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Wu Y.,Key Laboratory of Fire Scene Investigation and Evidence Identification | Wu Y.,Shenyang Fire Research Institution | Han D.-C.,Shenyang Gas Cylinder Safety Technology Co.
Advanced Science Letters | Year: 2012

The in-depth composition of carbon and oxygen in copper beads formed by arc and fire were studied by XPS, respectively. Corresponding to the sputtering depth, the molten product on an arc bead surface layer is with drastic decrease of carbon content and with gentle change of oxygen content which then rapid decreases. While the molten product on a fire bead surface layer is with carbon content decreasing gradually and with oxygen content increasing. As a result, the distributing of C and O and the quantitative results can be used to identify the molten product on a bead induced directly by arc and the molten product on a bead formed by fire, as complementary technique for judgments of fire cause. © 2012 American Scientific Publishers. All rights reserved.


Meng Q.S.,Shenyang Fire Research Institute | Meng Q.S.,Key Laboratory of Fire Scene Investigation and Evidence Identification
Applied Mechanics and Materials | Year: 2014

This paper described the microstructure feature of the first short circuit and the second short circuit of copper wires in the electrical equipment line fire. The cause of fire is evaluated and analyzed by the difference in microstructure between the first short circuit and the second short circuit of copper wire. It would provide scientific and favorable evidence for the department of fireman to clear up a case of fire. © (2014) Trans Tech Publications, Switzerland.


Wang L.T.,Shenyang Fire Research Institute | Gao W.,Key Laboratory of Fire Scene Investigation and Evidence Identification
Advanced Materials Research | Year: 2012

When fire breaks out, the gas composition and concentration as well as smoke concentration of burning part vary from those in normal environment. The gas and smoke absorbed during solidification of short circuited melted mark occurred in such environment will certainly have an effect on grain shape, grain size, holes distribution and impurity element distribution of organization of melted mark. The gas in the environment has a certain influence on the organization of short circuited melted mark, but the influence is smaller than that of smoke. The reason may be that the gas is mingled with certain amount of tiny smoke particles inevitably which play a role in the solidification of melted mark. Compared with short-circuit samples in normal atmosphere, carbon content of short-circuit samples increases and oxygen content decreases in the environment of smoke. © (2012) Trans Tech Publications, Switzerland.


Qi Z.-B.,Shenyang Fire Research Institute of Ministry of Public Security | Qi Z.-B.,Key Laboratory of Fire Scene Investigation and Evidence Identification | Gao W.,Shenyang Fire Research Institute of Ministry of Public Security | Gao W.,Key Laboratory of Fire Scene Investigation and Evidence Identification | Zhang Y.-C.,Shenyang Fire Research Institute of Ministry of Public Security
Procedia Engineering | Year: 2013

Any arc fault is a dangerous and multiple electrical faults that is one of the main reasons to cause civil building electrical fire in our country. Describe briefly the current situation of researches for prevention of electric arc faults at home and abroad. Develop according to the arc fault features a simulation test device which can produce real electric circuit fault arcs and present the principle of operation, the mechanical principle block diagram and the validation test results. This equipment can produce real electrical faulting arc and it not only can be used for the basic theory research of electric arc faults, but also can be used in the testing of electric arc fault protection products. © 2013 The Authors. Published by Elsevier Ltd.


Qi Z.-B.,Northeastern University China | Qi Z.-B.,Shenyang Fire Research Institute of Ministry of Public Security | Qi Z.-B.,Key Laboratory of Fire Scene Investigation and Evidence Identification | Gao W.,Shenyang Fire Research Institute of Ministry of Public Security | Gao W.,Key Laboratory of Fire Scene Investigation and Evidence Identification
Dongbei Daxue Xuebao/Journal of Northeastern University | Year: 2013

An experimental platform for fault arc in series was constructed and studied. By using the platform, a study on ignition of typical combustibles by fault arc in series was conducted to analyze the effect of different loads and frequency of electrode on the ignition probability. The relationship between the arc number and ignition probability for typical combustibles under certain load was concluded. It is shown that degreasing cotton for inductive load and capacitive load has a higher ignition probability if the arc number is the same. Finally, based on the test results and characteristics of power supply system of our country, some protective and prevention measures were summarized and applied in the draft standard for fault arc protective products.

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