モールド変圧器の光学式エポキシ樹脂劣化診断技術
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概要
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The mold transformers which use epoxy resins for coil insulation have superior characteristics in fire retardancy and environment resistance. Because of their high reliability, they have been excluded from electric equipment diagnosis in most cases. However, the mold transformers need to diagnose aged deterioration of their resin material because they have been used for more than 40 years. Therefore, we developed the simple and on-site degradation diagnostic device for the epoxy resin.