CN203630272U - Arc fault detection circuit - Google Patents
Arc fault detection circuit Download PDFInfo
- Publication number
- CN203630272U CN203630272U CN201320778610.5U CN201320778610U CN203630272U CN 203630272 U CN203630272 U CN 203630272U CN 201320778610 U CN201320778610 U CN 201320778610U CN 203630272 U CN203630272 U CN 203630272U
- Authority
- CN
- China
- Prior art keywords
- arc
- circuit
- signal
- electric arc
- fault detection
- Prior art date
- 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.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The utility model provides an arc fault detection circuit, and the circuit comprises: an arc detection circuit which is used for detecting an arc of a supply line, and outputs a first signal; an arc screening circuit which is electrically connected with the output end of the arc detection circuit, is used for eliminating a signal, not related to the arc, in the first signal, and outputs a second signal; and an arc processing circuit which is electrically connected with the output end of the arc detection circuit, is used for a third signal indicating an arc fault based on the received second signal. The circuit provided by the utility model achieves the arc detection through employing an analog circuit. Compared with a conventional product employing a digital circuit, the circuit provided by the utility model is high in precision, is low in cost, is low in power consumption, and is high in speed.
Description
Technical field
The utility model generally relates to Electrical Safety protection field, more specifically, relates to a kind of circuit that can accurately detect and differentiate arc fault.
Background technology
At present, due to user connect up reason or household electrical appliance inside L line between N line, L line between L line, L line when producing fault electric arc between ground wire, hold the situations such as fire hazardous, the property to people and life have formed great threat.Have at present few product for arc fault detection, but mostly adopt digital circuit, Micro-processor MCV etc. to complete, the reliability of these products is not strong.For example, digital circuit or MCU, in the time receiving the signal of detection, when detection signal is strong not, when like the non-arcuation state of arc, tend to allow circuit judge by accident, can not correctly identify electric arc and non-arc signal.In addition, the detection of arc signal, also can be subject to crosstalking and the impact of electromagnetic interference (EMI) of various electrical appliance loads, equally also can cause some erroneous judgements.
Therefore, need badly a kind of reliability high, can accurately detect arc signal and realize the circuit of corresponding power supply protection.
Utility model content
For above problem, the utility model provides a kind of circuit that can accurately detect arc signal and realize corresponding power supply protection.
According to first aspect of the present utility model, a kind of arc fault detection circuit is provided, comprising: arc detection circuitry, for detection of the electric arc on supply lines, and export first signal; Electric arc screening circuit, is electrically connected with the output terminal of described arc detection circuitry, for removing the irrelevant signal of described first signal and electric arc, and exports secondary signal; Electric arc treatment circuit, is electrically connected with the output terminal of described arc detection circuitry, produces for the described secondary signal based on receiving the 3rd signal that characterizes arc fault.
According to an embodiment of the present utility model, described electric arc treatment circuit comprises: electric arc amplification module, for amplifying received described secondary signal; Electric arc trigger module, is electrically connected with the output terminal of described electric arc amplification module, and the described secondary signal based on after amplifying produces described the 3rd signal of vibration.
So, can make the secondary signal that original amplitude is less there is certain driving force.
According to an embodiment of the present utility model, described electric arc amplification module comprises at least one linear amplifier.
According to an embodiment of the present utility model, described electric arc amplification module comprises the linear operational amplifier of two cascades.
So, can, step by step by amplifying secondary signal, reduce the requirement to operational amplifier, improve the reliability of circuit.
According to an embodiment of the present utility model, described electric arc trigger module comprises at least one oscillator.
According to an embodiment of the present utility model, described oscillator comprises at least one operational amplifier or at least one 555 timer.
According to an embodiment of the present utility model, described electric arc trigger module comprises at least one logic gates.
According to an embodiment of the present utility model, described arc detection circuitry comprises at least one arc-detection ring, and wherein, in the time inputing to described arc-detection circular current and be at least 1A, it can export at least voltage of 0.5V.
So, whether arc detection circuitry can accurately detect electric arc and exist, and in the time that output has certain amplitude, can be convenient to the use of subsequent conditioning circuit, has reduced design difficulty.
According to an embodiment of the present utility model, described electric arc screening circuit comprises: Voltage stabilizing module, be electrically connected with described arc detection circuitry, for exporting periodic voltage signal corresponding with described first signal, that have several values, the phase place of wherein said periodic voltage signal is consistent; Phase shift module, is electrically connected with the output terminal of described Voltage stabilizing module, for extracting described secondary signal from described periodic voltage signal.
So, this periodic voltage signal can accurately reflect the defeated output voltage of periodicity of arc-detection ring, and then facilitates subsequent conditioning circuit to screen.
According to an embodiment of the present utility model, the RC differentiating circuit that described phase shift module is at least two-stage.
So, the higher frequency signals relevant to electric arc can be chosen out.
According to an embodiment of the present utility model, described arc fault detection circuit comprises: arc fault driving circuit, comprise at least one solenoid, and be electrically connected with described electric arc treatment circuit, for producing switch controlling signal based on described the 3rd signal; On-off circuit, is electrically connected with described arc fault driving circuit, for disconnecting according to described switch controlling signal or the I/O switch of closed described supply lines.
According to an embodiment of the present utility model, described arc fault detection circuit comprises: simulation electric arc hookup, its output terminal is connected to described electric arc screening circuit or electric arc treatment circuit, for generation of simulation arc signal, thereby make described on-off circuit disconnect the I/O switch of described supply lines according to described simulation arc signal.
According to an embodiment of the present utility model, described simulation electric arc hookup comprises that test switch that user can contact and oscillation frequency are more than or equal to the arc converter of 100Hz, wherein, whether described simulation electric arc hookup exports described simulation arc signal according to the Determines of described test switch.
So, just can simulate arc signal, thereby each modular circuit is detected.
According to an embodiment of the present utility model, described arc converter comprises at least one operational amplifier or at least one 555 oscillator or at least one RC oscillatory circuit or at least one LC oscillatory circuit.
According to an embodiment of the present utility model, in described LC oscillatory circuit, by described solenoid as inductance element.
So, this LC oscillatory circuit has adopted minimum element and has realized inductance element multiplexing, can effectively reduce volume, heat radiation and the cost of product.
According to an embodiment of the present utility model, described arc fault detection circuit also comprises: power-supplying circuit, it comprises rectifier bridge, solenoid, is used to described electric arc treatment circuit, arc fault driving circuit and simulation electric arc hookup that power supply is provided.
According to an embodiment of the present utility model, described arc fault driving circuit comprises thyristor, and described silicon controlled control end is electrically connected with the output terminal of described electric arc treatment circuit.
The utility model is mainly by adopting mimic channel to realize arc-detection, compared to the product of traditional employing digital circuit, the utlity model has that precision is high, cost is low, power consumption is little and fireballing feature.
Accompanying drawing explanation
After the description below with reference to the given embodiment of the present utility model of following accompanying drawing, will understand better the utility model, and other objects of the present utility model, details, feature and advantage will become more apparent.In the accompanying drawings:
Fig. 1 is the system architecture diagram of arc fault detection circuit;
Fig. 2 a is the schematic diagram according to the arc fault detection circuit of an embodiment of the utility model;
Fig. 2 b is the arc fault oscillogram according to an embodiment of the utility model;
Fig. 2 c is the schematic diagram according to the arc fault detection circuit of another embodiment of the utility model;
Fig. 3 a is the schematic diagram according to the arc fault detection circuit of another embodiment of the utility model;
Fig. 3 b is the arc fault oscillogram according to another embodiment of the utility model;
Fig. 3 c is the schematic diagram according to the arc fault detection circuit of another embodiment of the utility model.
Embodiment
Preferred implementation of the present disclosure is described below with reference to accompanying drawings in more detail.Although shown preferred implementation of the present disclosure in accompanying drawing, but should be appreciated that, can realize the disclosure and the embodiment that should do not set forth limits here with various forms.On the contrary, it is in order to make the disclosure more thorough and complete that these embodiments are provided, and can be by the those skilled in the art that conveys to complete the scope of the present disclosure.
Fig. 1 is the system architecture diagram of arc fault detection circuit.This arc fault detection circuit bag comprises: power-supplying circuit 1, arc fault driving circuit 2, on-off circuit 3, simulation electric arc hookup 4, arc-detection ring 5, mu balanced circuit 6, RC phase-shift network circuit 7 and electric arc treatment of simulated circuit 8, wherein, electric arc treatment of simulated circuit 8 comprises the first amplifying circuit 9, the second amplifying circuit 10, the first trigger circuit 11 and the second trigger circuit 14.
In the time that circuit is normally worked the generation of non-fault electric arc, the voltage transmission waveform on L, N line is regular sine wave.When because circuit or electrical appliance while breaking down, produce electric arc in alternating circuit.In the present embodiment, this electric arc is the electric arc between L, N line.Now, be serially connected in arc-detection ring 5 on L line by detect and output packet containing the first signal of this arc signal.Be understandable that, first signal at least comprises two parts: the 1) voltage signal corresponding with produced electric arc; 2) submit the corresponding voltage signal of flow transmission with L line.
Before switch 3 power supply disconnects, arc-detection ring 5 by continue transmission first signal to the mu balanced circuit 6 of its coupling, thereby the amplitude of first signal can be limited, and has reduced the requirement to subsequent process circuit, has also increased the security of circuit.
In order to increase the sensitivity of arc-detection ring 5, it can adopt the permeability magnetic material of sheet to reel and form, for example, and silicon steel or silicon steel.In the time that the input current of arc-detection ring 5 is 1A, it can at least produce the voltage of 0.5V.
Phase-shift network circuit 7 screens for only relevant to this electric arc signal for the first signal of the output from mu balanced circuit 6, in filtering first signal, submits the corresponding voltage signal of flow transmission with L line.Then, phase-shift network circuit 7 is by only relevant to this electric arc signal, i.e. secondary signal, transfers to electric arc treatment of simulated circuit 8.
Subsequently, by electric arc treatment of simulated circuit 8, received secondary signal is processed, and produced the 3rd signal for triggering arc fault driving circuit 2, thereby change the connection status of L, N line.Obviously, the 3rd signal can characterize the electric arc between L, N line.
Preferably, whether have the performance of job failure or test modules in order to allow user can understand arc fault detection circuit, the present embodiment also comprises simulation electric arc hookup 4.In Fig. 1, the output terminal of this circuit is coupled to phase-shift network circuit 7, thereby in the time that simulation electric arc hookup 4 sends simulation arc signal according to user's demand, phase-shift network circuit 7 will be selected the signal relevant to arc fault from the simulation arc signal receiving, and then is sent to electric arc treatment of simulated circuit 8.If arc fault driving circuit 2 can, according to the mould simulation electric arc signal cut L receiving, the confession electrical transmission of N line, illustrate that the circuit working between RC phase-shift network circuit 7 and arc fault driving circuit 2 is normal, do not break down.
It will be understood by those skilled in the art that, the output terminal of simulation electric arc hookup 4 also can be connected to a module in mu balanced circuit 6 or electric arc treatment of simulated circuit 8, thereby can once test multiple circuit modules, so, be very easy to the judgement of fault, be convenient to follow-up repair and maintenance (R and M).
Fig. 2 a is the schematic diagram according to the arc fault detection circuit of an embodiment of the utility model; Fig. 2 b is the arc fault oscillogram according to an embodiment of the utility model.
The coiling two ends of arc-detection ring 5 are connected by capacitor C 2, and export the voltage signal of generation to Voltage stabilizing module 6.Voltage stabilizing module 6 comprises current-limiting resistance R5, stabilivolt ZD2 and diode D5, and wherein, diode D5 passes through for the voltage signal that limits minus phase.
In the time of normal work non-fault electric arc, the waveform on L line is complete sinusoidal waveform, and in the time producing arc fault, the voltage waveform of L line output produces disappearance.Accordingly, in the time producing arc fault, the output of current detecting ring 5 also will produce corresponding variation, and as shown in the right part in Fig. 2 b, the output waveform of current detecting ring 5 becomes sharp-pointed and produced burr, and obviously, this burr is the signal relevant to arc fault.Due to the selection effect of diode D5 to phase of output signal, the output of Voltage stabilizing module 6 will only comprise the signal of positive phase, and this signal can reflect the output characteristics of arc-detection ring 5.Phase-shift network circuit 7 is made up of the RC differentiating circuit of three grades, comprises resistance R 6, R23, R24 and capacitor C 3, C11, C12.By this differentiating circuit, can carry out corresponding phase shift to received signal, there is desired phase and frequency and the signal corresponding with arc fault thereby select, and export next stage circuit to.
Preferably, in the time that ac frequency is 50-60Hz, phase-shift network circuit 7 is configured to remove the signal below 60Hz, thereby retains the signal that is greater than 60Hz.
It will be understood by those skilled in the art that, the implementation of mu balanced circuit 6, phase-shift network circuit 7 is not limited only to above-mentioned form, for example, these two circuit all can be made up of at least one operational amplifier, or phase-shift network circuit 7 can also be made up of etc. RC circuit more than two-stage at least.
In the present embodiment, electric arc treatment of simulated circuit 8 comprises the first amplifying circuit 9, the second amplifying circuit 10, the first trigger circuit 11 and the second trigger circuit 12.Wherein, the first amplifying circuit 9, for the linear amplifier that forward amplifies, comprises amplifier OP1, resistance R 7-R9; The second amplifying circuit 10 is the linear amplifier oppositely amplifying, and comprises OP2, C4, R10-R12.The positive input of amplifier OP1 is coupled to the output of phase-shift network circuit 7, and the output of OP1 is coupled to the reverse input end of OP2 by capacitor C 4.Therefore, when static, the first amplifying circuit 9 output low levels, the second 10 of amplifying circuits output high level.The reverse impulse of the amplifier 10 in Fig. 2 b increases gradually, and this is because the performance of amplifier self causes.In amplifier inside, compared to positive input, amplifier reverse input end to output often needs through more node, when amplifier is while being dynamic from static conversion, the working current of amplifier need to charge to the electric capacity of these Nodes, and therefore, the output of OP2 will increase gradually.
It will be appreciated by persons skilled in the art that first and second amplification module can be also the amplifier of other types, is not limited in linear amplifier.
The first trigger circuit 11 are monostable circuits, comprise amplifier OP3, resistance R 13-15, capacitor C 5 and diode D6, and the reverse input end of amplifier OP3 is coupled to the anode of diode D6, and the output terminal of amplifier OP2 is coupled to the negative electrode of diode D6.In the time of OP2 output high level, diode D6 cut-off, when the anti-phase output of OP2, while being output low level, diode D6 conducting, the voltage of the reverse input end of the amplifier OP3 in the first trigger module 11 will produce sudden change, from high level bust to low level, thereby cause output signal upset.Along with periodically output low level signal of amplifier OP2, OP3 is output pulse signal periodically.
The second trigger module 12 comprises amplifier OP4, and its positive input is connected to the output terminal of amplifier OP3 by diode D8, resistance R 17, and the second trigger module 12 is exported the pulse signal that driving force is larger.
It will be appreciated by persons skilled in the art that first and second trigger module except being the oscillator that amplifier forms, can be also the oscillator that comprises 555 timers.
Arc fault driving circuit 2 comprises solenoid SOL, controllable silicon SCR, capacitor C 10 resistance R 21 and R22.The output terminal of amplifier OP4 is connected to silicon controlled control end by resistance R 21, thereby the signal that can receive according to it is controlled arc fault driving circuit 2.That is to say, by the whether conducting of OP4 output pulse signal control controllable silicon SCR.In the time of controllable silicon SCR conducting, I/O on-off circuit 3 will disconnect electric power and connect, and solenoid SOL flows through larger electric current, and then produces magnetic force, and its inner iron core disconnects on-off circuit 3 movement.
By said process, arc detection circuitry has completed the flow process from " detection arc signal " to " disconnecting electric power connects ".
Arc detection circuitry also comprises simulation electric arc hookup 4, it simulates arc signal for the input that responds user to produce, can disconnect electric power connection according to this electric arc simulating signal thereby detect this arc detection circuitry, and then whether each module of decision circuitry there is fault.
Preferably, simulation electric arc hookup 4 is connected with Voltage stabilizing module 6, phase shift module 7, electric arc processing module 8 by multigang switch, thereby user can be as required, selects corresponding module to test.
Preferably, simulation electric arc hookup 4 produces the electric arc simulating signal that oscillation frequency is more than or equal to 100Hz.
The way of realization of simulation electric arc hookup 4 can have multiple.Simulation electric arc hookup 4 in Fig. 2 a comprises two triode Q1, the Q2 and the testing button that form positive feedback.In the time that user presses testing button, the collector of triode Q2 will produce the simulating signal of an electric arc, and is exported to phase shift module 7.
In addition, arc fault detection circuit also comprises power-supplying circuit 1, and it comprises rectifier bridge M7, solenoid SOL, is used to electric arc treatment circuit, arc fault driving circuit and simulation electric arc hookup that power supply is provided.
Other ways of realization of simulation electric arc hookup 4 will be described further in conjunction with integrated circuit below.
Fig. 2 c is the schematic diagram according to the arc fault detection circuit of another embodiment of the utility model.That in the figure, arc detection circuitry comprises two magnetic test coil CT5, is serially connected in respectively on phase line L1, L2 with the difference of Fig. 2 a.In this embodiment, arc detection circuitry is for detection of the electric arc on phase line L1, L2, and in the time of phase line L1 and/or the upper generation of L2 electric arc, arc detection circuitry will disconnect electric power according to the signal detecting and connect.
In the time producing electric arc on L1, L2, now two detection signals will superpose at same node simultaneously, but due to the pressure stabilization function of current-limiting resistance R5 and stabilivolt ZD2, the output valve of Voltage stabilizing module 6 still can be limited at certain scope.Therefore, Voltage stabilizing module 6 has promoted stability and the applicability of circuit.
Fig. 3 a is the schematic diagram according to the arc fault detection circuit of another embodiment of the utility model.Fig. 3 b is the arc fault oscillogram according to another embodiment of the utility model.Different from Fig. 2 a, amplifier OP1, OP2 be for being connected, therefore also contrary with Fig. 2 a of the connected mode of diode D26.
When work, in the time of amplifier OP2 output high level, diode D26 conducting, thereby make the output direct impulse of amplifier OP3, subsequently, this direct impulse has promoted driving force by the effect of the second trigger module 12, and then can control controllable silicon SCR, make its conducting.
In this embodiment, simulation electric arc test circuit 4 comprises test button TEST, capacitor C 14, stabilivolt ZD8, stabilivolt ZD9, resistance R 25, resistance R 26 and R28.In the time that user presses test button TEST, simulation electric arc test circuit 4 will produce periodic voltage signal, i.e. the simulating signal of electric arc, thus can detect corresponding module.Because the simulating signal of electric arc is to be applied directly on phase-shift network circuit 7, therefore, stabilivolt ZD9 is for limiting the amplitude of this simulating signal.
Fig. 3 c is the schematic diagram according to the arc fault detection circuit of another embodiment of the utility model.Different from Fig. 3 a, the first trigger module 11 is for having the monostable circuit of amplitude limit function.
Simulation electric arc test circuit 4 comprises solenoid SOL, capacitor C 14, stabilivolt ZD9 and test button TEST.Obviously, solenoid SOL and capacitor C 14 have formed LC series resonant circuit, same, and stabilivolt ZD9 is for limiting the amplitude of output signal.Simulation electric arc test circuit 4 in Fig. 3 c, has adopted minimum element and has realized inductance element multiplexing, therefore, all helpful for volume, heat radiation, the cost of product.
The implementation that it will be appreciated by persons skilled in the art that simulation electric arc test circuit 4 is not limited only to above-mentioned form, can also be made up of at least one operational amplifier or 555 timers.
The utility model is mainly by adopting mimic channel to realize arc-detection, compared to the product of traditional employing digital circuit, the utlity model has that precision is high, cost is low, power consumption is little and fireballing feature.
Those of ordinary skills it is also understood that various exemplary logical block, module, circuit and the algorithm steps described in conjunction with the application's embodiment can be embodied as electronic hardware, computer software or the combination of the two.In order clearly to represent this interchangeability between hardware and software, various exemplary parts, piece, module, circuit and step are all carried out to general description around its function above.Be embodied as hardware or be embodied as software as for this function, depend on specific application and be applied to the design constraint in whole system.Those skilled in the art can, for every kind of application-specific, realize described function in flexible mode, still, thisly realize decision-making and should not be construed as and deviate from protection domain of the present utility model.
Claims (17)
1. an arc fault detection circuit, is characterized in that, comprising:
Arc detection circuitry, for detection of the electric arc on supply lines, and exports first signal;
Electric arc screening circuit, is electrically connected with the output terminal of described arc detection circuitry, for removing the irrelevant signal of described first signal and electric arc, and exports secondary signal;
Electric arc treatment circuit, is electrically connected with the output terminal of described arc detection circuitry, produces for the described secondary signal based on receiving the 3rd signal that characterizes arc fault.
2. arc fault detection circuit as claimed in claim 1, is characterized in that, described electric arc treatment circuit comprises:
Electric arc amplification module, for amplifying received described secondary signal;
Electric arc trigger module, is electrically connected with the output terminal of described electric arc amplification module, and the described secondary signal based on after amplifying produces described the 3rd signal of vibration.
3. arc fault detection circuit as claimed in claim 2, is characterized in that, described electric arc amplification module comprises at least one linear amplifier.
4. arc fault detection circuit as claimed in claim 2, is characterized in that, described electric arc amplification module comprises the linear operational amplifier of two cascades.
5. arc fault detection circuit as claimed in claim 2, is characterized in that, described electric arc trigger module comprises at least one oscillator.
6. arc fault detection circuit as claimed in claim 5, is characterized in that, described oscillator comprises at least one operational amplifier or at least one 555 timer.
7. arc fault detection circuit as claimed in claim 2, is characterized in that, described electric arc trigger module comprises at least one logic gates.
8. arc fault detection circuit as claimed in claim 1, is characterized in that, described arc detection circuitry comprises at least one arc-detection ring, and wherein, in the time inputing to described arc-detection circular current and be at least 1A, it can export at least voltage of 0.5V.
9. arc fault detection circuit as claimed in claim 1, is characterized in that, described electric arc screening circuit comprises:
Voltage stabilizing module, is electrically connected with described arc detection circuitry, and for exporting periodic voltage signal corresponding with described first signal, that have several values, the phase place of wherein said periodic voltage signal is consistent;
Phase shift module, is electrically connected with the output terminal of described Voltage stabilizing module, for extracting described secondary signal from described periodic voltage signal.
10. arc fault detection circuit as claimed in claim 9, is characterized in that, the RC differentiating circuit that described phase shift module is at least two-stage.
11. arc fault detection circuit as claimed in claim 9, is characterized in that, also comprise:
Arc fault driving circuit, comprises at least one solenoid, is electrically connected, for producing switch controlling signal based on described the 3rd signal with described electric arc treatment circuit;
On-off circuit, is electrically connected with described arc fault driving circuit, for disconnecting according to described switch controlling signal or the I/O switch of closed described supply lines.
12. arc fault detection circuit as claimed in claim 11, is characterized in that, also comprise:
Simulation electric arc hookup, its output terminal is connected to described electric arc screening circuit or electric arc treatment circuit, for generation of simulation arc signal, thereby makes described on-off circuit disconnect the I/O switch of described supply lines according to described simulation arc signal.
13. arc fault detection circuit as claimed in claim 12, it is characterized in that, described simulation electric arc hookup comprises that test switch that user can contact and oscillation frequency are more than or equal to the arc converter of 100Hz, wherein, whether described simulation electric arc hookup exports described simulation arc signal according to the Determines of described test switch.
14. arc fault detection circuit as claimed in claim 12, is characterized in that, described arc converter comprises at least one operational amplifier or at least one 555 timer or at least one RC oscillatory circuit or at least one LC oscillatory circuit.
15. arc fault detection circuit as claimed in claim 14, is characterized in that, in described LC oscillatory circuit, by described solenoid as inductance element.
16. arc fault detection circuit as claimed in claim 11, is characterized in that, also comprise:
Power-supplying circuit, it comprises rectifier bridge, described solenoid, is used to described electric arc treatment circuit, arc fault driving circuit and simulation electric arc hookup that power supply is provided.
17. arc fault detection circuit as claimed in claim 11, is characterized in that, described arc fault driving circuit comprises thyristor, and described silicon controlled control end is electrically connected with the output terminal of described electric arc treatment circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320778610.5U CN203630272U (en) | 2013-12-02 | 2013-12-02 | Arc fault detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320778610.5U CN203630272U (en) | 2013-12-02 | 2013-12-02 | Arc fault detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203630272U true CN203630272U (en) | 2014-06-04 |
Family
ID=50816734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320778610.5U Withdrawn - After Issue CN203630272U (en) | 2013-12-02 | 2013-12-02 | Arc fault detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203630272U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104678254A (en) * | 2013-12-02 | 2015-06-03 | 益而益(集团)有限公司 | Arc fault detection circuit |
| CN105334425A (en) * | 2014-06-13 | 2016-02-17 | 益而益(集团)有限公司 | Arc fault detection apparatus |
-
2013
- 2013-12-02 CN CN201320778610.5U patent/CN203630272U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104678254A (en) * | 2013-12-02 | 2015-06-03 | 益而益(集团)有限公司 | Arc fault detection circuit |
| CN105334425A (en) * | 2014-06-13 | 2016-02-17 | 益而益(集团)有限公司 | Arc fault detection apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20140091808A1 (en) | Contact separation detector and methods therefor | |
| CN110034539B (en) | Fault protection method and wireless power transmission device applicable to same | |
| CN104539165A (en) | Capacitive mode detection circuit and method for resonant converter and resonant converter | |
| CN103499736A (en) | Over-current detection circuit and over-current protection circuit | |
| CN107092213B (en) | Passive filtering device and method with fault arc detection function | |
| CN206573677U (en) | Signal generator and the straight-flow system insulation fault location instrument based on it | |
| CN207301228U (en) | A kind of electric-leakage detection circuit based on intelligent electric meter | |
| CN104577976B (en) | Arc fault protection device and control method thereof | |
| CN203811739U (en) | Phase-to-ground fault detection apparatus | |
| CN203630272U (en) | Arc fault detection circuit | |
| CN104678254A (en) | Arc fault detection circuit | |
| CN104421477A (en) | Proportional valve control device used for anesthesia machine | |
| CN106099857A (en) | Detection zero-sequence current pulse width conforming ferromagnetic resonance harmonic elimination method | |
| CN203522134U (en) | Arc fault protection device | |
| CN102707179A (en) | Fault detection device for inverter | |
| CN104795827A (en) | Switching circuit of energy-storing inverter and grid-connection/off-grid switching method and device thereof | |
| CN104423292A (en) | X capacitor bleeding control method and circuit | |
| CN207964926U (en) | A kind of residual current detection circuit | |
| CN206946244U (en) | A kind of passive filtration unit with fault electric arc detection function | |
| CN205945024U (en) | Ferroresonance harmonic elimination device | |
| CN215067144U (en) | Relay adhesion detection circuit | |
| CN107991587A (en) | A kind of fault arc detection method detected by electric arc pulse signal starting | |
| CN114724798A (en) | Alternating-current zero-crossing magnetic core demagnetization and demagnetization circuit and method | |
| WO2014121644A1 (en) | Method and device for monitoring electrical fault sparks in real time | |
| CN103292679B (en) | Displacement measurement circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140604 Effective date of abandoning: 20180821 |