A New System Tested the Dielectric Characteristic of High-Resistance Powder
The Dielectric Characteristic of high-resistance powder, such as industry powder, chemical raw material, soil and suspend particle in atmosphere, is important to study electrostatic precipitate, electrostatic coating, lightning stroke and contamination flashover of high-voltage equipment. A new test system has been studied. The test range of specific resistivity is from10 4 Ω?cm to 10 14 Ω?cm, the test range of voltage is from 0.5kV to 30kV (direct current), the least leak current is 10 -9 A, and the range of test temperature is from room temperature to 300. ℃ By studying on the volt-ampere characteristic, the resistivity characteristic and the electric breakdown characteristic of fly ash burned coal, it is found that the relation among the voltage forced to the ash layer, the leak current flowed to the ash layer and the specific resistivity of fly ash does not always follow the classical ohms law, that is, V/I is not always constant. The volt-ampere characteristic curves of fly ash have different shapes while the voltage is in the different phases.
Test system Dielectric characteristic Power Application
Qi Liqiang Yuan Yongtao Zeng Fang
Environmental Science and Engineering School,North China Electric Power University,Baoding 071003 China
国际会议
西安
英文
2007-08-16（万方平台首次上网日期，不代表论文的发表时间）