[RE-wrenches] automatic DC switch

[Wind-sun.com]

You could try one of these types, but our experience with switching high 
voltage DC has not been good. Even in DC lines you can get spikes, which 
take out the relay. I have seen 600 VDC ones die on 250 volt DC lines.

I would suggest he run a high voltage DC supply from the AC mains.

http://www.teledynerelays.com/industrial/s60dc40.asp

..................................................................................................
Northern Arizona Wind & Sun - Electricity From The Sun

----- Original Message ----- 
From: "Darryl Thayer" <daryl_solar at yahoo.com>
To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
Sent: Friday, January 23, 2009 4:05 PM
Subject: Re: [RE-wrenches] automatic DC switch


> It seems to me this is a job for a solid state relay.  But I have never 
> had to do 500 VDC if it were AC it would be fine.
>
> Can you shut off the inverter reducing the DC to no load switching?
> The frequency is also important.
> Darryl
>
>
> --- On Fri, 1/23/09, Dana Brandt <dana at ecotechenergy.com> wrote:
>
>> From: Dana Brandt <dana at ecotechenergy.com>
>> Subject: [RE-wrenches] automatic DC switch
>> To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
>> Date: Friday, January 23, 2009, 1:42 PM
>> Hi Wrenches,
>>
>> I have a quirky project where I need to toggle PV DC
>> between grid-tie
>> inverters and an electrolyzer for a fuel cell system. Does
>> anyone know of a
>> good product to switch 10A, 500VDC? It needs to be
>> controlled remotely and I
>> need to switch 24 seperate circuits.
>>
>> Thanks a lot!
>>
>> Dana
>>
>> -- 
>> Dana Brandt
>> Ecotech Energy Systems, LLC
>> www.ecotechenergy.com
>> dana at ecotechenergy.com
>> 360.510.0433
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