ABSTRACT
This chapter aims to show the main different aspects of design and their influence in the performance of shell form transformers. It provides a wide range of material on large-shell-type transformers. A transformer is a device for stepping up, isolating, or stepping down the voltage of an alternating electric signal, and it is widely used for transferring energy from an alternating current in the primary winding to that in one or more secondary windings. The power transformer core, which provides the magnetic path to channel the flux, consists of thin sheets of high-grade steel, called laminations, which are electrically separated by a thin coating of insulating material. The power transformer windings are typically stranded with a rectangular cross section, although some transformers at the lowest ratings may use sheet or foil conductors. Although transformers are primarily classified according to their function in a power system, they also have subsidiary classifications according to how they are constructed.
