Why do transformers need to be insulated?

Sufficient insulation between different active parts of the transformer is necessary for its safe operation. Adequate insulation is not only necessary to isolate coils from one another, or from the core and tank, but also ensures the safety of the transformer against accidental over- voltages.

How does a bushing work?

How does a bushing work? Bushings, also called sleeve bearings, are just one specific type of bearings. They are made to slide over rods to provide an extremely low-friction motion. Self-lubrication is achieved through a uniform pattern of indents on the surface of the bushing that act as grease reservoirs.

What is transformer insulation system?

The insulation system is the highest internal temperature a transformer can withstand. Rated in degree Celsius at its highest temperature rating, the insulation system rating can be defined as the maximum allowable operating temperature of a transformer for it to have a normal life expectancy.

What is the difference between a bushing and a sleeve?

As nouns the difference between sleeve and bushing is that sleeve is the part of a garment that covers the arm while bushing is (mechanical engineering) a type of bearing, a cylindrical lining designed to reduce friction and wear inside a hole, often used as a casing for a shaft, pin or hinge.

Whats the difference between bushings and bearings?

A bushing is a thin tube or sleeve that allows relative motion by sliding (our type), as compared to rolling. A bearing is the general term for something that allows relative motion between two components, surfaces, etc. Learn more about what a bearing is.

Why are bearings better than bushings?

There isn’t really a difference: a bushing is a type of bearing. In general, a “bearing” facilitates movement between two parts while reducing friction. Simple in design, the typical bearing has two surfaces that roll over each other, enabling two mating components to move friction-lessly.