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Re: fuse for AEEC 2kw variac?



Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>" <davep-at-quik-dot-com>

Tesla list wrote:

> Original poster: "Laurence Davis by way of Terry Fritz
><twftesla-at-qwest-dot-net>" <meknar-at-hotmail-dot-com>
 
> i blew out the fuse on the AEEC variac. (i got it on ebay recently)
> its aeec 2190 (i think, could be wrong.) rated at 2kw with voltmeter.
 
> the fuse appears to be a 5x20mm 250vac/20a.  i cannot find it anywhere.

	Supplier of odd parts, via websearch?
	(I haven't one in mind...)

> about to pull the socket out and replace with 1/4" x 1 1/4" socket.
> I'm not sure, but I think its a slow/medium blow fuse. the fuse is
> not ceramic. Some slow blow fuses have the fuse wire wrapped around
> a fiberglass rod (im guessing), which the fuse isn't either.

	In an application like this I'd use SB regardless.
	cf previous discussions re nuisance blowing of fuses
	in variacs, due to the turn on surge.  (been there,
	done that...).  20A is a bit large, but OK, i think.

	Be Sure the fuse os rated for 125v (or, likely 250V).

	(on occasion, 'LV' (32v, 12v) fuses show up.  Not
	recommended for 110/120 vac work.)

	Might consider use of a 20A circuit breaker, slow blow.
	(Breakers, as fuses, come in normal, fast, slow...) 

	Fuse is simplest...

> any help would be appreciated.
> tnx.  larry.

	best
	dwp