Re: (ET) Replacing main disconnect

["RJ Kanary" <rjkanary nauticom net>]

Here are three URLs to get you started. This is apparently a little known 
occurance with lead acid batteries. Those that have witnessed it, however, 
can attest to it's existance. I know that I can!     :(





http://www.ext.nodak.edu/extpubs/ageng/safety/ae1022w.htm



             91.. http://jschandbook.jsc.nasa.gov/JPG1700-1ch6-1.doc
             92..
             [Microsoft Word]
             This could be you . . . A sealed metal box containing a lead 
acid battery exploded and fatally injured a technician. Sparks from open 
electrical contacts in the box ignited the hydrogen released by charging and 
discharging the battery. ... 20793, "Manned Space Vehicle Battery Safety 
Handbook." All spaceflight battery uses must ...
             jschandbook.jsc.nasa.gov/JPG1700-1ch6-1.doc

             http://www.rayvaughan.com/battery_safety.htm


----- Original Message ----- 
From: "David Roden (Akron OH USA)" <roden ald net>
To: "Elec-trak list" <elec-trak cosmos phy tufts edu>
Sent: Saturday, September 18, 2004 2:13 AM
Subject: Re: (ET) Replacing main disconnect


> On 16 Sep 2004 at 23:18, RJ Kanary wrote:
>
> > 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.
>
> Interesting.  Perhaps I've missed something - besides extreme 
> overdischarge
> situations, when a cell is reversed, when do lead acid batteries produce
> explosive gases on discharge? Are you speaking of hydrogen, or some other
> explosive gas?  If some other, what process causes this evolution?
>
> Thanks,
>
>
> David Roden - Akron, Ohio, USA
> 1991 Solectria Force 144vac
> 1991 Ford Escort Green/EV 128vdc
> 1970 GE Elec-trak E15 36vdc
> 1974 Avco New Idea 36vdc
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>
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