CN111711168A - Fault arc protection device - Google Patents
Fault arc protection device Download PDFInfo
- Publication number
- CN111711168A CN111711168A CN202010727990.4A CN202010727990A CN111711168A CN 111711168 A CN111711168 A CN 111711168A CN 202010727990 A CN202010727990 A CN 202010727990A CN 111711168 A CN111711168 A CN 111711168A
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- circuit
- protection device
- fault arc
- signal
- fault
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- 238000005070 sampling Methods 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 15
- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000007405 data analysis Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 claims description 29
- 238000004891 communication Methods 0.000 claims description 15
- 230000007246 mechanism Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000010891 electric arc Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/50—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to the appearance of abnormal wave forms, e.g. ac in dc installations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2506—Arrangements for conditioning or analysing measured signals, e.g. for indicating peak values ; Details concerning sampling, digitizing or waveform capturing
- G01R19/2509—Details concerning sampling, digitizing or waveform capturing
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Breakers (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention provides a fault arc protection device, which comprises a control electronic circuit board, wherein the control electronic circuit board comprises: the device comprises a data acquisition amplifying circuit, an arc data analysis circuit, a data analysis program and a data instruction input and output circuit; the signal processing circuit processes the sampling signal to obtain a characteristic analog signal, and the characteristic analog signal is converted into a characteristic digital signal; acquiring the characteristic value signal, and judging whether a fault arc occurs in a load circuit based on the data analysis program; the electrical parameter acquisition sensor is a metal resistance sensor which is directly connected to the output load end of the main line to be measured in series; the metal resistance sensor comprises N series resistors, M parallel resistors and a resistor enabling controller, wherein the resistor enabling controller controls the M parallel resistors to be not communicated at the same moment, so that full-wave-band and full-frequency waveform data on the output load end of the tested main line are collected.
Description
Technical Field
The invention belongs to the technical field of electrical equipment, and particularly relates to a fault arc protection device.
Background
At present, the existing fault arc protection device mainly uses a current transformer as an arc waveform acquisition element, and as the arc waveform data acquired by the current transformer is limited by the current magnitude, the current frequency, the ambient temperature, the volume, the structure and the like, the acquired waveform data cannot contain real-time data of all frequencies and all current magnitudes, so that some fault arc waveform data are inevitably omitted, and some fault arcs cannot be cut off for protection or electrical fire is caused, which is a great technical hidden danger. This indicates that the current transformer is used to collect the fault arc waveform data of the fault arc protection device, and people's life and property cannot be protected reliably.
In addition, similar fault arc protection products in the market at present are independent and isolated products, and have no program upgrading, so that novel arc waveform data generated by a subsequent novel electric appliance cannot be monitored and protected. The potential hidden danger of electrical fire is brought to people, and the life and property safety of people is threatened all the time.
Disclosure of Invention
In order to solve the above technical problem, the present invention provides a fault arc protection device, where the fault arc protection device includes a control electronic circuit board, and the control electronic circuit board includes: the device comprises a data acquisition amplifying circuit, an arc data analysis circuit, a data analysis program and a data instruction input and output circuit; the acquired data amplifying circuit comprises an electrical parameter acquisition sensor, the electrical parameter acquisition sensor is connected with an output load end of a main line to be detected, the electrical parameter acquisition sensor is connected with a signal sampling circuit, and the signal sampling circuit samples signals in the main line to be detected based on the electrical parameter acquisition sensor; the signal sampling circuit is connected with a signal processing circuit, the signal processing circuit processes the sampling signal to obtain a characteristic analog signal, and the analog characteristic signal is input to the microprocessor MCU module; converting the characteristic analog signal into a characteristic digital signal through a digital-to-analog conversion (AD) processing unit of the microprocessor MCU; the arc data analysis circuit acquires the characteristic value signal and judges whether a fault arc occurs in a load circuit based on the data analysis program; and when the fault circuit is judged to occur, the data instruction input-output circuit outputs a corresponding signal instruction.
More specifically, as one contribution of the present invention to the prior art, in the present invention, the electrical parameter acquisition sensor is a metal resistance sensor directly connected in series to the output load terminal of the main line under test;
the metal resistance sensor can be used for collecting full-wave-band full-frequency waveform data on the output load end of the main line to be tested;
as a more specific key technical means for embodying the above-mentioned outstanding contribution, the metal resistance sensor includes N series resistors, M parallel resistors, and a resistance enable controller that controls the M parallel resistors to not be simultaneously connected at the same time.
The resistance enabling controller comprises a time sequence random number generator, the time sequence random number generator generates at least one random number of a positive integer value based on a sampling time sequence stored by the signal sampling circuit, and controls corresponding resistors in the M parallel resistors to be communicated based on the random number of the positive integer value, so that the acquisition of full-wave-band and full-frequency waveform data on the output load end of the tested main line is realized.
On the other hand, the normal working state of the fault arc protection device can be remotely monitored through a remote communication function, so that the safety of life and property of people can be ensured to be protected constantly by the fault arc protection device;
therefore, as a further contribution of the present invention, the fault arc protection device further comprises a testing device and a testing button, so that a user can check whether the function of the fault arc protection device is intact through the testing button;
the test button independently forms a simulated fault arc current and a leakage current, a user only needs to operate the test button regularly, and if a protection reaction normally occurs, the fault arc protection device is in an effective working state; and a test instruction is sent through the wireless data communication module to check whether the function of the fault arc protection device is intact.
In addition, compared with the defect that the prior art cannot monitor and protect the novel arc waveform data generated by the subsequent novel electric appliance without program upgrading, the technical scheme of the invention can also update and upgrade the firmware of the control electronic circuit board and the data analysis program through a wired data communication port.
Further advantages of the invention will be apparent in the detailed description section in conjunction with the drawings attached hereto.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is an overall block diagram of a fault arc protection device in accordance with one embodiment of the present invention;
FIG. 2 is a schematic view of the internal structure of the apparatus of FIG. 1;
FIG. 3 is a schematic diagram of a connection circuit for arc testing using the apparatus of FIG. 1;
fig. 4 is a diagram of further details of the circuit of fig. 3.
The reference numerals in the figures have the following meanings:
1. an operating handle; 2. an operating mechanism; 3. A test button; 4. a main contact; 5. an incoming line wiring terminal; 6. an overload protection device; 7. a short circuit protection device; 8. an arc extinguishing device; 9. an electric shock leakage detection device; 10. a load wiring terminal; 11. on-off state indication; 12. a functional indication; 13. a control electronic circuit board; 14. a data communication port; 15. metal (shunt) sensors; 16. a plastic housing; 17. a plastic housing.
Detailed Description
The invention is further described with reference to the following drawings and detailed description.
As shown in fig. 1 and 2, a fault arc protection device includes: an operating handle 1; an operating mechanism 2; a test button 3; a main contact 4; an incoming wire connecting terminal 5; an overload protection device 6; a short-circuit protection device 7; an arc extinguishing device 8; an electric shock leakage detection device 9; a load terminal 10; on-off status indication 11; a functional indication 12; a control electronic circuit board 13; a data communication port 14; a metal (shunt) sensor 15; a plastic housing 16; a plastic housing 17.
The operating handle 1, the operating mechanism 2, the main contact 4 and the arc extinguishing device 8 form a switching mechanism of a main power line of the device, so that manual switching-on and switching-off can be realized, and the triggering and switching-off function of the mechanism can also be realized.
Referring to fig. 1-2, the arc protection device of the present embodiment includes an external plastic protection member, a control electronic circuit board, an electrical parameter acquisition sensor, a short circuit protection mechanism, a leakage detection and protection device, an overload protection device, an input/output wiring device, a main circuit on/off indication device, a test loop test device, and an operating mechanism trip free device.
The control electronics board includes: the device comprises a collected data amplifying circuit, an electric arc data analyzing circuit, a data analyzing program, a data instruction input and output circuit, a wired data communication port, a wireless data communication module and a working state indicating circuit.
The fault electric arc protection device comprises a short circuit protection device, an overload protection device and an electric shock and electric leakage detection device, wherein the short circuit protection device is used for carrying out short circuit safety protection, the overload protection device is used for carrying out overload safety protection, the control electronic circuit board is used for carrying out safety protection on fault electric arcs, and the electric shock and electric leakage detection device is used for carrying out safety protection on electric leakage and electric shock circuit abnormity.
Furthermore, a short-circuit protection mechanism, a leakage detection and protection device, an overload protection device, an input/output wiring device, a main circuit connection and disconnection indicating device, a test loop testing device, an operating mechanism free tripping device and the like form a mechanical system with the functions of short circuit, overload, electric shock, leakage, wiring, operation and the like.
Furthermore, a collected data amplifying circuit, an arc data analyzing circuit, a data analyzing program, a data instruction input/output circuit, a wired data communication port, a wireless data communication module, a working state indicating circuit and the like are integrated into the control electronic circuit board to form an electronic control system.
Further, the metal (shunt) sensor in the mechanical system, the collected arc waveform signal, is connected to the electronic control system to form an assembly, and the assembly is placed in the plastic protective shell to form the fault arc protection device described in the embodiment.
The fault arc protection device also comprises a testing device and a testing button, so that a user can check whether the function of the fault arc protection device is intact or not through the testing button;
the test button independently forms a simulated fault arc current and a leakage current, a user only needs to operate the test button regularly, and if a protection reaction normally occurs, the fault arc protection device is in an effective working state.
And sending a test instruction through the wireless data communication module to check whether the function of the fault arc protection device is intact.
Referring next to fig. 3, the collected data amplifying circuit includes an electrical parameter collecting sensor, the electrical parameter collecting sensor is connected to an output load end of the main line to be tested, the electrical parameter collecting sensor is connected to a signal sampling circuit, and the signal sampling circuit samples a signal in the main line to be tested based on the electrical parameter collecting sensor;
the signal sampling circuit is connected with a signal processing circuit, the signal processing circuit processes the sampling signal to obtain a characteristic analog signal, and the analog characteristic signal is input to the microprocessor MCU module;
converting the characteristic analog signal into a characteristic digital signal through a digital-to-analog conversion (AD) processing unit of the microprocessor MCU;
the arc data analysis circuit acquires the characteristic value signal and judges whether a fault arc occurs in a load circuit based on the data analysis program;
and when the fault circuit is judged to occur, the data instruction input-output circuit outputs a corresponding signal instruction.
The metal (shunt) sensor 15 samples the signal in the main line under test. And performing special processing on the sampling signal to obtain a characteristic analog signal, and converting the characteristic analog signal into a characteristic digital signal through a digital-to-analog conversion (AD) processing unit of the microprocessor MCU. The digital signal is used for judging whether a fault arc occurs in the load circuit through a complex algorithm between the microprocessor MCU and the arc detection module.
Such algorithms are well known in the art and will not be described in detail herein.
When a fault arc occurs, a corresponding signal is output. The control module provides an LED interface for LED output expression. Button interface, key control, for necessary operational control. GPIO [3:1] is an additional GPIO interface. Meanwhile, the module can provide an I2C interface and interfaces such as a Universal Asynchronous Receiver Transmitter (UART) and the like for communication, and can communicate with an external circuit or upload alarm information to monitoring equipment, so that the occurrence of fault arc fire is effectively prevented.
On the basis of fig. 3, further reference is made to fig. 4. In this embodiment, for the data acquisition mode of the arc, the slave circuit is directly connected in series in the main line to be tested through the metal resistor (shunt) for direct acquisition, instead of the inductive acquisition through the current transformer, so that the defects of the transformer, such as easy current saturation, inconsistent high and low frequency induction, large occupied space volume, easy stress influence and the like, are effectively avoided.
Specifically, the electrical parameter acquisition sensor is a metal resistance sensor directly connected in series to the output load end of the main line to be measured.
The metal resistance sensor comprises N series resistors, M parallel resistors and a resistor enabling controller, wherein the resistor enabling controller controls the corresponding enabling switches, so that the M parallel resistors are not communicated at the same time.
The resistance enabling controller comprises a time sequence random number generator, the time sequence random number generator generates at least one random number of a positive integer value based on a sampling time sequence stored by the signal sampling circuit, and the corresponding resistance in the M parallel resistors is controlled to be connected or disconnected based on the random number of the positive integer value.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A fault arc protection device comprising a control electronics board, characterized in that: the control electronic circuit board includes: the device comprises a data acquisition amplifying circuit, an arc data analysis circuit, a data analysis program and a data instruction input and output circuit;
the acquired data amplifying circuit comprises an electrical parameter acquisition sensor, the electrical parameter acquisition sensor is connected with an output load end of a main line to be detected, the electrical parameter acquisition sensor is connected with a signal sampling circuit, and the signal sampling circuit samples signals in the main line to be detected based on the electrical parameter acquisition sensor;
the signal sampling circuit is connected with a signal processing circuit, the signal processing circuit processes the sampling signal to obtain a characteristic analog signal, and the analog characteristic signal is input to the microprocessor MCU module;
converting the characteristic analog signal into a characteristic digital signal through a digital-to-analog conversion (AD) processing unit of the microprocessor MCU;
the arc data analysis circuit acquires the characteristic value signal and judges whether a fault arc occurs in a load circuit based on the data analysis program;
and when the fault circuit is judged to occur, the data instruction input-output circuit outputs a corresponding signal instruction.
2. A fault arc protection device, as claimed in claim 1, wherein: the fault electric arc protection device comprises a short circuit protection device, an overload protection device and an electric shock and electric leakage detection device, wherein the short circuit protection device is used for carrying out short circuit safety protection, the overload protection device is used for carrying out overload safety protection, the control electronic circuit board is used for carrying out safety protection on fault electric arcs, and the electric shock and electric leakage detection device is used for carrying out safety protection on electric leakage and electric shock circuit abnormity.
3. A fault arc protection device, as claimed in claim 1, wherein: the signal sampling circuit samples signals in a main line to be tested based on the electrical parameter acquisition sensor, and specifically comprises: the electrical parameter acquisition sensor is a metal resistance sensor which is directly connected in series to the output load end of the main line to be measured.
4. A fault arc protection device, as claimed in claim 3, wherein: and acquiring full-wave-band and full-frequency waveform data on the output load end of the main line to be tested by using the metal resistance sensor.
5. A fault arc protection device according to any of claims 1-4, wherein: the fault arc protection device also comprises an external plastic protection piece, an input/output wiring device, a main circuit connection and disconnection indicating device, a test loop testing device and an operating mechanism free tripping device;
the control electronic circuit board further comprises a collected data amplifying circuit, a wired data communication port, a wireless data communication module and a working state indicating circuit.
6. A fault arc protection device, as claimed in claim 5, wherein: and updating and upgrading the firmware of the control electronic circuit board and the data analysis program through the wired data communication port.
7. A fault arc protection device, as claimed in claim 5, wherein: the fault arc protection device also comprises a testing device and a testing button, so that a user can check whether the function of the fault arc protection device is intact or not through the testing button;
the test button independently forms a simulated fault arc current and a leakage current, a user only needs to operate the test button regularly, and if a protection reaction normally occurs, the fault arc protection device is in an effective working state.
8. A fault arc protection device, as claimed in claim 5, wherein: and sending a test instruction through the wireless data communication module to check whether the function of the fault arc protection device is intact.
9. A fault arc protection device, as claimed in claim 4, wherein: the metal resistance sensor comprises N series resistors, M parallel resistors and a resistor enabling controller, wherein the resistor enabling controller controls the M parallel resistors to be communicated at the same moment at different times.
10. A fault arc protection device, as claimed in claim 9, wherein: the resistance enabling controller comprises a time sequence random number generator, the time sequence random number generator generates at least one random number of a positive integer value based on a sampling time sequence stored by the signal sampling circuit, and the corresponding resistance in the M parallel resistors is controlled to be communicated based on the random number of the positive integer value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010727990.4A CN111711168B (en) | 2020-07-27 | 2020-07-27 | Fault arc protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010727990.4A CN111711168B (en) | 2020-07-27 | 2020-07-27 | Fault arc protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111711168A true CN111711168A (en) | 2020-09-25 |
| CN111711168B CN111711168B (en) | 2024-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010727990.4A Active CN111711168B (en) | 2020-07-27 | 2020-07-27 | Fault arc protection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN212627137U (en) * | 2020-07-27 | 2021-02-26 | 杭州欧德朗智能科技有限公司 | Fault arc protection device |
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| Publication number | Publication date |
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| CN111711168B (en) | 2024-07-23 |
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