Obtaining reliable data from electric utilities about magnitude and duration of single-phase, line-to-ground fault currents at the service entrance of commercial and industrial facilities is of critical importance in the design of an end-user substation grounding grid. In ground-fault conditions involving the primary side of a substation, circulation of current through the grounding grid will occur, and touch and step potentials will be present at the end-user’s premises. Ground faults ...

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