Nathan, The only explanation the electrical distributor provided is seen below. They are really skirting a thorough explanation... The distributor engineer does not view the inverters as a negative load, and states they will exceed the 500A fault current limit the site is designed for. Thanks, Karl
From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Nathan Charles Sent: Thursday, March 27, 2014 2:03 PM To: RE-wrenches Subject: Re: [RE-wrenches] Fault Current Karl, Can you give us some more details on their concerns? I've done some very large single phase ag installs and the only time I've had issues is when we exceed the 80% of minimum load on the medium voltage feeder. Best, -N On Thu, Mar 27, 2014 at 2:51 PM, Karl Jaeger <kjae...@lightwavesolar.com<mailto:kjae...@lightwavesolar.com>> wrote: Dave, We are about as rural as we can get here.... farm land. Very good document, nonetheless. Karl From: re-wrenches-boun...@lists.re-wrenches.org<mailto:re-wrenches-boun...@lists.re-wrenches.org> [mailto:re-wrenches-boun...@lists.re-wrenches.org<mailto:re-wrenches-boun...@lists.re-wrenches.org>] On Behalf Of Dave Click Sent: Thursday, March 27, 2014 1:29 PM To: re-wrenches@lists.re-wrenches.org<mailto:re-wrenches@lists.re-wrenches.org> Subject: Re: [RE-wrenches] Fault Current Karl, you're interconnecting into a spot/area network, right? It's a real concern; some solutions and background on the issue here: http://www.nrel.gov/docs/fy09osti/45061.pdf DKC On 2014/3/27, 14:05, Karl Jaeger wrote: Esteemed Wrenches, We've recently run into an issue with a local distributor citing network fault current on a split-phase service as a reason to prevent interconnection of our customer's solar array. They've given us the options of reducing our system size from 36.5kW-DC to 15kW-DC, or having the customer upgrade to 3-phase at a soft price of $20-30K. We're looking at 32kW of inverters on a 167kVA transformer. Does anyone have experience on circumventing the issue of network fault current? Any experience with Fault Current Limiters? Much appreciated, Karl Jaeger Design/Build Engineer LightWave Solar Electric LLC _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org<mailto:RE-wrenches@lists.re-wrenches.org> Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm<http://www.re-wrenches.org/etiquette.htm> Check out participant bios: www.members.re-wrenches.org<http://www.members.re-wrenches.org> _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org<mailto:RE-wrenches@lists.re-wrenches.org> Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm<http://www.re-wrenches.org/etiquette.htm> Check out participant bios: www.members.re-wrenches.org<http://www.members.re-wrenches.org> -- Nathan Charles Engineer NABCEP Certified PV Installation Professional #042013-20 Paradise Energy Solutions (717) 283-2021 direct
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