Substation1
Dictionary of Electrical Engineering

Commonly used terms in the Electrical industry.

dead tank breaker
a power circuit breaker where the tank holding the interrupting chamber is at ground potential. Oil circuit breakers, for example, are typically dead tank breakers.
surge tank
an empty vessel located at the top of the penstock. It is used to store water surge when the turbine valve is suddenly closed.
tank
the container for the coils and core of a transformer, which is usually oil-filled for insulation and cooling.