What is this called? and what is used for.

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The primary function of insulators in high-voltage transmission lines is to separate the conductor from the transmission tower in the transmission line.

They create a barrier between the active parts of an electrical circuit and restrict the flow of current to wires or other conducting paths as needed.

In a wire, an electric current occurs when the electron moves.

The insulators are used to insulate the live conductor from the transmission towers and are also required to carry large tensional or compressive loads.

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