Transformer Insulators

Transformer bushing insulators are classified as hollow insulators and are a type of bushing used to separate two different media.

Bushing insulators are insulators used at the entrance of a conductor into the transformer tank and isolate the conductor against the tank.

Energy is transported by a set of conductive rods passing through the insulator. It is generally used in transformers and can also be used to isolate current-carrying conductors passing through walls and building or structure claddings. Nomenclature;

– 30 Meaning of NF 250A 720mm notation
– 30 : Max 36kV operating voltage,
– NF : External Type
– 250A : Max current value to pass through the insulator,
– 720mm: Surface leakage path length (36kV*20kV/mm)