Transcription of Introduction to Short Circuit Analysis
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Introduction to Short Circuit Analysis
PDH Course E204 Page 1 of 40 Introduction to Short Circuit Analysis Course Content A Short Circuit is a low-resistance connection established by accident or intention between two points in an electric Circuit . This excessive electric current potentially causes Circuit damage, overheating, magnetic stress, arcing, fire or explosion. The amount of current that is available in a Short Circuit is determined by the capacity of the system voltage sources and the impedances of the system, including the fault. In Circuit Analysis , the term Short Circuit is used by analogy to designate a zero-impedance connection between two nodes. This forces the two nodes to be at the same voltage. In an ideal Short Circuit , this means there is no resistance and no voltage drop across the Short . The electrical opposite of a Short Circuit is an open Circuit , which is infinite resistance between two nodes.
The primary objective of short circuit study is to provide necessary over current protection devices in the distribution system that will prevent injury to personnel, minimize damage to system components, and limit the extent and duration of service interruptions during equipment failures, overload or short circuit conditions. It is important ...
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