[RE-wrenches] Relay for excess PV/ AC coupling

[James Jefferson Jarvis]

600 VDC rated contacts on a relay is going to be expensive. Extinguishing a DC arc at 600 volts needs a vacuum and/or rather substantial arc breakers. 

You didn't mention current... but I would ball park a relay like what you describe in the multiple hundreds of dollars. Perhaps changing the system design (two inverters? Micro inverters?) would be more cost effective. Switching AC is relatively cheap and very easy. DC is not.

-James Jefferson Jarvis
APRS World, LLC
http://www.aprsworld.com
+1-507-454-2727

(this message was sent from my cell phone ... my apologies for any spelling errors)

"All Solar, Inc." <allsolar at scswifi.net> wrote:

>Wrenches,
>I have been searching here with little luck.
>I am in need of a relay.  Ideally, 120vac coil with 600vdc rated contacts.  I am trying to limit the input to a GT inverter an AC coupled sysetm. We need to drop off two strings to the inverter when the grid is down, thus limiting the output of the inverter. 
>
>P.S. Dave, I know you are looking into this when you are done traveling!
>
>Thanks in advance
>
>Jeremy
>
>All Solar, Inc.
>CO, USA
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