Typical safe ability of Transformer, Generator and Cable to withstand Isc – short circuit fault

Typical safe ability of Transformer, Generator and Cable to withstand Isc - short circuit fault current in multiple of its In - rated current, without damage to the equipment.

Following are the Typical safe ability of Transformer, Generator and Cable to withstand Isc – short circuit fault current in multiple of its In – rated current, without damage to the equipment.

Device /
Equipment		Isc Fault Current
as multiple of In		Safe Withstand Duration
without damage
TransformerIsc = 25 x In300 Sec
GeneratorIsc = 30 x In5 Sec
CableIsc = 25 x In1000 Sec
Trafo, Genset and cable, fault current withstand durations without damage
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