Study on Influence Characteristics of Polyimide Protective Material on Gas Arc Radiation Temperature Field
Electrical ignition injuries from arcing are becoming more frequent in urban power grid.Polyimide,as an arc protection material,has high temperature resistance and high heat resistance,and is an effective facility to pro-tect the safety of live workers.However,at present the study on the actual heat resistance effect of polyimide arc pro-tection materials is relatively less.In this paper,a simulation model of gas arc temperature filed under the influence of the polyimide is set up and the influence of polyimide on the arc radiation temperature field distribution during the arcing process is obtained.A gas arc generating device is set up in the laboratory,the variation of the polyimide pro-tection material to the gas arc radiation temperature field is obtained by way of changing the magnitude of arc cur-rent,the distance between the arc electrodes and the distance from the measurement point of the copper calorimeter to the center of the arc as well as of temperature rise measurement by copper calorimeter.The simulation and test re-sults show that the polyimide has obvious blocking effect on the radiation temperature field of gas arc,and shows per-fect heat insulation under different arc radiation conditions,proving that the polyimide material has excellent protec-tion performance against gas arc radiation in the live working environment.
arctemperature fieldfinite element simulationpolyimidearc-preventive fabricthermal-preventive performance
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