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IEEE 551-2006 Recommended Practice for Calculating Short-Circuit Currents in Industrial and Commercial Power Systems

Timothy L. O'Hearn, PE

This 8-hour course is concerned with the recommended practice for calculating short-circuit currents in industrial and commercial power systems. Short circuits are caused by faults in the insulation of a circuit, and in many cases an arc ensues at the point of the fault. Such an arc may be destructive and may constitute a fire hazard. Prolonged duration of arcs, in addition to the heat released, may result in transient overvoltages that may endanger the insulation of equipment in other parts of the system. Clearly, the fault must be quickly removed from the power system, and this is the job of the circuit protective devices, for example circuit breakers and fusible switches.

The intent of the course is to provide a practical, general treatise for engineers on ac short-circuit currents in electrical power systems. The focus of this course is the understanding and application of analytical techniques of short-circuit analysis in industrial and commercial power systems. Electrical engineers can use this information in the design of electrical power systems to serve loads in a safe and reliable manner. One of the major considerations in the design of a power system is adequate control of short-circuits or faults as they are called. Uncontrolled short-circuits can cause service outages with accompanying production downtime and associated inconvenience, interruption of essential facilities or vital services, extensive equipment damage, personnel injury or fatality, and possible fire damage. This is a practical way to receive continuing educational credits for reading and understanding the content of this very important industry standard.

This course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of the course materials.

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NY PE & PLS: You must choose courses that are technical in nature or related to matters of laws and ethics contributing to the health and welfare of the public. NY Board does not accept courses related to office management, risk management, leadership, marketing, accounting, financial planning, real estate, and basic CAD. Specific course topics that are on the borderline and are not acceptable by the NY Board have been noted under the course description on our website.