Re: [RE-wrenches] Rooftop DC disconnects

[Allan Sindelar]

Larry, What relay have you found that can handle battery/inverter current levels and would have a DC coil that could run off of the Classic's Aux? Even MDI's mercury contactors only go up to 100A. Thanks, Allan   Allan Sindelar al...@sindelarsolar.com NABCEP Certified PV Installation Professional NABCEP Certified Technical Sales Professional New Mexico EE98J Journeyman Electrician Founder (Retired), Positive Energy, Inc. 505 780-2738 cell   On 9/26/2015 4:49 PM, Starlight Solar Power Systems wrote: Hello Howie, I attached it to my email on 9-24-2015. In brief, a HV relay disconnects the PV array and optional relay disconnects the battery. Midnite plans to add the arc fault Aux feature. Here it is again: I asked Midnite about using the Aux circuit for control for ground or arc faults. They said this will (should) be added on the next firmware update. This means if an arc fault is detected, the Classic will shut down AND conductors leaving the array would be de-energized by switching off the HV relay. All automatically. A second relay could be connected to the battery for total system shutdown. Should be easy to build a circuit to re-energize everything after a fault. Wouldn't this automatic method be better than waiting for someone to throw a switch to shut things down? You would have to run the low voltage control wire and perhaps put the relays in an enclosure. A disconnect switch could be in series for manual shutdown. What am I missing? On Sep 26, 2015, at 9:20 AM, Howie Michaelson <ho...@suncatchervt.com> wrote: Larry, Could you possibly sketch out a rough schematic for what you are talking about here? It would help me understand your suggestion better. Thanks, Howie Howie Michaelson NABCEP Certified Solar PV Installer™ Catamount Solar Renewable Energy Systems Sales and Service VT Solar Electric Incentive Partner http://www.CatamountSolar.com 802-272-0004 _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org

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