ABB GSU Core-type Transformer

Although transformers come in a variety of sizes and configurations, they consist of two main components: the core, which is made of high-permeability, grain-oriented, silicon electrical steel, layered in pieces; and windings, which are made of copper conductors wound around the core, providing electrical input and output. Two basic configurations of core and windings exist, the core form and the shell form.

In a core-type power, cylindrical legs windings cover the core leg