Semiconducting Glaze (SCG) Insulator (DURASSTOR®)

NGK supply Suspension (Disk), Line Post and Station Post Insulators coated with semiconducting glaze.

When contaminated surface is moistened, leakage current flows in wetted contaminant. And then non-uniform current density forms dry band.

Semicoducting Glaze Insulator

Ordinary Glaze Insulator

Partial arc at dry band

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Features

• Excellent Anti-Contamination Performance: Withstand voltage of SCG insulators is higher than that of polymer and ceramic insulators.
• Excellent Corona Suppression Characteristics: No corona discharge even in heavy contamination condition.
• Long Term Performance confirmed by service experience.