The propaganda from the fuse makers notes that if they don't blow, they cost less than breakers over time, and this is true.
In your house, you constantly have hairdryers, microwaves, TVs, and other appliances on at the same time. I rented one place that had the kitchen, dining room, and living room on the same 15A breaker. The Saturday cardiac power breakfast involved timing of the microwave, toaster, coffee maker, waffle maker, and then the TV could come on while we ate.
In an industrial setting, tripping the circuit is less likely because (hopefully) it was wired by a professional who knew what he was doing.
Fuse characteristics are better than breakers. They have a much higher interrupt rating. A Class J or RK will open 200000 Amps. The typical breaker is lucky if it can open 5000 Amps.
I have a hybrid rule. I prefer breakers on smaller "science experiments" in industrial settings, and in the home. Here they are likely to trip often and we don't want them finding and installing a new fuse even if they do find the right size.
On big plant type things, the fuse rules. A 200A breaker can run well over a grand if not two. A good set of fuses and holder may set you back $500. I would also prefer that it comes as close as possible to being able to open a direct lightning strike and limit arc flash.
The RK and J type fuses usually guarantee "no-damage" which means when properly sized for the application, they will open before a non-POS component gets cooked.
Each has its role. Consider the application and likely situations that will arise.
Matt
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