Re: Generator Control- A Doozie [RE-wrenches]
Phil,
I have already worked that one out and the owner really doesn't want to get rid of the ATS. Plus there is some real physical restrictions on the wiring part that I rather not tackle. It could involve trenching very near an underground pool, phone lines, tearing a field stone side walk and all sorts of other really nasties.
BTW, I'm talking about 12 volt control system on gennie. 48 volt inverters. I don't do 12 volt systems in residences.
Want do you think of the line voltage relay on the 2 -wire start system. I think that it is the most simple way to do it but... I'd rather not fiddle with the SW's controlling the generator as I have had less than super results with it on other jobs.
Travis
How about this:
Grid power goes through ATS to the main load center, which has a 2 pole 60A breaker sending power to AC1. Inverters feed a critical load panel. Generator's start circuit is removed from the ATS and wired to the inverters.
Power outages transfer ATS to emergency power position, but cannot start generator. Main load center is not powered, but the inverters feed the critical loads. At a programmed voltage or amperage point, the inverters start the generator, which feeds thru the ATS to the main load panel and therefore AC1 for charging.
Possible problems: too much load on main panel to leave power for charging.
Also, does that ATS sense generator input and executes a time-delay before latching, or does it latch after a time delay from losing grid power? One allows the generator to warm up, the other doesn't. Also, are your inverters in sell mode? could we have the inverters attempting to "sell back" to the generator, and what would that cause?
The inverter should be able to be connected in parallel with the ATS, if you wanted the ATS to govern the excersize cycle, but the inverters can do the same thing with more flexibility.
BTW, why a 12 volt system for a dual SW? The thought of that much current flowing makes me wince. Hope all the wire near your shunt is rated 90 degree Celcius or better.
Travis
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From: Phil Undercuffler <phil@positivenergy.com>
To: RE-wrenches@topica.com
Subject: Re: Generator Control- A Doozie [RE-wrenches]
Date: Mon, Feb 5, 2001, 1:11 PM
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