Protection relay codes

Introduction: Numerical codes are sometimes used when defining the protection relay, whereas in other cases symbols are used. The numerical codes refer to the IEEE C37-2 Standard, whereas the symbols…

All About Induction Machines

Introduction Induction machines, also called asynchronous machines, can be used as generators or motors. Induction machines can be either of one or three-phase construction. The following discussion focuses on the…

Electrical characteristics

(Peak) making current: The peak value of the first major loop of the current in one pole of a switching device during the transient period following the initiation of current…