ABSTRACT
Transformers are everywhere-in all parts of the power system, among all
voltage levels, and existing in many different sizes, types, and connections.
Small transformers of about 3 to 200 kVA can be observed mounted on power
distribution poles in many areas. A 325 MVA, 230-115 kV autotransformer
with a 13.8 kV tertiary is shown in Figure 9.1.
