Per-Unit Method Short Circuit Calculation
I. Introduction In a previous post, the Impedance Method of Short-Circuit Calculation has been presented. To provide a comparative analysis on the accuracy of each calculation, the example provided in …
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 …
IEC 60076-5 Transformer Impedances
The impedance of a power transformer has a direct impact on the total cost of the power system. Cost of power transformer, protective devices, etc will be affected. Electrical Engineers …