Fuses, Series Rating

[physis]

Sam,

While the end result is (or at least should be) "current stopping", an OCPD that is called current limiting does limit the amount of current that flows into the fault compared to a standard type OCPD. This reduces the damage and the extent of the arc flash.
Don

Well that makes more sense. Like I said, I'm not familiar with these things. I should probably check 'em out before arguing about the terminology.

 

[davidr43229]

The term of Current-Limitation is different for Circuitbreakers than it is for Fuses.
A Current limiting fuse totally clears within 1/2 cycle .008 ( 1 cycle=.016sec), thus limiting the fault to a partial of what could actually be realized, had you placed a non current limiting device in the circuit. UL has unbrella rating for different Classes of fuses.
The term on current limitation for circuit breakers (UL489), has to limit the fault to 80% of it asemetric value (let through).
Just my $.02