What is hv bushing in transformer?

In a power transformer, the high voltage winding is located closer to the core, and the low voltage winding is closer to the outer shell. The HV bushing is used to connect the high voltage winding to the high voltage terminals, which are usually located on the top of the transformer tank. The bushing provides a safe and reliable electrical connection, as it is designed to withstand the high voltage and current levels present in the transformer.

HV bushings are typically made of insulating materials such as porcelain or polymer, which have high dielectric strength and can withstand high temperatures. The insulating material used in the bushing must be able to withstand the electrical and thermal stresses of the transformer, as well as the outdoor environmental conditions.

HV bushings can be designed for different voltage and current ratings depending on the transformer's requirements. For example, a transformer with a high voltage rating will require an HV bushing with a higher voltage rating. Similarly, a transformer with a high current rating will require an HV bushing with a higher current rating.

In summary, HV bushings are essential components in power transformers that provide a safe and reliable electrical connection between the transformer windings and high voltage terminals. They are designed to withstand high electrical and thermal stresses and can be tailored to meet the specific requirements of the transformer.