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High voltage electrical insulator

An High voltage electrical insulator is a material whose internal electric charges do not flow freely, and therefore make it very hard to conduct an electric current under the influence of an electric field. Some materials such as glass, paper and Teflon, which have high resistivity, are very good electrical insulators. We mainly told about composite insulator.

High voltage insulator                electrical insulator

A perfect high voltage electrical insulator does not exist, because a portion of the insulator could become electrically conductive if the voltage applied across it exceeds the breakdown voltage.

What is the breakdown voltage of a high voltage electrical insulator?
The breakdown voltage of a high voltage electrical insulator, such as polymer insulators, is the minimum voltage that causes a portion of an insulator to become electrically conductive.

High voltage electrical insulators are used in electrical equipment to support and separate electrical conductors without allowing current through themselves. . The high voltage electrical insulator is also used more specifically to refer to insulating supports used to attach electric power distribution or transmission high voltage lines to utility poles and transmission towers. They support the weight of the suspended wires without allowing the current to flow through the tower to ground.

You can learn more about composite insulator in this website, such as composite long rod insulator, composite line post insulator and pin type insulator and so on.

 

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