ryan wrote:Try an iPhone.
Ok, that *is* big.
Largest one I have held in-hand is an old (unfortunately blown) JKS-250, and though it is bigger than yours it is not by all that much:
I'd guess at 2-3lbs or more for weight, without trying the scale. 600VAC 250A, can interrupt up to 100,000A.
But this isn't helpful to the discussion at hand...sorry.
I only bring it up because I have considered opening it up and rewiring it using thin solder or the like, since in a dead short at least I know that would melt before the rest of the system caught fire or something, if I had a really huge battery setup on a bike or whatever. I believe it uses sand or similar inside, so that during an extreme event it melts the sand into glass to close the current path.
bigmoose wrote:We ought to see what fuses the big Sevcons use that are rated up around 115 V. Might pick up some cost effective ideas.
I found a number of "Sevcon fuses" in a search, but am not sure which ones would be useful to us. Very few have pictures or useful information. Prices vary a lot, too.
Sevcons like this one:http://www.electricmotordepot.com/sevco ... 0v-350amp/
are using a fuse I don't know the type name for, but it is visible on the controller as the white "bar" with end tabs below:
I assume it would be rated over 100VDC / 350A as the Sevcon itself is.
I have smaller versions of these fuses, labelled as "mega fuse", from huge APC UPS's external battery packs and from powerchairs (both of which also used SB50 Andersons, oddly enough). Mine are rated at 100A, and probably 24-48V at a guess, but I can't remember just now, and don't have them handy to check. Been considering digging them out for installation into my packs on the bike, but all the tuits I have here are non-circular.