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 protect the safety of live workers. However

at present the study on the actual heat resistance effect of polyimide arc protection 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 protection material to the gas arc radiation temperature field is obtained by way of changing the magnitude of arc current

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 results show that the polyimide has obvious blocking effect on the radiation temperature field of gas arc

and shows perfect heat insulation under different arc radiation conditions

proving that the polyimide material has excellent protection performance against gas arc radiation in the live working environment.