It is essential for personnel safety, equipment protection, and system reliability that power system equipment be adequately rated for the maximum short circuit currents. The short circuit study calculates the maximum available fault currents throughout the system and establishes the adequacy of the equipment short circuit ratings to assure a safe, reliable system.
For new facilities, a short circuit study should be performed before the electrical equipment is selected. For existing facilities, a short circuit study should be performed if significant changes have occurred either within the facility or in the utility system.
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