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Insulating gas High-voltage gas-insulated switchgear purification device wika

Insulator (electricity) - Wikipedia(electricity)Overhead conductors for high-voltage electric power transmission are bare, and are insulated by the surrounding air. Conductors for lower voltages in distribution may have some insulation but are often bare as well. Insulating supports called insulators are required at the points where they are supported by utility poles or transmission towers.Insulators are also required where the wire enters ...

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