John Erickson wrote:
Gents,
Thanks for all the help with the master disconnect switch. The summary is that the switch needs to be rated (at least intermittently) to 1,000 amps.
Another good source is Pollak Engineering. There web site is http://www.pollakaftermarket.com Part number 51-315 looks just about right. They also have keyed versions available.
All this research comes back to our club winch trailer. We were initially thinking about a bus system for our winch and retriever, 4 batteries in parallel with disconnects at each battery so any combo of batteries could be used at one time. In this scenario we would have adjacent charging terminals so the equipment operator just rolls the trailer into the garage, flips the switch on to the battery that needs charging and hooks up the charger.
We were going to separate the positive and negative bus by the plywood deck and have everything insulated but it looks just too dangerous with that much stored power. We are now going back to a scaled down version with individually switched batteries. We'll still have 4 on the trailer so we shouldn't ever need a field charge after a long session of flying.
I'm looking for the simplest, cleanest wiring solution that doesn't involve
changing any terminal connect on the batteries (they're in cases), and
provides for simple, accessible charging. Any and all suggestions are
welcome!
JE -- Erickson Architects John R. Erickson, AIA
From: "Andrew E. Mileski" <[EMAIL PROTECTED]> Date: Thu, 11 Dec 2003 01:40:24 -0500 To: [EMAIL PROTECTED] Subject: Re: [RCSE] Switch capacity
[EMAIL PROTECTED] wrote:
You should be good with a rating of 400A or better. I
haven't bought any for a couple of years, but JC Whitney used to have
such for ~$20.
Search on "master cutoff" or "cole hersee": http://www.jcwhitney.com/webapp/wcs/stores/servlet/ProductDisplay?productId=10 27&catalogId=10101&langId=-1&storeId=10101
The Cole Hersee site is: http://www.colehersee.com/ The one we want is: 75908 300 Amps continuous/2000 Amps intermittent (30s on 3m off) all the others are rated for half as much or less.
--
Andrew E. Mileski
Ottawa, Canada
http://isoar.ca/
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