가열조건이 폴리아미드지의 절연특성에 미치는 영향

A Study on the heating conditions affect on the insulation characteristics of polyamid papers

In this study, we describe comparison of insulation characteristics of polyamid papers with heating conditions. The partial discharge behavior until breakdown and breakdown strength for thermal degradation films are observed in $SF_6$ gas chamber. The four layered NOMEX films of thickness of 50${\mu}m$ were used as solid insulation films and the sphere of which diameter is 40mm to sphere electrode system was used and each insulation films were inserted between sphere electrodes. The used gas pressure was 1.0bar and used temperature was each of 250$^{\circ}C$, 270$^{\circ}C$, 300$^{\circ}C$, 320$^{\circ}C$, 350$^{\circ}C$ and the voltage were applied until breakdown films.