
the current that would flow in the circuit if each pole of the switching device or the fuse were replaced by a conductor of negligible impedance NOTE - The method to be used to evaluate and to express the prospective current is to be specified in the relevant publications.
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http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=441-17-01

the current that would flow in the circuit, if each main current path of the switching device and of the overcurrent protective device, if any, were replaced by a conductor of negligible impedance NOTE - The prospective current can be qualified in the same manner as an actual current, for example: prospective breaking current, prospective peak curr...
Found on
http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=442-01-47
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