Zusammenfassung
This paper describes test results on silicone rubber
insulators exposed in a field test station for one year. We have
been making the research and development of polymer insulators
since 1960. Many field tests have been conducted in various
countries. One of the recent field tests in Japan on polymer
insulators started in 1995, to investigate their long term
reliability and contamination performance. The test station is
located 50m apart from sea shore. Applied voltages to the
specimen insulators are 30kV AC and - lOOkV DC. De-energized
insulators are also exposed in the same station for comparison.
Leakage currents of those insulators were measured
continuously, and the relationship between the leakage current
and the meteorological data and contamination degree was
investigated. Leakage currents over lOOmA were measured even
on the silicone rubber insulators under strong sea winds.
The specimens energized with DC voltage are more
contaminated with black material than that energized with AC
voltage. But hydrophobicity of those insulators is kept intact and
no sign of deterioration is observed.
Nutzer