RK1 and RK5 Fuse Curves
RK1 and RK5 Fuse Curves
(OP)
Hello, I am currently working on a project and need some information on RK1 and RK5 fuse curves. The question has arisen if all bussmann, edison, littlefuse, and ferazz/shamute fuses are the same, ie interchangable.






RE: RK1 and RK5 Fuse Curves
RE: RK1 and RK5 Fuse Curves
RE: RK1 and RK5 Fuse Curves
RE: RK1 and RK5 Fuse Curves
RE: RK1 and RK5 Fuse Curves
RE: RK1 and RK5 Fuse Curves
RE: RK1 and RK5 Fuse Curves
RE: RK1 and RK5 Fuse Curves
RE: RK1 and RK5 Fuse Curves
RE: RK1 and RK5 Fuse Curves
Fuses of the same class and rating of different manucafutrers that you mention are meant to be interchangeable. The differences if any are not significant. The very reason their physical characteristics are standardized is that they "can" be interchanged.
RE: RK1 and RK5 Fuse Curves
...unless in YOUR case the extra let-through or additional clearing time is what allows an arc flash to burn someone or starts a fire, or the reduced clearing time causes a nuisance shut down of a critical machine.
I'm not criticizing rbulsara's answer, merely pointing out that although the INTENT is for the different mfrs versions of the same fuse to be interchangeable, there is no substitute for good engineering practice. In most cases for instance, if you do an Arc Flash evaluation of a system based upon one specific fuse, that evaluation is SPECIFIC to that fuse. If you want something that can accept any brand, you must use the NFPA tables, and the let-through energy is FAR greater than you might get with a more carefully chosen brand because the "generic" chart is based on the lowest common denominator.