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40A single phase double pole switch fuse.

Have been trying to find a metalclad 40A , or up to 40A switch fused isolator which employs a HRC type fuse element to feed a 6.00mm SWA submain. Had no luck on the web other than something from CEF which I am guessing is a proteus branded item which from past experience I would like to avoid if possible.

All I have found from the usual suspects is a range of switch gear which starts at a 63A rating and rises to 100A max. The problem is that these employ a HRC fuse with a different physical size/form factor in which no 40A rated fuse is available.

Any leads to a potential vendor or brand would be welcome.

0 mapj1 over 2 years ago

May or may not be what you want but fuses from about 5A to 50A are made in size 51mm long *14mm diameter - aka "14 by 51" with 80kA rupture. PSSC There are DIN rail holders for such fuses by Lewden, Schneider and others that can perhaps be put in a box with a suitable DP switch.

(the fatter fuses are not made in such a range of lower amperages)

Mike.
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0 broadgage over 2 years ago

Would one of these serve https://www.ebay.co.uk/itm/183047024858.

Rated at up to 100 amps, fuses to fit are available in 40 amp.

Use an item rated at 100 amps, but downrated to only 40 amps gives an extra margin of safety in case qaulity is not first class.
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0 mapj1 over 2 years ago in reply to broadgage

agree, the 58*22mm fuses is another good choice, covering a wide range of currents they go from about 5A to 125A from Eaton for example again 80kA PSSC.

M.

edit RS do the full set pretty much

https://uk.rs-online.com/web/c/fuses-circuit-breakers/fuses/cartridge-fuses/?pn=1&searchTerm=fuse+58mm&applied-dimensions=4294966472&sortBy=Current%20Rating&sortType=ASC
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0 AJJewsbury over 2 years ago

40A 58x22s can be found - e.g. https://www.cef.co.uk/catalogue/products/420768-40a-22mm-x-58mm-gg-hrc-fuse-sold-in-1-s

- Andy.
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0 whjohnson over 2 years ago

Folks,

Many thanks for the leads - I think the most difficult thing will be tracking down the correct physical sized fuse from my local wholesaler.

I'll pick up one of those switchfuses and chase the fuselink afterwards, I don't think CEF can screw up a fuse!

Many thanks once again.
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0 broadgage over 2 years ago

40 amp fuses of the correct dimensions are widely sold on fleabay.
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40A single phase double pole switch fuse.

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