IEEE

IEEE 551-2006

Recommended Practice for Calculating AC Short-Circuit Currents in Industrial and Commercial Power Systems

IEEE 551-2006

Recommended Practice for Calculating AC Short-Circuit Currents in Industrial and Commercial Power Systems


IEEE 551-2006

Рекомендуемая практика для расчета переменного тока короткого замыкания в промышленных и коммерческих энергосистем


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Дата ввода
17.11.2006
Дата утверждения
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Электронная версия ( PDF ) 267.00
Печатная копия 328.50
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IEEE 551-2006 Recommended Practice for Calculating AC Short-Circuit Currents in Industrial and Commercial Power Systems

IEEE 551-2006 Рекомендуемая практика для расчета переменного тока короткого замыкания в промышленных и коммерческих энергосистем

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Electric power systems in industrial plants and commercial and institutional buildings are designed 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 commonly called. Uncontrolled short-circuits can cause service outage 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. 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—the circuit breakers and fusible switches. A short-circuit current generates heat that is proportional to the square of the current magnitude, I2R. The large amount of heat generated by a short-circuit current may damage the insulation of rotating machine

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[3] IEEE Industry Applications Society

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