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Fault Current Analysis
The short circuit (called fault in this chapter) is dened as a live conductor touching
another live conductor or ground in a grounded system. It can happen accidentally
or when the insulation in-between breaks down. The result is an abnormally high
current that can cause mechanical and thermal damage to all equipments in series
leading to the fault. The magnitude of prospective fault current at a given location
in the system determines the current interrupting capability of the fuse or circuit
breaker that must be placed between the power source and the fault location in order
to protect the system from a potential ...