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.
protective devices such as fuses and circuit breakers do not offer the same level of personal protection against faults involving current flow to earth. Why is a short circuit dangerous? A short circuit always involves the flow of uncontrolled current that …
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