Alan Arrison via EV wrote:
If the fuse doesn't list a DC rating then don't use it with DC.
That's good advice if you're buying something new, or selling products
that have to meet specs.
However, in many cases the only difference between a fuse with AC only
and AC/DC ratings is that they didn't test it on DC because the intended
customer didn't ask for it.
If you ask the fuse's manufacturer, they often *will* have DC test data;
but didn't bother to include it in their UL listing because it would
have cost extra to have UL verify it.
As a rule, an AC rated fuse can safely be used on DC at 1/4th of its AC
voltage rating. So in Jay Summet's case, his 600vac fuse is OK at 150vdc.
On 1/7/2016 8:50 PM, Jay Summet via EV wrote:
I have obtained a surplus fuse, new old stock.
Buss JKS 400
Bussman Limitron
Quick-Acting
Current-Limiting
FUSE
JKS 400
Class J Fuse
Interrupting Rating
200,000 amp. rms sym.
600v or less A.C.
--
Knowledge is better than belief. Belief is when someone else does
your thinking. -- anonymous
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
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