Re: (ET) Replacing main disconnect

["RJ Kanary" <rjkanary nauticom net>]

Hopefully the fuse can totally contain the ALL  results of a fault opening . 
Having sparks and high temperature gasses present near lead acid batteries, 
{That do evolve explosive gases during DIScharge, also.}may not be the best 
idea in the world.
        Again, we are faced with the fact that original engineers had some 
darn good reasons for doing many of the things that they did. <G> Fuse link 
INSIDE the control cabinet, AWAY from the power pack. I wonder WHY they did 
that ? <VGB>


----- Original Message ----- 
From: "Chris Zach" <czach computer org>
Cc: "Elec-trak list" <elec-trak cosmos phy tufts edu>
Sent: Thursday, September 16, 2004 11:09 PM
Subject: Re: (ET) Replacing main disconnect


> Ok. So putting a 200amp 10,000 volt AIR DC rated fuse (say one from a 
> large APC UPS) will do the trick. That works; most of those are rated for 
> 48 volts anyway.
>
> I'll sit down over the weekend and figure out how to implement such a 
> beast. I suppose one could put the fuse in between the battery pack's 
> individual batteries (say between 1 and 2), however if anything goes to 
> ground you could have part of the pack bypass the fuse. Thus it would have 
> to go into the last battery connection itself.
>
> Hm.
>
> Chris
>
>
> RJ Kanary wrote:
>
> >     It takes a sustained 200A load to vaporize the OEM fuse link.
> > The switch kit that Tech Parts formerly sold retained the fuse link by 
> > providing a piece of plastic with the switch to mount it on . As soon as 
> > my server is restored after a domain hijacking incident, I will scan and 
> > post the instructions that Bill had provided.
>
>
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