CN108879588A - A kind of new pattern creepage and arc fault comprehensive protector - Google Patents
A kind of new pattern creepage and arc fault comprehensive protector Download PDFInfo
- Publication number
- CN108879588A CN108879588A CN201811009825.4A CN201811009825A CN108879588A CN 108879588 A CN108879588 A CN 108879588A CN 201811009825 A CN201811009825 A CN 201811009825A CN 108879588 A CN108879588 A CN 108879588A
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- arc
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- electric arc
- acquisition module
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- 230000001012 protector Effects 0.000 title claims abstract description 9
- 238000010891 electric arc Methods 0.000 claims abstract description 39
- 230000005611 electricity Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 3
- 238000013500 data storage Methods 0.000 claims 1
- 230000001681 protective effect Effects 0.000 description 9
- 239000004020 conductor Substances 0.000 description 7
- 238000009413 insulation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- H02H3/08—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 excess current
- H02H3/10—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 excess current additionally responsive to some other abnormal electrical conditions
-
- 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
- H02H3/26—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/28—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus
-
- 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
- H02H3/26—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention relates to a kind of new pattern creepages and arc fault comprehensive protector, including current transformer, residual current transformer, buckle releaser, power supply, EAMCU processing and control module, fault electric arc data memory module, residual current acquisition module, current acquisition module and voltage acquisition module, the buckle releaser is connected with switch, and buckle releaser is additionally attached in EAMCU processing and control module, fault electric arc data memory module, residual current acquisition module, current acquisition module, voltage acquisition module is connect with EAMCU processing and control module, above-mentioned modules are by power supply power supply, the fault electric arc data memory module is used to store the feature of fault electric arc；The current transformer, residual current transformer are all disposed in loaded line.The present invention is the novel electrical fire-proof product of one kind for effectively identifying arc fault at present and implementing to be protected from electrical fire generation to distribution line.
Description
Technical field
The present invention relates to a kind of new pattern creepages and arc fault comprehensive protector.
Background technique
In recent years, statistical data shows that the fire caused by electrical cause ranks first in all kinds of fire, and there are about 30%
Fire is persistently to be risen as caused by residential electricity aging circuit or unreasonable allocation, and just with every year on average 1% speed,
70% is as caused by electrical fault electric arc in electrical fire.Electrical fire accident frequently occurs, and easily causes destructive
Disaster.We increase on the basis of traditional miniature circuit breaker shields to fault electric arc, to take precautions against electric arc initiation
Fire.
Electric arc is the free gas of high temperature, high conductivity, and electric current passes through moment spark caused by gas medium.Work as electrode
When off contact circuit, as long as electric current reaches 80 ∽ 100mA, voltage reaches 10 ∽ 20V, electric arc will be generated between two electrodes.Electricity
Arc energy with higher, electric arc arc column have the temperature of 6000K or more, and any material contacts for a long time therewith all may gas
Change.
Electric arc in low pressure power and distribution supply cable can be divided into two kinds.One is " good arc ", i.e., produced during normal electric operation
Raw electric arc, such as the swapping process of the normal switch operation of electrical equipment, plug of electrical appliance, fluorescent lamp, arc welding etc.；Line
Road/load current-voltage waveform, it is similar with the certain characteristics of the Current Voltage of electric arc, if Current Voltage distorts, certain equipment
Starting；Good arc allows its presence.Another kind is " bad arc ", i.e. arc fault, by what is generated during electrical equipment abnormal operation
Electric arc or low pressure power and distribution supply cable break down in the case of electric arc, as electrical equipment contact slap, line insulation aging, absolutely
Edge level declines and punctures.Fault electric arc generally results from two kinds of situations：First is that along insulator portion conductive surface；It is another
It is generated from two very close electrodes.The former causes to insulate since insulator is heated for a long time or contingency electric spark occurs
Surface carbonation and form arc channel；The latter runs into ground conduit or a branch of conductor part by sharp gold due to electric conductor
Belong to body to hurt insulation.In low-voltage distributing line, arc fault is divided into serial arc, parallel arc and three kinds of electric arc over the ground；
Series arc faults generally result from a conductor, such as have a generation mechanical breaking in a branch of conductor, or in conductor tab
Place is unclamped, or has at plug a pole disconnect, and the electric current of series fault is limited by loading, thus electric current be likely less than it is negative
Carry electric current；Parallel arc fault is line-to-line fault, is a kind of short circuit, such as two conductor insulation surface machines in a branch of conductor
Tool is damaged and is collided, and this arc current is decided by the size of line impedance；Line fault to ground betides the feelings of earth-return circuit
Condition.It is on fire that bad arc may lead route, or affects the normal operation of the equipment, and should alarm or disconnect immediately main circuit.Electric arc
Can this differentiating method be divided for its angle that jeopardize Electrical Safety, is not reacted in any physical parameter,
Therefore judging whether it is arc fault, there are larger difficulties, while also proposing higher requirement to protection device for arc faults.
Summary of the invention
In order to solve the above technical problems, it is simple, stable novel that the object of the present invention is to provide a kind of structures
Electric leakage and arc fault comprehensive protector.
To achieve the goals above, present invention employs technical solutions below：
A kind of new pattern creepage and arc fault comprehensive protector, including current transformer, residual current transformer, buckle releaser,
Power supply, EAMCU processing and control module, fault electric arc data memory module, residual current acquisition module, current acquisition module and electricity
Acquisition module is pressed, the buckle releaser is connected with switch, and buckle releaser is additionally attached in EAMCU processing and control module, fault electric arc
Data memory module, residual current acquisition module, current acquisition module, voltage acquisition module with EAMCU processing and control module
Connection, above-mentioned modules are used to store the feature of fault electric arc by power supply power supply, the fault electric arc data memory module；
The current transformer, residual current transformer are all disposed in loaded line.
Preferably：The EAMCU processing and control module is also connected with arc fault alarm lamp and communication module.
The present invention is installed on the electric power incoming line terminal of low-voltage distributing line.When by the load end appearance event of protection distribution line
When hindering electric arc, device needs that dump is avoided the generation of appliance fire in a short time.Its control circuit is using integrated electricity
Road and MCU realize that main task is to identify fault electric arc pulse, and issue action signal to tripping mechanism；Again by event
Barrier electric arc is distinguished with " good arc ", it is ensured that system does not generate malfunction.Protection device for arc faults is that effectively identification is electric at present
Arc failure simultaneously implements the novel electrical fire-proof product of one kind for being protected from electrical fire generation to distribution line.
Detailed description of the invention
Fig. 1 is the principle of the present invention block diagram.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
As shown in Figure 1 a kind of new pattern creepage and arc fault comprehensive protector, including current transformer 2, remaining electricity
Current transformer 1, buckle releaser 3, power supply, EAMCU processing and control module, fault electric arc data memory module, residual current acquire mould
Block, current acquisition module and voltage acquisition module, the buckle releaser 3 is connected with switch, and buckle releaser 3 is additionally attached at EAMCU
It manages in control module, fault electric arc data memory module, residual current acquisition module, current acquisition module, voltage acquisition module
It is connect with EAMCU processing and control module, above-mentioned modules are used by power supply power supply, the fault electric arc data memory module
To store the feature of fault electric arc；The current transformer 2, residual current transformer 1 are all disposed in loaded line.It is described
EAMCU processing and control module is also connected with arc fault alarm lamp and communication module.
Then the present invention is carried out by the size of current transformer induced AC current and the A/D sampling of voltage with amplifier
Processing, by treated, signal input microcontroller unit carries out analog-to-digital conversion process, and microcontroller is divided sample magnitude
Analysis.Detect the generation of electric arc in a short time, this detection include to the detection of normal arc caused by load operation and
It is supported on arc-detection caused by abnormal condition, if meeting the characteristic of fault electric arc, controller will issue protective device
Trip signal, protective device separating brake disconnects, and lights arc fault alarm lamp.
The present invention analyzes the load arc characteristic of thumping majority by a large amount of practical basis and database, including
Load arc characteristic as much as possible, and store it in EAMCU.
It is operated normally since a large amount of nonlinear electricals load, contains the feature of many fault electric arcs in current waveform, therefore
Fault electric arc is identified in numerous nonlinear loads with higher accuracy, is that protection device for arc faults faces
One problem.This is needed by studying a large amount of fault electric arc waveforms, while being also required to grasp a large amount of nonlinear loads
Current characteristic finds existing some general character and personal characteristics between each other, in this, as the important evidence for determining arc fault.
Therefore need to store a large amount of fault electric arc characteristic and a large amount of electrical loads in the EAMCU of protection device for arc faults
The current profile data of normal operation, or automatic measure on line function is integrated into arc protection device, to take certainly
Mode of learning makes protection device for arc faults under operation to the fault electric arc generated in route and novel electrical load electricity
It flows feature and carries out real-time update and memory.
The movement of protection device for arc faults differentiates such as Tables 1 and 2 under large and small arc current：
Table 1, the protection device for arc faults break at 63A and small arc current below
| Arc current（Virtual value） | 3A | 6A | 13A | 20A | 40A | 63A |
| Maximum break | 1s | 0.5s | 0.25s | 0.15s | 0.12s | 0.12s |
Note：Small arc current may be generated by relatively insulation fault or serial arc.
Table 2, protection device for arc faults maximum half wave number in 0.5s under the big arc current of 63A or more
| Arc current（Virtual value） | 75A | 100A | 150A | 200A | 300A | 500A |
| Half wave number | 12 | 10 | 8 | 8 | 8 | 8 |
Note：Big arc current may be generated by relatively insulation fault or parallel arc.
Input current signal of the invention uses miniature high-accuracy current transformer, high temperature resistant（-25℃∽75℃）, corrosion resistant
Erosion, epoxy resin encapsulated, isolation performance is good, and impact resistance is strong, and precision is high, and the range of linearity is wide, the linearity 0.1%.Pass through signal tune
Voltage signal after whole circuit converts mutual inductor is filtered, amplifies, adjusts and exports.
Protective device earth leakage protective of the invention is to detect electric leakage signal in route by residual current transformer, sampling
The signal voltage arrived differentiates through electric sub-member plate to be amplified, and when the residual current in route reaches specified action value, drives tripping
Device is protected to drive lock release tripping that protective device tripping is made to cut off the power.
The overcurrent protection of protective device of the invention is by double golden components as temperature increases orientation rule bending
Principle, normal current（1.13 In again）Bending angle is little, therefore thrust is insufficient to allow lock release tripping 15, overloads when reaching
Electric current（1.45 In again）Bending angle is big, and thrust is enough to make lock release tripping that protective device tripping is made to cut off the power to be protected
Shield.
The short-circuit protection of protective device of the invention is realized by instantaneous release, according to F=IN（Suction and electric current
It is directly proportional to coil turn）Analysis, since instantaneous release coil turn is few（Generally only below 10 circles）Although instantaneous trip
In circuit, when circuit works normally, since the number of turns is few, the suction that running current generates is not enough to overcome device coil tandem
The reaction force of spring, therefore route can work normally, but for short circuit current, due to the electric current and normal work of generation
Electric current compared to several times of difference so that tens times or bigger, when short circuit current occurs in route, pass through the suction of instantaneous release
Pushing dynamic iron core impact lock release tripping makes protective device fast trip cut off the power to be protected.
It should be pointed out that above embodiments are only representative examples of the invention.The present invention can also there are many deformations.It is all
Any simple modification, equivalent change and modification to the above embodiments of essence according to the present invention are considered as belonging to this
The protection scope of invention.
Claims (2)
1. a kind of new pattern creepage and arc fault comprehensive protector, it is characterised in that：Including current transformer（2）, remaining electricity
Current transformer（1）, buckle releaser（3）, power supply, EAMCU processing and control module, fault electric arc data memory module, residual current adopt
Collect module, current acquisition module and voltage acquisition module, the buckle releaser（3）It is connected with switch, and buckle releaser（3）It is additionally attached to
In EAMCU processing and control module, fault electric arc data memory module, residual current acquisition module, current acquisition module, voltage are adopted
Collection module is connect with EAMCU processing and control module, and above-mentioned modules are by power supply power supply, the fault electric arc data storage
Module is used to store the feature of fault electric arc；The current transformer（2）, residual current transformer（1）It is all disposed within load line
Lu Zhong.
2. a kind of new pattern creepage according to claim 1 and arc fault comprehensive protector, it is characterised in that：It is described
EAMCU processing and control module is also connected with arc fault alarm lamp and communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811009825.4A CN108879588A (en) | 2018-08-31 | 2018-08-31 | A kind of new pattern creepage and arc fault comprehensive protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811009825.4A CN108879588A (en) | 2018-08-31 | 2018-08-31 | A kind of new pattern creepage and arc fault comprehensive protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108879588A true CN108879588A (en) | 2018-11-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811009825.4A Pending CN108879588A (en) | 2018-08-31 | 2018-08-31 | A kind of new pattern creepage and arc fault comprehensive protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108879588A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111208398A (en) * | 2020-02-25 | 2020-05-29 | 浙江正泰仪器仪表有限责任公司 | Device for simulating temperature, electric leakage and fault electric arc and electric arc generating method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202019191U (en) * | 2011-05-13 | 2011-10-26 | 黄武杰 | Electric arc fault circuit breaker |
| CN102611069A (en) * | 2012-04-18 | 2012-07-25 | 天津市鸿远电气设备有限公司 | Electric arc fault protector |
| CN203800577U (en) * | 2013-11-26 | 2014-08-27 | 中山大学 | Fireproof leakage protection device |
| CN106771898A (en) * | 2016-11-27 | 2017-05-31 | 福州大学 | Series fault arc detection device and its method based on Higher Order Cumulants identification |
| CN107370123A (en) * | 2016-05-13 | 2017-11-21 | 上海电科电器科技有限公司 | Arc fault detection device |
-
2018
- 2018-08-31 CN CN201811009825.4A patent/CN108879588A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202019191U (en) * | 2011-05-13 | 2011-10-26 | 黄武杰 | Electric arc fault circuit breaker |
| CN102611069A (en) * | 2012-04-18 | 2012-07-25 | 天津市鸿远电气设备有限公司 | Electric arc fault protector |
| CN203800577U (en) * | 2013-11-26 | 2014-08-27 | 中山大学 | Fireproof leakage protection device |
| CN107370123A (en) * | 2016-05-13 | 2017-11-21 | 上海电科电器科技有限公司 | Arc fault detection device |
| CN106771898A (en) * | 2016-11-27 | 2017-05-31 | 福州大学 | Series fault arc detection device and its method based on Higher Order Cumulants identification |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111208398A (en) * | 2020-02-25 | 2020-05-29 | 浙江正泰仪器仪表有限责任公司 | Device for simulating temperature, electric leakage and fault electric arc and electric arc generating method thereof |
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Application publication date: 20181123 |