Electrical Studies / Analysis

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Protective Device Coordination Study

Protective Device Coordination studies are required to ensure the safety including personnel and general public and to ensure that equipment is not damaged under fault conditions per the requirements of NEC 110-10.  The study includes determining the fault clearing times and coordination of upstream electrical protective devices.  Proper coordination and fault clearing times can help reduce damage to electrical equipment and protect workers from hazards.


Value settings for the protective devices are based on an optimum balance between equipment protection and selective isolation that is consistent with the operating requirements of the overall power system.

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