Reliability Assessment of Polymer Insulators for Power Distribution System using Characterization Techniques

특성분석 기법을 이용한 배전용 폴리머애자의 신뢰성 평가

This study describes the reliability assessment of 3 years-aged polymer insulators using polymer characterization techniques such as SEM, contact angle, DSC, FTIR. Two kinds of polymer insulators were dismounted from 5 fields. All polymer insulators showed the micro-cracks and the reduction of characteristic peaks on the shed surface. Contact angle was increased with time. Although some superficial changes have occurred, there are no significant changes in various properties. Comparison of dismounted insulators to new ones revealed that the field-aged insulators are reliable for the present.