying circuit comprises one-level amplifying circuit and secondary filtering and amplifying circuit, the second resistance that described one-level amplifying circuit comprises the first amplifier, is connected to the first resistance between described the first amplifier input cathode and output terminal and is connected to described the first amplifier input cathode; Described secondary filtering and amplifying circuit comprises the second amplifier, be connected to input cathode and the 3rd resistance between output terminal of described the second amplifier, be connected to the 4th resistance and filter capacitor of the input cathode of described the second amplifier, described the 4th resistance is connected with described the second resistance, one end of filter capacitor is connected to the output terminal of described the second amplifier, and the other end is connected to the link of described the second resistance and the 4th resistance.
(3) central authorities process arithmetic element, with described signal acquisition process unit, are connected, and the output signal of described signal acquisition process unit is carried out to calculation process, and described central authorities process arithmetic element and adopt single-chip microcomputer, comprising:
(3.1) load arc characteristic storehouse: the type that stores load electric arc with and corresponding load arc characteristic curve and threshold value, described loadtype comprises resistive load, inductive load, capacitive load.
(3.2) load electric arc type analysis machine: the output signal to described signal acquisition process unit is carried out signature analysis, described characteristic analysis method is Fourier algorithm, obtain load arc characteristic parameter, described load arc characteristic parameter comprises phasing degree and current spectrum, and the load arc characteristic curve in itself and described load telephony feature storehouse is contrasted, obtain the type of load electric arc;
(3.3) load electric arc decision processor: according to the type of described load electric arc, the current output valve of described signal acquisition process unit and described threshold value are compared, when surpassing threshold value to described control output unit output action signal.
(4) control output unit, process arithmetic element with described central authorities and be connected, process the signal of arithmetic element according to described central authorities and carry out make-break operation; Described control output unit comprises and relay, and described tripping controller is connected with described relay, and described single-chip microcomputer output signal drives described tripping controller pilot relay action, thereby changes the on off operating mode of loaded line.
In addition, said apparatus also comprises the communication processing unit with anti-surge circuit and photoelectric isolating circuit, and described communication processing unit is connected, adopts two bus communication modes and host computer to carry out communication with described single-chip microcomputer; Described communication processing unit comprises receiving processing circuit and signal sending circuit, the control that host computer sends by two buses is sent into described CPU (central processing unit) by described receiving processing circuit, and the data-signal that described CPU (central processing unit) sends is processed with serial digital current system and upper machine communication through described signal sending circuit.In addition, described device comprises the man-machine conversation unit, and described man-machine conversation unit is connected with described single-chip microcomputer; Described man-machine conversation unit comprises liquid crystal display and/or keyboard and/or hummer and/or pilot lamp.
The arc fault detection method that the described arc fault sniffer of the present embodiment is corresponding, comprise the steps:
(1) be the unit power supply by power module, by AC/DC change-over circuit and DC/DC change-over circuit, provide unit required voltage;
(2) by current transformer, the residual current in circuit and excess current are detected, then the value detected is carried out to signal sampling through over-sampling circuit, then the signal after sampling is amplified to processing, and be transferred to central authorities' processing arithmetic element;
(3) described central authorities processing arithmetic element is carried out signature analysis to the output signal of described signal acquisition process unit, described characteristic analysis method is Fourier algorithm, then obtain load arc characteristic parameter, described load arc characteristic parameter comprises phasing degree and current spectrum.And the load arc characteristic curve in itself and described load telephony feature storehouse is contrasted, obtaining the type of load electric arc, described loadtype comprises resistive load, inductive load, capacitive load.According to the type of described load electric arc, the current output valve of described signal acquisition process unit and described threshold value are compared, when surpassing threshold value to described control output unit output action signal;
(4) process the signal sending controling instruction of arithmetic element and carry out make-break operation according to described central authorities.
Embodiment 2:
The described arc fault sniffer of the present embodiment, circuit diagram is as shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5, power module is the AC/DC change-over circuit, adopt the ACDC1 power supply changeover device to convert AC220V to the DC5V power supply for the electricity consumption of sniffer signal acquisition process, man-machine conversation unit, adopt the integrated LDO power module of UV3 to convert the DC5V power supply to the DC3.3V power supply and process arithmetic element, communication unit for central authorities.The signal acquisition process unit module is that high magnetic conducting nanocrystalline current transformer sample respectively residual current and the excess current of loaded line are selected in sampling, mutual inductor by sensor current signal by sampling resistor RS1, capacitor C S1, clamp diode DS1 processing of circuit.After sampling processing, signal is sent into the operational amplification circuit consisted of amplifier US1, resistance R S4, resistance R S6 and is carried out the amplification of signal one-level, send into after signal amplifies and form filtering and amplifying circuit by amplifier US2, resistance R S7, capacitor C S2 and carry out the second signal processing, finally send into central authorities and process arithmetic element 24HJ64GP506 single-chip microcomputer and carry out Fourier and resolve calculation process.Central authorities process in the arithmetic element module and adopt the PIC24HJ64GP506 single-chip microcomputer, and it is the 16bit High Performance SCM, and 40M has 53 programmable Is/O mouth, 12 hyperchannel autoscan A/D converters, Program Flash Memory64KB, SRAMsize8K.
The information that single-chip microcomputer will detect and receive is judged, is analyzed and processed, and realizes real time fail arc information and early warning, warning, control information demonstration and the sound and light of alarm of electrical fire-detector.After single-chip microcomputer receives the electric arc of testing circuit, output signal to described signal acquisition process unit is carried out signature analysis, obtain load arc characteristic parameter, and the load arc characteristic curve in itself and described load telephony feature storehouse is contrasted, obtain the type of load electric arc, then according to the type of described load electric arc, the current output valve of described signal acquisition process unit and described threshold value are compared, when surpassing threshold value to described control output unit output action signal.At this, single-chip microcomputer, at first according to the relation of electric current at that time and voltage, uses efficiently and accurately Fourier algorithm to carry out specificity analysis, obtains the parameters such as the phasing degree state of load and current spectrum, thereby judges the type of electric arc.The judgement of the type of fault electric arc is to distinguish according to arc characteristic.In order to meet the load of various characteristics, as resistive load, inductive load, capacitive load, they have different phase differential features, need a large amount of experiment basis to draw the load arc characteristic, most load arc characteristic is analyzed, it is stored in single-chip microcomputer.So just set up load arc characteristic storehouse, the type that wherein stores load electric arc with and corresponding load arc characteristic curve and threshold value.By adopting the self study mode, in running status, the electric arc produced is carried out to real-time renewal like this.In the man-machine conversation unit, for facilitate the user clear and intuitive check fault electric arc sniffer running status and carry out the parameter setting, system is provided with the complete Chinese liquid crystal display of LCD, can realize Real-Time Monitoring controlled loop arc fault operational factor.Keyboard is set and completes well interactive input function.LED light indication fault arc detection device running status is set.Hummer prompting fault electric arc sniffer alarm condition is set.
When warning is arranged, the fault electric arc sniffer sends the fire alarm acoustical signal and reminds the staff to solve in time processing, and this signal can manually be eliminated, when the alerting signal input is arranged again, the fire alarm acoustical signal can start again, and gives maintenance, until the fault electric arc sniffer resets.When sampling fault electric arc information surpasses the value of setting, sniffer output alarm protection output, dropout output signal drive the actuating of relay.Control output and adopt switching mode relay, contact capacity 250V AC/5A.In the communication processing unit module, the arc fault sniffer is sent to electrical fire monitoring device by self-defining two bus communication modes in real time by data such as arc signals.Can reach alarm by fault electric arc as found.Host computer sends serial digital level 0V by communication bus L1, L2 or the 24V control signal arrives sniffer, control signal, after the receiving processing circuit be comprised of resistance, electric capacity, diode, stabilivolt, triode, optocoupler UP1, UP2, then is controlled sniffer after sending into the CPU (central processing unit) analyzing and processing.
The CPU (central processing unit) of sniffer sends the signal sending circuit processing that data-signal forms by resistance R P1, RP2, RP3, RP4 and optocoupler UP1, UP2, with serial digital current system and upper machine communication.Communication processing unit adopts the two-way surge diode of TVS1 surging prevention; the photoelectric isolating circuit that optocoupler UP1, UP2, UP3, UP4 form; these self-defining two bus communication modes make that sniffer is compared common RS485 with host communication, the CAN bus communication is more stable, the advantage that anti-electromagnetic interference capability is superpower.
Obviously, above-described embodiment is only for example clearly is described, and is not the restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.And among the protection domain that the apparent variation of being extended out thus or change are still created in the utility model.
Claims (7)
1. an arc fault sniffer, is characterized in that, comprising:
Power module: for described arc fault sniffer provides power supply;
Signal acquisition process unit: comprise that the current transformer be arranged in circuit under test, the residual current that described current transformer is sensed and excess current carry out the sample circuit of sampling processing and sampled signal is amplified to the amplifying circuit of processing;
Central authorities process arithmetic element, with described signal acquisition process unit, are connected, and the output signal of described signal acquisition process unit is carried out to calculation process, and described central authorities process arithmetic element and comprise:
Load arc characteristic storehouse: the type that stores load electric arc with and corresponding load arc characteristic curve and threshold value;
Load electric arc type analysis machine: the output signal to described signal acquisition process unit is carried out signature analysis, obtain load arc characteristic parameter, and the load arc characteristic curve in itself and described load telephony feature storehouse is contrasted, obtain the type of load electric arc;
Load electric arc decision processor: according to the type of described load electric arc, the current output valve of described signal acquisition process unit and described threshold value are compared, when surpassing threshold value to described control output unit output action signal;
Control output unit, process arithmetic element with described central authorities and be connected, according to described central authorities, process the signal sending controling instruction of arithmetic element and carry out make-break operation.
2. arc fault sniffer according to claim 1, is characterized in that, described central authorities process arithmetic element and adopt single-chip microcomputer.
3. arc fault sniffer according to claim 1 and 2, is characterized in that described sample circuit comprises sampling resistor, electric capacity and the clamp diode be arranged in parallel;
Described amplifying circuit comprises one-level amplifying circuit and secondary filtering and amplifying circuit, the second resistance that described one-level amplifying circuit comprises the first amplifier, is connected to the first resistance between described the first amplifier input cathode and output terminal and is connected to described the first amplifier input cathode; Described secondary filtering and amplifying circuit comprises the second amplifier, be connected to input cathode and the 3rd resistance between output terminal of described the second amplifier, be connected to the 4th resistance and filter capacitor of the input cathode of described the second amplifier, described the 4th resistance is connected with described the second resistance, one end of filter capacitor is connected to the output terminal of described the second amplifier, and the other end is connected to the link of described the second resistance and the 4th resistance.
4. according to the described arc fault sniffer of any one in claim 3, it is characterized in that, described control output unit comprises tripping controller and relay, described tripping controller is connected with described relay, described single-chip microcomputer output signal drives tripping controller to drive the described actuating of relay, changes the on off operating mode of circuit.
5. according to the described arc fault sniffer of any one in claim 4, it is characterized in that, described power module comprises AC/DC change-over circuit and DC/DC change-over circuit.
6. according to the described arc fault sniffer of any one in claim 5, it is characterized in that, also comprise the communication processing unit with anti-surge circuit and photoelectric isolating circuit, described communication processing unit is connected, adopts two bus communication modes and host computer to carry out communication with described single-chip microcomputer.
7. according to the described arc fault sniffer of any one in claim 1 or 2 or 3 or 4 or 5 or 6, it is characterized in that, also comprise the man-machine conversation unit, described man-machine conversation unit is connected with described single-chip microcomputer; Described man-machine conversation unit comprises liquid crystal display and/or keyboard and/or hummer and/or pilot lamp.
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| CN2013203728967U CN203324424U (en) | 2013-06-26 | 2013-06-26 | Arc fault detection apparatus |
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| CN2013203728967U CN203324424U (en) | 2013-06-26 | 2013-06-26 | Arc fault detection apparatus |
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| CN203324424U true CN203324424U (en) | 2013-12-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278734A (en) * | 2013-06-26 | 2013-09-04 | 浙江爱德电子有限公司 | Arc fault detection device and detection method thereof |
| CN108700634A (en) * | 2016-01-25 | 2018-10-23 | 通用电气航空系统有限公司 | Circuit for detecting arc fault and method |
-
2013
- 2013-06-26 CN CN2013203728967U patent/CN203324424U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278734A (en) * | 2013-06-26 | 2013-09-04 | 浙江爱德电子有限公司 | Arc fault detection device and detection method thereof |
| CN103278734B (en) * | 2013-06-26 | 2016-01-20 | 浙江爱德电子有限公司 | A kind of arc fault sniffer and detection method thereof |
| CN108700634A (en) * | 2016-01-25 | 2018-10-23 | 通用电气航空系统有限公司 | Circuit for detecting arc fault and method |
| US10830808B2 (en) | 2016-01-25 | 2020-11-10 | Ge Aviation Systems Limited | Circuit and method for detecting arc faults |
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Granted publication date: 20131204 Termination date: 20160626 |