CN112198401A - Intelligent fault arc detector - Google Patents
Intelligent fault arc detector Download PDFInfo
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- CN112198401A CN112198401A CN202011070734.9A CN202011070734A CN112198401A CN 112198401 A CN112198401 A CN 112198401A CN 202011070734 A CN202011070734 A CN 202011070734A CN 112198401 A CN112198401 A CN 112198401A
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- 238000012360 testing method Methods 0.000 claims description 11
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- 238000010891 electric arc Methods 0.000 abstract description 6
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- 230000005540 biological transmission Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 238000012806 monitoring device Methods 0.000 description 3
- 230000008054 signal transmission Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
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- 241001391944 Commicarpus scandens Species 0.000 description 1
- 206010043268 Tension Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000036626 alertness Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1218—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using optical methods; using charged particle, e.g. electron, beams or X-rays
Abstract
The invention discloses an intelligent fault arc detector, relates to the technical field of arc detectors, and aims to solve the problem that fault arcs in circuits in the prior art are difficult to detect under common conditions. The utility model discloses a high-frequency electric arc fault detection device, including casing, current signal amplifier, high-frequency wavelet detector, electric arc fault identification detector, current signal amplifier and high-frequency wavelet detector electric connection, high-frequency wavelet detector and electric arc fault identification detector electric connection, electric arc fault identification detector and tripping information output ware electric connection.
Description
Technical Field
The invention relates to the technical field of arc detectors, in particular to an intelligent fault arc detector.
Background
The arc is a gas discharge phenomenon, and the transient spark generated by current passing through some insulating medium (such as air) is characterized by very high temperature, very low current, short duration, and frequent occurrence once a breakdown point occurs, and during the arc discharge, a large amount of heat is generated, which can ignite surrounding flammable and explosive substances to cause fire or even explosion, the most important hazard of the fault arc is to initiate fire, when the fault arc occurs, the central temperature reaches 3000-4000 ℃, and the metal melt is splashed out, the high temperature and high heat generated by the fault arc easily ignite the circuit insulating layer to cause the circuit to ignite, and if combustible substances exist near the fault point, the combustible substances are also easily ignited to cause the fire.
When a fault arc occurs, the current change in a line is very small, the breaker and the arc-extinguishing type short-circuit protector cannot detect the fault arc, and the fault arc can only be detected by a fault arc detector at present; therefore, the market is urgently in need of developing an intelligent fault arc detector to help people to solve the existing problems.
Disclosure of Invention
The present invention aims to provide an intelligent fault arc detector to solve the problem of the above background art that the fault arc is generally difficult to detect.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an intelligence trouble arc detector, includes casing and auxiliary tank, the internally mounted of casing has current signal amplifier, current signal amplifier's top is provided with high frequency wavelet detector, high frequency wavelet detector's top is provided with arc fault identification detector, arc fault identification detector's top is provided with the dropout information follower, current signal amplifier and high frequency wavelet detector electric connection, high frequency wavelet detector and arc fault identification detector electric connection, arc fault identification detector and dropout information follower electric connection.
Preferably, a display screen is arranged above the front end face of the auxiliary box and electrically connected with the arc fault recognition detector.
Preferably, a yellow fault alarm lamp is arranged above the front end face of the auxiliary box and electrically connected with the arc fault recognition detector.
Preferably, one side of the shell is provided with a buzzer, and the buzzer is electrically connected with the arc fault identification detector.
Preferably, the front end face of the shell is provided with an NI zero line input and an LI live line input respectively, and the NI zero line input and the LI live line input are both electrically connected with the current signal amplifier.
Preferably, the front end face of the shell is respectively provided with an NO zero line output and an LO live line output, and the NO zero line output and the LO live line output are both electrically connected with the tripping information output device.
Preferably, a first NC spare port, a second NC spare port, a third NC spare port and a communication port are respectively arranged on the front end surface of the housing, and the first NC spare port, the second NC spare port, the third NC spare port and the communication port are respectively electrically connected with the current signal amplifier and the trip information output device.
Preferably, be provided with test button on the preceding terminal surface of auxiliary tank, test button and arc fault recognition detector electric connection, be provided with base and radiating groove on the rear end face of casing respectively, and base and radiating groove all set up structure as an organic whole with the casing.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, through the arrangement of the arc fault identification detector, the arc fault identification detector detects the fault arc in the time domains higher than and lower than the threshold value based on the difference of the attenuation time of the high and low pulses reflecting the current mutation, and the arc fault identification detector is provided with the microprocessor, so that the working effect of the arc is monitored in real time and intelligently detected, the detection of the fault arc is realized, and the occurrence of fire is avoided.
2. According to the invention, through the arrangement of the high-frequency wavelet detector, the high-frequency wavelet detector can reflect the sudden change generated by the signal of the current and detect the size of the sudden change by judging whether the periodically generated high-frequency current is different from the normal switching arc and detecting whether the frequency spectrum range is different from the common high-frequency harmonic generated by the application of power electronic devices and the like. Through research and analysis of the information, the judgment of the arc accuracy can be further increased, and the situation of misjudgment is prevented.
3. According to the invention, through the arrangement of the current signal amplifier, ultraviolet light in the received arc light is converted into visible light, the visible light is converted into a trigger signal by the photoelectric converter, the load current is detected, the current signal is amplified and transmitted to the high-frequency wavelet detector, and whether the frequency of the current signal is greater than the power supply frequency and less than the power line communication frequency or not is judged, so that the judgment accuracy is improved.
4. According to the invention, through the arrangement of the tripping information output device, the buzzer and the yellow fault alarm lamp, when the fault arc causing fire disaster in a circuit is detected, the yellow fault alarm lamp and the buzzer send out sound and light alarm, the tripping information output device simultaneously sends an alarm signal to the monitoring equipment, and transmits the position information of a fault point to the monitoring equipment, so as to locate the fault area, the equipment can send out alarm sound by the buzzer on site, light the yellow fault lamp, output tripping information to the shunt release, and transmit the alarm information to the monitoring equipment at the upper end, so that the purpose of early warning the occurrence of fire disaster is realized.
Drawings
FIG. 1 is a schematic overall view of an intelligent fault arc detector of the present invention;
FIG. 2 is a side view of an intelligent fault arc detector of the present invention;
FIG. 3 is a schematic view of the internal structure of the housing of the present invention;
FIG. 4 is a schematic diagram of an arc detection circuit of the present invention;
FIG. 5 is a rear view of an intelligent fault arc detector of the present invention.
In the figure: 1. a housing; 2. a sub-tank; 3. a display screen; 4. a yellow fault warning lamp; 5. a test button; 6. inputting an NI zero line; 7. an LI live wire input; 8. NO zero line output; 9. LO live wire output; 10. a first NC standby port; 11. a second NC backup port; 12. a third NC standby port; 13. a communication port; 14. a buzzer; 15. a base; 16. a current signal amplifier; 17. a high-frequency wavelet detector; 18. an arc fault identification detector; 19. a trip information output unit; 20. a heat dissipation groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-5, an embodiment of the present invention is shown: the utility model provides an intelligence trouble arc detector, including casing 1 and auxiliary tank 2, the internally mounted of casing 1 has current signal amplifier 16, the top of current signal amplifier 16 is provided with high frequency wavelet detector 17, the top of high frequency wavelet detector 17 is provided with arc fault discernment detector 18, the top of arc fault discernment detector 18 is provided with trip information follower 19, current signal amplifier 16 and high frequency wavelet detector 17 electric connection, high frequency wavelet detector 17 and arc fault discernment detector 18 electric connection, arc fault discernment detector 18 and trip information follower 19 electric connection.
Further, the preceding terminal surface top of auxiliary tank 2 is provided with display screen 3, display screen 3 and 18 electric connection of arc fault recognition detector, the data that produce when display screen 3 can show 18 detection circuitry of arc fault recognition detector in real time, thereby supply the staff to observe and the record, thereby accomplish man-machine sharing, intelligent and artificial integrative fault arc detection mode of handling, improve fault arc's the detection rate of accuracy, also made things convenient for the staff to detect and observe the electric arc condition in the circuit simultaneously, casing 1 also sets up to a body structure with auxiliary tank 2 simultaneously, improve the leakproofness, and casing 1 adopts the hard resin material, high temperature resistant, and non-conductive, unusual height in the safety in utilization, be convenient for the transport, transportation and storage, make this intelligent fault arc detector use more convenient.
Further, a yellow fault alarm lamp 4 is arranged above the front end face of the auxiliary box 2, the yellow fault alarm lamp 4 is electrically connected with an arc fault recognition detector 18, and the yellow fault alarm lamp 4 is adopted, so that when a fault arc occurs, nervous tension of workers is triggered through yellow light, so that any person can immediately raise alertness when seeing that the fault lamp lights up, and rapidly alarm or close a circuit to guide people to rapidly avoid fire or rapidly escape from a fire scene, thereby minimizing injury to the personnel, the yellow fault alarm lamp 4 is directly electrically connected with the arc fault recognition detector 18, the arc fault recognition detector 18 directly controls the yellow fault alarm lamp 4, the efficiency of signal transmission is improved, excessive transmission circuits are avoided between the two, and the phenomenon that a signal cannot be sent out due to the fault of a middle transmission circuit is avoided, thereby improving the reliability of the intelligent fault arc detector.
Further, a buzzer 14 is arranged on one side of the shell 1, the buzzer 14 is electrically connected with the arc fault identification detector 18, the sound emitted by the buzzer 14 is sharp and has strong penetrating power, when no working personnel is arranged beside the fault arc detector, but the fault arc is detected in the circuit, the working personnel can not receive the early warning information through the yellow fault alarm lamp 4, the sharp sound emitted by the buzzer 14 can penetrate through the wall body and transmit the early warning information in the form of sound, so that the situation that the working personnel can not receive the early warning signal, and further the safety of the working personnel is ensured, the buzzer 14 is also directly and electrically connected with the arc fault identification detector 18, the buzzer 14 is directly controlled by the arc fault identification detector 18, the efficiency of signal transmission is improved, too many transmission circuits are avoided between the two, and the phenomenon that the signal can not be emitted due to the fault of the middle transmission circuit is avoided, thereby further improving the reliability of the intelligent fault arc detector.
Further, be provided with NI zero line input 6 and LI live wire input 7 on the preceding terminal surface of casing 1 respectively, NI zero line input 6 and LI live wire input 7 all with current signal amplifier 16 electric connection, NI zero line input 6 and LI live wire input 7 are the input, with the input terminal of circuit two even, through LI live wire input 7 lug connection circuit, through 6 grounds of NI zero line input, thereby satisfy the characteristic of most circuits, make this intelligent fault arc detector can directly establish ties with most circuits, thereby improve the accuracy of detecting time, make this intelligent fault arc detector reliability higher.
Further, be provided with NO zero line output 8 and LO live wire output 9 on the preceding terminal surface of casing 1 respectively, NO zero line output 8 and LO live wire output 9 all with the 19 electric connection of dropout information follower, NO zero line output 8 and LO live wire output 9 are the output, link to each other with the circuit equally, thereby form a closed circuit, make partly electric current in the circuit need pass through this intelligent fault arc detector, thereby form series circuit, the setting through zero line and live wire equally, make this intelligent fault arc detector be applicable to most circuit, the purpose is the same with the zero line and the live wire of input, all be for the accuracy of circuit arc detection time measuring, thereby make this intelligent fault arc detector's use reliability higher, it is safer during the use.
Further, a first NC spare port 10, a second NC spare port 11, a third NC spare port 12 and a communication port 13 are respectively arranged on the front end surface of the housing 1, the first NC spare port 10, the second NC spare port 11, the third NC spare port 12 and the communication port 13 are respectively electrically connected with the current signal amplifier 16 and the trip information output device 19, the first NC spare port 10, the second NC spare port 11, the third NC spare port 12 and the communication port 13 have the same function and are used for signal transmission at different positions, such as sending an alarm signal to a monitoring device and communicating to a monitoring device or a cloud platform of a fire control room, so as to realize remote monitoring, so as to transmit position information of a fault point to the monitoring device, locate a fault area, thereby facilitating detection of a worker, avoiding occurrence of an electrical fire, and efficiently handling fault arcs, the circuit is safer in the using process, the occurrence rate of electrical fire is effectively reduced, the personal and property safety of people is guaranteed, and the electrical of the intelligent management circuit is realized.
Furthermore, a testing button 5 is arranged on the front end face of the auxiliary box 2, the testing button 5 is electrically connected with an arc fault recognition detector 18, a base 15 and a heat dissipation groove 20 are respectively arranged on the rear end face of the shell 1, the base 15 and the heat dissipation groove 20 are both arranged into an integral structure with the shell 1, heat emitted by each working component in the shell 1 during working can be volatilized through the arrangement of the heat dissipation groove 20, meanwhile, a certain space is formed between the heat dissipation groove 20 and a fixed face through the arrangement of the base 15, so that the heat dissipation groove 20 is prevented from being blocked, the testing button 5 can be used for testing when the fault arc detector is preassembled, so that the device is debugged, the self fault does not exist, the use safety of the device is improved, the defective products are prevented from being installed on a circuit, and the intelligent fault arc detector can be detected through the testing button 5 in the later use process, and the normal work of the intelligent fault arc detector is ensured.
The working principle is as follows: when the device is used, the current waveform is distorted and the fault arc current is sometimes absent when a grounding fault arc occurs, so that a residual current type detector cannot accurately and reliably detect the fault, the main hazard of the fault arc is fire, when the fault arc occurs, the central temperature of the fault arc is up to 3000-4000 ℃, metal melt is splashed, and an arc fault identification detector 18 is adopted: based on the difference of the attenuation time of the high and low pulses reflecting the current mutation through time delay, a high-frequency wavelet detector 17 is adopted in the time domains higher than and lower than a threshold value: by determining whether the periodically generated high frequency current is different from a normal switching arc and detecting whether the spectral range is different from a common high frequency harmonic generated due to applications such as power electronics, a current signal amplifier 16 is employed: converting the ultraviolet light in the received arc light into visible light, and converting the visible light into a trigger signal by a photoelectric converter, typically: detecting load current, amplifying and transmitting a current signal to an arc characteristic screener, judging whether the frequency of the current signal is greater than power supply frequency and less than power line communication frequency, identifying arc faults by judging whether a current waveform derivative and an accumulated arc period both exceed a set threshold value according to arc waveform characteristics, wherein the intelligent fault arc detector comprises an operating mechanism, a contact system, a tripping information outputter 19, a test button 5, an NI zero line input 6, an LI live line input 7, an NO zero line output 8, an LO live line output 9, a first NC spare port 10, a second NC spare port 11, a third NC spare port 12, a communication port 13, a shell 1 and other general structures, and is characterized by comprising an arc fault identification detector 18 and a high-frequency wavelet detector 17, and based on PCB hardware and a preset protection algorithm, realizing intelligent arc detection and fault arc identification, protection characteristic matching analysis is carried out, a non-zero-crossing discrete wavelet coefficient is calculated, whether a threshold value is met or not is determined together with a low-frequency current zero-crossing signal, the series fault arc electrical connection point is a weak link or a link which is easy to break down in the aspects of electrical communication, mechanical strength and protection measures, electric arcs or heating can be directly caused, and further an electrical fire disaster is caused, and after the intelligent fault arc detector is arranged, the electrical fire disaster can be greatly prevented.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. An intelligent fault arc detector, includes casing (1) and auxiliary tank (2), its characterized in that: the utility model discloses a novel high-frequency electric shock detector, including casing (1), internally mounted has current signal amplifier (16), the top of current signal amplifier (16) is provided with high frequency wavelet detector (17), the top of high frequency wavelet detector (17) is provided with arc fault discernment detector (18), the top of arc fault discernment detector (18) is provided with trip information follower (19), current signal amplifier (16) and high frequency wavelet detector (17) electric connection, high frequency wavelet detector (17) and arc fault discernment detector (18) electric connection, arc fault discernment detector (18) and trip information follower (19) electric connection.
2. An intelligent fault arc detector as claimed in claim 1, wherein: the front end face top of auxiliary box (2) is provided with display screen (3), display screen (3) and arc fault discernment detector (18) electric connection.
3. An intelligent fault arc detector as claimed in claim 1, wherein: a yellow fault alarm lamp (4) is arranged above the front end face of the auxiliary box (2), and the yellow fault alarm lamp (4) is electrically connected with the arc fault recognition detector (18).
4. An intelligent fault arc detector as claimed in claim 1, wherein: a buzzer (14) is arranged on one side of the shell (1), and the buzzer (14) is electrically connected with the arc fault identification detector (18).
5. An intelligent fault arc detector as claimed in claim 1, wherein: the high-voltage power supply is characterized in that an NI zero line input (6) and an LI live line input (7) are respectively arranged on the front end face of the shell (1), and the NI zero line input (6) and the LI live line input (7) are electrically connected with the current signal amplifier (16).
6. An intelligent fault arc detector as claimed in claim 1, wherein: the novel tripping device is characterized in that the front end face of the shell (1) is respectively provided with an NO zero line output (8) and an LO live line output (9), and the NO zero line output (8) and the LO live line output (9) are electrically connected with a tripping information output device (19).
7. An intelligent fault arc detector as claimed in claim 1, wherein: the circuit breaker is characterized in that a first NC (numerical control) standby port (10), a second NC standby port (11), a third NC standby port (12) and a communication port (13) are respectively arranged on the front end face of the shell (1), and the first NC standby port (10), the second NC standby port (11), the third NC standby port (12) and the communication port (13) are respectively electrically connected with a current signal amplifier (16) and a trip information output device (19).
8. An intelligent fault arc detector as claimed in claim 1, wherein: be provided with test button (5) on the preceding terminal surface of auxiliary tank (2), test button (5) and arc fault discernment detector (18) electric connection, be provided with base (15) and radiating groove (20) on the rear end face of casing (1) respectively, and base (15) and radiating groove (20) all set up structure as an organic whole with casing (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011070734.9A CN112198401A (en) | 2020-10-09 | 2020-10-09 | Intelligent fault arc detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011070734.9A CN112198401A (en) | 2020-10-09 | 2020-10-09 | Intelligent fault arc detector |
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| Publication Number | Publication Date |
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| CN112198401A true CN112198401A (en) | 2021-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011070734.9A Pending CN112198401A (en) | 2020-10-09 | 2020-10-09 | Intelligent fault arc detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113125905A (en) * | 2021-05-18 | 2021-07-16 | 余昉 | Arc fault detection apparatus, method, device, and storage medium |
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2020
- 2020-10-09 CN CN202011070734.9A patent/CN112198401A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113125905A (en) * | 2021-05-18 | 2021-07-16 | 余昉 | Arc fault detection apparatus, method, device, and storage medium |
| CN113125905B (en) * | 2021-05-18 | 2022-10-21 | 余昉 | Arc fault detection device, method, apparatus and storage medium |
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Application publication date: 20210108 |