Fuse replacement

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2 Oct 2016
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Hello

I have a question , when looking at a cartridge fuse that say's , 32A (32SB3) , and at the side it says 550V AC 80kA ( BS88.2 ) , can this be used as a 32A on 240V supply ! .

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That means it can break a fault current of 88kA and work on a 550v supply. In a domestic supply you might not even get 1kA, certainly not tens of kA, so it'll be fine!
Edit of course you still need to meet disconnection times for your downstream circuit, so you'll have to check your zs values still, but that's a separate topic.
 

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