[RE-wrenches] battery box fan

[Darryl Thayer]

HI Larry
I am sorry I misunderstood your query, What you need is a 12 V. coil relay capable of handeling the DC fan current at 48 volts.  I usually go to grainger for these, 12 volt coil (DC) and contact rating of a single pole single throw relay, or a two pole, single throw and wire the contacts in series.  Find the current rating of the Fan and make sure the relay contact rating is greater than this. 
 Darryl


--- On Fri, 11/7/08, Darryl Thayer <daryl_solar at yahoo.com> wrote:

> From: Darryl Thayer <daryl_solar at yahoo.com>
> Subject: Re: [RE-wrenches] battery box fan
> To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
> Date: Friday, November 7, 2008, 6:18 PM
> If your fan is less than 1 amp, like a small computer fan,
> you can power the fan directly, else you have a problem,
> because you have 48 volts and need a 48 volt fan or a
> voltage coverter 48 to 12 volts. Solar converters makes such
> an item aloong with others.
> Darryl 
> 
> 
> --- On Fri, 11/7/08, Larry Brown
> <sunmountain at netstep.net> wrote:
> 
> > From: Larry Brown <sunmountain at netstep.net>
> > Subject: [RE-wrenches] battery box fan
> > To: RE-wrenches at lists.re-wrenches.org
> > Date: Friday, November 7, 2008, 3:29 PM
> > Wrenches.
> > 
> > On an upgrade to an existing system, we just installed
> a
> > Xantrex XW6048 inverter.  We have a 48 volt dc battery
> box
> > vent fan that we used to run through the relay on the
> old
> > SW5548.  The XW6048 has a 12 vdc aux output so I
> assume we
> > need to install a relay to run the fan, 12vdc input,
> that
> > will allow 48 vdc output
> > Any suggestions on what relay to use?
> > 
> > Thanks
> > 
> > Larry Brown
> > Sun Mountain
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