What is high voltage bushing in transformer?

High voltage bushing is an essential component of a power transformer that helps connect the winding of the transformer to the high voltage electrical network. It plays a crucial role in ensuring the safe and reliable operation of power transformers.

A high voltage bushing's main job is to act as an electrical insulator between the electrical network and the transformer winding. It stops electrical arcing, which can harm the transformer and lead to blackouts. In order to keep the transformer stable and properly aligned, high voltage bushings also offer a reliable mechanical connection between the network and the transformer.

High electrical and mechanical strains are what high voltage bushings are made to resist. Porcelain, paper impregnated with resin or oil, or other materials with excellent electrical characteristics are used to make them. The bushing's design must be able to withstand the high voltage and current levels without failing, which is another important consideration. 

There are two main types of high voltage bushings commonly used in power transformers: oil-filled bushings and dry-type bushings. Oil-filled bushings use transformer oil as the insulating medium, while dry-type bushings use solid insulation materials. Both types have their own advantages and disadvantages, and the choice depends on the specific application and operating conditions.

High voltage bushings must undergo routine maintenance and testing to continue operating in a secure and trustworthy manner. Regular testing can identify early deterioration indicators like partial discharge activity or insulation breakdown, enabling prompt replacements or repairs. High voltage bushings can last longer with proper maintenance, which also reduces the need for expensive downtime.

In conclusion, high voltage bushing is an essential part of power transformers because it offers mechanical stability and electrical insulation. Its proper operation is crucial for secure and dependable power transmission, and they are built to endure tremendous electrical and mechanical strains. High voltage bushings must undergo routine maintenance and testing to guarantee sustained performance and guard against any failures.