CN104049187B - A kind of alternate high impedance electrical discharge arc and fire risk experimental provision - Google Patents
A kind of alternate high impedance electrical discharge arc and fire risk experimental provision Download PDFInfo
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- CN104049187B CN104049187B CN201410271364.3A CN201410271364A CN104049187B CN 104049187 B CN104049187 B CN 104049187B CN 201410271364 A CN201410271364 A CN 201410271364A CN 104049187 B CN104049187 B CN 104049187B
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Abstract
Occur and fire hazard system safety testing device the invention discloses a kind of alternate high impedance electrical discharge arc; the device includes a wooden case and two two phase conductors for having one side to be open; two wire is arranged in wooden case; two wire is not contacted; distance is maintained between 5~50mm; with water or acid, alkali, the strip cotton fiber of salting liquid or the connection of other quality fiber contacts has been infiltrated on two wires, two wires of the device pass through switch and breaker protector is accessed in line.Ignited the simulation electrical fire experiment such as flammable solid, liquids and gases invention emulates the generation of alternate high impedance electrical discharge arc and electrical discharge arc, prevention and cause of fire for alternate high impedance electrical discharge arc class electrical fire are investigated and collected evidence, the expansion of the technical field of material evidence identification provides theories integration and science and technology evidence.
Description
Technical field
Occur and fire the invention belongs to electric and technical field of fire control, more particularly to a kind of alternate high impedance electrical discharge arc
Dangerous system safety testing device.
Background technology
According to the insulating barrier aging caused by humidity, burn into aging etc. are acted on of circuit phase insulation electric wire, insulaion resistance declines
To a certain extent, or insulating barrier breakage exposes conductor, appearance is alternate because fiber or dust make moist, or phase insulation burn into
The phenomenon of aging discontinuity conducting electric discharge.When alternate high impedance electrical discharge arc generation occurs in circuit, discontinuity electric arc is produced
High arc temperature effect is produced, high temperature action can carbonize insulating barrier, and charring layer further increases alternate high impedance Electrical Discharge Machine meeting, shape
Into vicious circle.Alternate high impedance electrical discharge arc leaves the feature hint of high arc temperature effect as use, but hardly in electric arc
Make use formation melting trace.If high arc temperature triggers concrete on fire, after experience high temperature of fire effect, the spy of high arc temperature effect
Levying vestige will be covered by fire effect, and this kind of vestige can not be found substantially.Only may on superfine small multicore cable
Appearance is small to dissolve vestige or the trace that fuses individually, visually observes and is possible to that this electric heating melting trace can not be found.This means that certain
A little electrical fires are triggered because of alternate high impedance electrical discharge arc, but can not find effective trace evidence.In fact alternate high impedance
The electrical fire quantity that electrical discharge arc triggers is most in electrical fire, and dangerous greatly disguise is extremely strong, most electric
Fire belongs to the initiation of this class electric fault.Because alternate high impedance electric discharge produces electric arc and is not only easy to light cotton-shaped easily
Dust is fired, but also can light and reach that the fuel gas of explosion limit causes fire incident.Alternate high impedance electrical discharge arc is to draw
Send out one of most important ignition source of electrical fire.
Prior art is the dangerous key factor of electricity consumption caused by the electric heating effect high temperature of short circuit, excessively stream and electric leakage.It has ignored
To electric arc high impedance and the initiation fire of loose contact electrical discharge arc high temperature action.In fact most of electrical fire all belongs to
Trigger in circuit high resistant and loose contact electrical discharge arc class fire.
The content of the invention
Occur and fire hazard system safety testing device it is an object of the invention to provide a kind of alternate high impedance electrical discharge arc, purport
Ignited the simulations such as flammable solid, liquids and gases electrically fire in the generation and electrical discharge arc for simulating alternate high impedance electrical discharge arc
Calamity is tested, and is prevention and cause of fire investigation and evidence collection, the technology of material evidence identification of alternate high impedance electrical discharge arc class electrical fire
The expansion in field provides theories integration and scientific and technical evidence.
The present invention is achieved in that a kind of alternate high impedance electrical discharge arc occurs and fire hazard system safety testing device includes
One has the wooden case and two two phase conductors that one side is open, and two wires are arranged in wooden case, and two wires are not contacted, and distance is protected
Hold between 5~50mm, used on two wires and infiltrated water or acid, alkali, the strip cotton fiber of salting liquid or other quality fibre
Tie up contact connection together, two wires of the device are accessed in line by switch and breaker protector.
Effect collects
Being ignited invention emulates the generation of alternate high impedance and loose contact electrical discharge arc and electrical discharge arc flammable must consolidate
The simulation electrical fire experiment such as body, liquids and gases, is that prevention and the fire of alternate high impedance electrical discharge arc class electrical fire are former
Because investigation and evidence collection, the expansion of the technical field of material evidence identification provide theories integration and scientific and technical evidence.
Brief description of the drawings
Fig. 1 is the knot of alternate high impedance electrical discharge arc generation provided in an embodiment of the present invention and fire hazard system safety testing device
Structure schematic diagram；
In figure：1st, wooden case；2nd, wire；3rd, cotton or other quality fibers.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Fig. 1 shows the generation of alternate high impedance electrical discharge arc and the structure of fire hazard system safety testing device of the present invention, such as
Shown in figure, the present invention is achieved in that a kind of alternate high impedance electrical discharge arc occurs and fire hazard system safety testing device includes
One has two wires 2 of wooden case 1 and two-phase that one side is open, and two wires 2 are arranged in wooden case 1, and two wires 2 are not contacted,
Distance is maintained between 10~50mm, with having infiltrated water or acid, alkali, the strip cotton fiber of salting liquid or other quality fiber contacts
Property connection it is same, two wires of the device pass through switch and breaker protector is accessed in line.
The operation principle of the present invention is described in further details with reference to specific embodiment：
Closing will between the switch of alternate high impedance electrical discharge arc generation and fire risk experimental provision, two wires 2
The alternate high impedance electrical discharge arc of generation of interruption, when having flammable or inflammable solid, liquid or gaseous combustible thing around, will be lighted
Combustible triggers fire.
The switch of alternate high impedance electrical discharge arc generation and fire risk experimental provision is disconnected, leading in wooden case 1 is removed
Line 2, with the naked eye or Stereo microscope examines the outer surface of wire 2, sees whether there is high arc temperature melting trace, and experimental result is leads
The outer surface of line 2 does not have the appearance of high arc temperature melting trace, illustrates, the alternate electric discharge of high impedance is actual equivalent to small-power heating electricity consumption
Device.
Thus illustrate：
1st, phase insulation electric wire insulaion resistance caused by humidity, burn into aging etc. are acted on declines to a certain extent, phase occurs
Between discontinuity conducting electric discharge phenomenon.
2nd, impedance short circuit dischange electric arc feature：The arcing sounds and arclight typically produced are all larger, there is discontinuity feature,
Arc-melting vestige is not formed, and when alternate high impedance short circuit dischange generation electric arc occurs for split conductor, only indivedual cores have can
It can fuse and form the molten trace of very little, if not careful observation is it could even be possible to can't see this electric heating melting trace, this results in some
The reason for fire caused by alternate high impedance short circuit dischange generation electric arc is not easily found effective material evidence.But alternate high impedance is short
Road electric discharge can really produce the cotton-shaped combustibles of spark ignition solid-state, flammable liquid and fuel gas when producing electric arc and cause fire thing
Therefore, really go out not leaving arcing vestige substantially in electric arc.
In fire investigation, when fire location or point of origin being determined in scene of fire, if it is known that this principle, fire
During calamity scene inspection, if during short-circuit protector tripping, short-circuit trace evidence can be searched.If, can be with during the non-tripping of short-circuit protector
Lookup arcing vestige should not be forced, and should be according to the relation between live inflammable or combustible and electric wire and circuit two
The concrete condition analysis of phase conductor determines the possibility of alternate high impedance electrical discharge arc effect.
In fire investigation, when fire location or point of origin being determined in scene of fire, if it is not known that this principle
When short-circuit protector does not have tripping, often think that it is not electrical fire that carelessness, which is determined, as a result alternate high impedance without short circuit
Electrical discharge arc initiation fire have ignored.As a result take very big man power and material and look for other ignition sources, it is gainless, most
After can not assert initiation fire the reason for.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, not to present invention protection model
The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need to pay various modifications or deform still within protection scope of the present invention that performing creative labour can make.
Claims (2)
1. a kind of alternate high impedance electrical discharge arc occurs and fire hazard system safety testing device, it is characterised in that described device bag
A wooden case and two two phase conductors for having one side to be open is included, two wires are arranged in wooden case, and two wires are not contacted, two
Used on bar wire and infiltrated water or acid, alkali, the strip wool fiber contacts connection of salting liquid, two wires of the device are by opening
Close and breaker protector is accessed in line, will produce alternate high impedance by phased manner during closure switch, between two wires and put
Electric arc, electric arc can light flammable around or inflammable solid, liquid or gas and trigger fire.
2. alternate high impedance electrical discharge arc as claimed in claim 1 occurs and fire hazard system safety testing device, it is characterised in that
Two wire is not contacted, and distance is maintained between 5~50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410271364.3A CN104049187B (en) | 2014-06-18 | 2014-06-18 | A kind of alternate high impedance electrical discharge arc and fire risk experimental provision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410271364.3A CN104049187B (en) | 2014-06-18 | 2014-06-18 | A kind of alternate high impedance electrical discharge arc and fire risk experimental provision |
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| CN104049187A CN104049187A (en) | 2014-09-17 |
| CN104049187B true CN104049187B (en) | 2017-10-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107854799B (en) * | 2017-12-07 | 2022-12-30 | 应急管理部上海消防研究所 | Multi-scene electrical short circuit simulation experiment device and method |
| CN110208627B (en) * | 2019-06-20 | 2021-06-25 | 应急管理部四川消防研究所 | Method for testing fire prevention and control capability of over-current ignition source prevention and control device |
| CN110221149B (en) * | 2019-06-20 | 2021-09-07 | 应急管理部四川消防研究所 | Device and method for testing fire prevention and control capability of poor-contact ignition source prevention and control device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1034838C (en) * | 1994-02-05 | 1997-05-07 | 杨稔芳 | Electric line firing source simulator |
| CA2643060A1 (en) * | 2006-02-21 | 2007-08-30 | The Governors Of The University Of Alberta | Analysis of thin liquid films |
| CN202057763U (en) * | 2011-04-02 | 2011-11-30 | 中国南方电网有限责任公司超高压输电公司梧州局 | Experimental device of simulating high voltage transmission line flashover discharge triggered by forest fire |
| KR101993746B1 (en) * | 2012-09-10 | 2019-09-30 | 삼성전자주식회사 | Arc fault detecting apparatus, electrical apparatus and method for controlling the same |
| CN103235246B (en) * | 2013-05-08 | 2016-04-20 | 上海电缆研究所 | The aviation wire experimental provision of resistance to electric arc and experimental technique thereof |
| CN203259625U (en) * | 2013-05-08 | 2013-10-30 | 上海电缆研究所 | Aviation wire wet arc droplet container |
| CN103776973B (en) * | 2014-03-04 | 2015-08-05 | 中山大学 | A kind of electrical fire short circuit analogue means and analogy method thereof |
| CN103839473B (en) * | 2014-03-07 | 2016-08-17 | 中山大学 | Electrical fire Scenario experiences device and control method thereof |
| CN203909224U (en) * | 2014-06-18 | 2014-10-29 | 公安部四川消防研究所 | Inter-phase high-impedance discharge arc and fire risk experiment device |
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