이종절연재에 따른 연면절연특성 비교

Surface Discharge Characteristics in Different Media Materials

With the improvement of industrial society, the high quality electrical energy, simplification of operation and maintenance, ensuring reliability and safety are being required. This paper reviews a basic data of the surface discharge characteristics for teflon resin in not only pure N2, N2:O2 mixture gas and Dry-Air as being focused on environmentally friendly insulating Gas also SF6. An experimental set-up of electrodes are utilized as a type of knife-to-knife. With the changing distance of electrodes and pressure, we can find surface discharge voltages and surface dielectric strengths respectively. Surface discharge Voltages of N2:O2=80:20 mixture gas are more higher than the N2:O2 Mixture gases. we verify replaceability of Imitation-Air according to gas pressure and gap as well as gas pressure to replace 1[atm] SF6 gas when eco-friendly Imitation-Air is applied to insulation design of various HV power equipment instead of SF6 gas. As a result, it is verified that the gas pressure of Imitation-Air which correspond to the breakdown voltage of SF6 1[atm] is about 3[atm] at distribution class.