What are the different types of high voltage bushing

High voltage equipment, such as transformers or circuit breakers, must be connected to the conductors that carry the electrical power using a high voltage bushing, a component that is frequently used in electrical power transmission systems. The bushing acts as an electrical insulator to stop electricity from arcing or leaking from the apparatus into the environment. High voltage bushings are often made of materials like porcelain, glass, or epoxy resin and are designed to handle the high voltages and strains involved with such applications.

High Voltage bushings come in a variety of varieties, including:

The most prevalent kind of HV bushings used in transformers are oil-filled bushings. They have a paper or resin-impregnated paper insulation and are filled with insulating oil.

Gas-filled bushings: These bushings insulate with SF6 (Sulfur Hexafluoride) gas. The switchgear that is gas-insulated frequently uses them.

Dry-type bushings: These bushings mostly function indoors and use air as the insulating medium.

Bushings that use a solid resin insulation are known as resin-bonded bushings and are frequently used in outdoor applications. The type of HV bushing chosen will depend on the particular application because each type has advantages and cons of its own.