I know it is not the purpose behind current-limiters such as Bussmann UCL50 to reduce available short-circuit current but do they provide any reduction ?
I have a contractor that is 3,000 amps high on his SCA vs his gear AIC and his contention is that the cable current limiters reduce SCA by 20% but I find nothing to document that.
From a Bussman application data sheet:
Their current-limiting feature can be used to minimize arc-flash hazards by reducing
the magnitude of the arc-flash current and the time of the arc-flash exposure.
Unfortunately, unlike for current limiting (J-type, etc.) fuses, I have not been able to find any time/current plots for the current limiters.
It looks hopeful, but I would try to get an Application Engineer from Bussman to weigh in.
Technically, to reduce the required AIC rating of his gear you would need documentation that the current limiter opens during the first fractional cycle before the current has reached a point above the AIC rating of the equipment (or the withstanding current of his equipment if that is really the issue.)
To nail it down and protect from differences of opinion from AHJ or attorneys later, I think you would have to be able to show test results for a particular combination of devices, just as for series rating of breakers.
Long wires or air core reactors to reduce the available current, on the other hand, are subject to simple engineering calculations and would not require testing.
saw the charts. Was not intelligent enough to know what they are telling me.