O'Reilly logo

Protective Relaying, 4th Edition by Thomas J. Domin, J. Lewis Blackburn

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 9

Transformer, Reactor, and Shunt Capacitor Protection

9.1 Transformers

Transformers are everywhere—in all parts of the power system and between all voltage levels and existing in many different sizes, types, and connections. Small transformers of about 3–200 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.

Figure 9.1

Image of Three-phase 325 MVA, 230:115 kV autotransformer bank with a 13.8 kV tertiary

Three-phase 325 MVA, 230:115 kV autotransformer bank with a 13.8 kV tertiary. (Courtesy of Puget Sound Power & Light Company, Bellevue, WA.)

Usually, circuit breakers or other means of disconnection are available ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required