What type of switch is a high voltage switch that operates under oil?

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A high voltage switch that operates under oil is known as an oil switch. This type of switch utilizes oil as an insulating and cooling medium, helping to dissipate heat generated during operation and providing excellent dielectric properties for high voltage applications. When the switch operates, the contacts can interrupt the circuit while submerged in oil, which helps to extinguish arcs that occur during the switching process and improves safety and reliability. This makes oil switches particularly suited for protecting electrical circuits in substations and heavy industrial applications where high voltage operations are common.

In contrast, air switches rely on air for insulation and arc extinction, pressure switches operate based on changes in pressure within a system, and magnetic switches generally use electromagnetic forces for their operation, but none of these utilize oil as part of their functional mechanism in high voltage applications.

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