CN203909224U - Inter-phase high-impedance discharge arc and fire risk experiment device - Google Patents
Inter-phase high-impedance discharge arc and fire risk experiment device Download PDFInfo
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- CN203909224U CN203909224U CN201420324671.9U CN201420324671U CN203909224U CN 203909224 U CN203909224 U CN 203909224U CN 201420324671 U CN201420324671 U CN 201420324671U CN 203909224 U CN203909224 U CN 203909224U
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Abstract
The utility model discloses an inter-phase high-impedance discharge arc generation and fire risk test device comprising a wooden case of which one surface is provided with an opening, and two two-phase conductive wires which are installed in the wooden case. The two conductive wires are not contacted, and distance is maintained within 5-50mm. The two conductive wires are communicated in a contact way by using strip-shaped cotton fiber or fiber with other textures infiltrated with water or acid, alkali and salting solution. The two conductive wires of the device are accessed to a commercial power line via a switch and an open circuit protector. Generation of inter-phase high-impedance discharge arc is simulated and electrical fire hazard simulation tests of igniting inflammable solid, liquid and gas via discharge arc are simulated so that theoretical support and science and technology evidence are provided for prevention of inter-phase high-impedance discharge arc type electrical fire hazard and expansion of the technical field of investigation and evidence obtaining of fire hazard causes and physical evidence identification.
Description
Technical field
The utility model belongs to electric and fire prevention field, relates in particular to a kind of alternate high impedance electrical discharge arc and occurs and fire hazard system safety testing device.
Background technology
Cause insulation course aging according to circuit phase insulation electric wire because of the effect such as moist, burn into is aging, insulation resistance drops to a certain degree, or insulation course breakage exposes conductor, appearance alternate with fiber or dust make moist, or the phenomenon of the aging discontinuity conducting electric discharge of phase insulation burn into.In the time there is alternate high impedance electrical discharge arc generation in circuit, produce discontinuity electric arc and produce high arc temperature effect, high temperature action can make insulation course charing, and charring layer further strengthens the meeting of alternate high impedance Electrical Discharge Machine, forms vicious cycle.Alternate high impedance electrical discharge arc leaves the feature hint of high arc temperature effect as use, but forms melting trace at arcing place hardly.If after high arc temperature initiation fire, after the effect of experience high temperature of fire, the feature hint of high arc temperature effect will be covered by fire effect, substantially cannot find this class vestige.Only on superfine little multicore cable, may occur smallly dissolving vestige or the trace that fuses individually, visual inspection likely can not be found this electric heating melting trace.This just means that some electrical fire causes because of alternate high impedance electrical discharge arc, but cannot find effective trace evidence.In fact in electrical fire at most, greatly dangerous, disguised extremely strong, most electrical fires all belong to that this class electric fault causes to the electrical fire quantity that alternate high impedance electrical discharge arc causes.Because alternate high impedance discharge generation electric arc is not only easy to light cotton-shaped inflammable dust, cause fire failure but also can light the inflammable gas that reaches explosion limits.Alternate high impedance electrical discharge arc is one of most important ignition source causing electrical fire.
Prior art is mainly summed up as electricity consumption danger due to the electric heating effect high temperature of short circuit, overcurrent and electric leakage.Ignore the initiation fire to electric arc high impedance and loose contact electrical discharge arc high temperature action.In fact most electrical fires all belongs to circuit high resistant and the initiation of loose contact electrical discharge arc class fire.
Utility model content
The purpose of this utility model is to provide a kind of alternate high impedance electrical discharge arc to occur and fire hazard system safety testing device, be intended to simulate the generation of alternate high impedance electrical discharge arc and electrical discharge arc flammable the electric fire tests of simulation such as solid, liquids and gases that ignite, for prevention and the cause of fire of alternate high impedance electrical discharge arc class electrical fire are investigated and collected evidence, the expansion of the technical field of material evidence qualification provides theoretical and supports and scientific and technical evidence.
The utility model is to realize like this; a kind of alternate high impedance electrical discharge arc occurs and fire hazard system safety testing device comprises wooden case and two two phase conductors that have an opening; article two, wire is arranged in wooden case; article two, wire does not contact; distance remains between 5～50mm; same with the strip wool fiber or the connection of other quality fiber contact that have infiltrated water or acid, alkali, salt solusion on two wires, two wires of this device are by switch and breaker protector access line.
effect gathers
The utility model has been simulated the generation of alternate high impedance and loose contact electrical discharge arc and electrical discharge arc flammable the electric fire tests of simulation such as solid, liquids and gases that ignite, for prevention and the cause of fire of alternate high impedance electrical discharge arc class electrical fire are investigated and collected evidence, the expansion of the technical field of material evidence qualification provides theoretical and supports and scientific and technical evidence.
Brief description of the drawings
Fig. 1 is that alternate high impedance electrical discharge arc that the utility model embodiment provides occurs and the structural representation of fire hazard system safety testing device;
In figure: 1, wooden case; 2, wire; 3, cotton or other quality fiber.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.There is not the innovation of method or software in the utility model.
Fig. 1 shows the structure of alternate high impedance electrical discharge arc generation of the present utility model and fire hazard system safety testing device, as shown in the figure, the utility model is to realize like this, a kind of alternate high impedance electrical discharge arc occurs and fire hazard system safety testing device comprises wooden case 1 and two wires 2 of two-phase that have an opening, article two, wire 2 is arranged in wooden case 1, article two, wire 2 does not contact, distance remains between 10～50mm, with having infiltrated water or acid, alkali, the strip wool fiber of salt solusion or other quality fiber contact are communicated with same, two wires of this device are by switch and breaker protector access line.
Below in conjunction with specific embodiment, principle of work of the present utility model is described in further details:
The switch of closed alternate high impedance electrical discharge arc generation and fire risk experimental provision, the alternate high impedance electrical discharge arc of 2 generations that will be interrupted of two wires, while having around flammable or inflammable solid, liquid or gaseous combustible thing, will light combustible initiation fire.
Disconnect the switch of alternate high impedance electrical discharge arc generation and fire risk experimental provision, take off the wire 2 in wooden case 1, with the naked eye or Stereo microscope examine wire 2 outside surfaces, see and have or not high arc temperature melting trace, experimental result is that wire 2 outside surfaces do not have high arc temperature melting trace to occur, the actual miniwatt heating electrical appliance that is equivalent to of the alternate electric discharge of high impedance is described.
Explanation thus:
1, because the effect such as moist, burn into is aging causes insulation resistance to drop to a certain degree, there is the phenomenon that alternate discontinuity conducting is discharged in phase insulation electric wire.
2, impedance short circuit dischange electric arc feature: general electric arc sound and the arclight producing is all larger, there is discontinuity feature, do not form arc-melting vestige, in the time there is alternate high impedance short circuit dischange generation electric arc in split conductor, only there are indivedual cores likely to fuse and form very little molten trace, if this electric heating melting trace is even likely can't see in not careful observation, this is not easy to find the reason of effective material evidence with regard to the fire that causes some alternate high impedance short circuit dischange generation electric arc to cause.But alternate high impedance short circuit dischange really can produce electric spark and light solid-state cotton-shaped fire goods, flammable liquid and inflammable gas and cause fire failure while producing electric arc, really go out substantially not stay arcing vestige at electric arc.
In fire investigation, determined fire location or point of origin during in scene of fire, if known this principle, when investigate on the spot scene of fire, if when short-circuit protector tripping, can search short circuit trace evidence.If short-circuit protector when tripping, can not force and search arcing vestige, and should be according to scene the possibility of the alternate high impedance electrical discharge arc of concrete condition Analysis deterrmination effect of relation between inflammable or combustible and electric wire and circuit two phase conductors.
In fire investigation; determined fire location or point of origin during in scene of fire, if do not known that this principle, in the time that short-circuit protector does not have tripping, often thinks and there is no short circuit; careless decision is not electrical fire, and result has been ignored alternate high impedance electrical discharge arc initiation fire.The very large man power and material of result expense removes to find other ignition source, gainless, finally cannot assert the reason of initiation fire.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the not restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendments that performing creative labour can make or distortion still within protection domain of the present utility model.
Claims (2)
1. an alternate high impedance electrical discharge arc occurs and fire hazard system safety testing device; it is characterized in that; described device comprises the wooden case and two two phase conductors that there are an opening; article two, wire is arranged in wooden case; article two, wire does not contact; same with the strip wool fiber or the connection of other quality fiber contact that have infiltrated water or acid, alkali, salt solusion on two wires, two wires of this device are by switch and breaker protector access line.
2. alternate high impedance electrical discharge arc as claimed in claim 1 occurs and fire hazard system safety testing device, it is characterized in that, two wires do not contact, and distance remains between 5～50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420324671.9U CN203909224U (en) | 2014-06-18 | 2014-06-18 | Inter-phase high-impedance discharge arc and fire risk experiment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420324671.9U CN203909224U (en) | 2014-06-18 | 2014-06-18 | Inter-phase high-impedance discharge arc and fire risk experiment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203909224U true CN203909224U (en) | 2014-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420324671.9U Active CN203909224U (en) | 2014-06-18 | 2014-06-18 | Inter-phase high-impedance discharge arc and fire risk experiment device |
Country Status (1)
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| CN (1) | CN203909224U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104049187A (en) * | 2014-06-18 | 2014-09-17 | 公安部四川消防研究所 | Interphase high-impedance discharging arc and fire risk experimental device |
| CN105987929A (en) * | 2015-03-03 | 2016-10-05 | 临沂贝尔检测设备有限公司 | Primary and secondary short circuit test box |
-
2014
- 2014-06-18 CN CN201420324671.9U patent/CN203909224U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104049187A (en) * | 2014-06-18 | 2014-09-17 | 公安部四川消防研究所 | Interphase high-impedance discharging arc and fire risk experimental device |
| CN105987929A (en) * | 2015-03-03 | 2016-10-05 | 临沂贝尔检测设备有限公司 | Primary and secondary short circuit test box |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |