10 Reasons to Use Per unit

In the advent of computers, per unit or percent methods of calculations simplify short circuit calculations. J. Lewis Blackburn and Thomas J. Domin, in their book Protective Relaying, Principles and …

Rotating-machine Reactance Multipliers

The momentary or first cycle current is used to evaluate the closing or latching of the high voltage circuit breaker. Other selection criteria are the interrupting and symmetrical short circuit …