Summary
This technical report presents a comparison of ETAP 3-phase duty short-circuit calculations against a published example from IEEE Std 399-1997. The document outlines various aspects of the comparison, including momentary fault currents, interrupting currents, and calculated individual current contributions. It details the system description, which consists of a 44-bus system with both utility tie and in-plant generators, operating under typical load conditions. The report includes specific comparisons of calculated voltages away from the faulted bus, as well as asymmetrical and peak currents. The results indicate a maximum deviation of approximately 0.11% between ETAP results and those published in IEEE Std 399-1997, demonstrating the accuracy of the ETAP calculations. The document also references the relevant sections of the IEEE standard and provides tables that illustrate the comparison results for faults at different buses within the system.
