I want to say up front, that this question involves minor modification (transient surge/current suppression) to the power supply side of a power tool. Usually I'd be the last to do anything like this (and never have). But in this case, my basic knowledge of electronics suggests that a trivial component inline with or across the mains supply, would have a very beneficial effect - no opening or changing of the tool itself is intended or would be acceptable. I think "anti surge" plugs also exist that do what I'm after, to underline that it's a safe intention. With that, on to my question.....
I have a power tool. Actually it's one of these, a 2400W 230V rotary concrete saw. I've had one of this model for years, and it's robust and reliable, with one design flaw. If the blade happens to stick, it's handled safely, from a mechanical/safety perspective. But there's clearly some kind of suppression missing or skimped in the design, because it typically also blows the 13A amp mains fuse in the plug.
Since this doesn't happen that often and replacing a fuse is trivial, I've satisfied myself with just keeping a bag of 10 fuses to hand, and replacing if it happens. It's cheaper than any alternative, which is typically an extra £200 for more rigorously built brands such as Makita, Husqvarna and the like - and 230V saws of this kind aren't easily found, so it's a limited market.
But today it clearly stuck bigger than usual because the motor itself has, after 4 years, shorted out. Swap fuse, press start button, 1/2 a second spin and fuse consistently blows. Admittedly it was under heavy use, but still.
As the performance was good, and I never felt endangered by the occasional lapse in surge suppression (it stalled and blew the fuse but never in all that time "kicked" or showed other untoward behaviour), I've replaced it with another of the same. But I'm wondering if there is some kind of component I can put inline or across the supply, which would safely handle whatever happens when the engine seizes, so it doesn't blow fuses and perhaps even avoids burn out in future.
Is this possible to do safely? If so, what would one use?