Test results of high voltage post insulators thai 10 kilovolts staining under extreme conditions. The mess that gradually accumulates on the surface of the insulators insulators when sasommakkrasae the more leaks, where weather conditions are. As a result, staining on the surface of the insulators and insulators for electrical stress. The heat from corona discharge for long periods, resulting in degradation of the insulation, insulators and cause damage to the system and cause the insulation. Born to deteriorate faster, shorter lifespan.
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