Bolted Fault

A short circuit condition that assumes zero impedance exists at the point of the fault.

The maximum available fault current at some point in the electrical system.

When doing these calculations remember to include the impedances of parts, cables etc as these may lower the maximum current and result in longer tripping times.

The bolted fault may be the highest magnitude fault, but may not be the worst case scenario for arc flash.

See also: Arc Flash, Short-Circuit.

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Subjects: Electrical Engineering