Dave. We have many TL-22 in the field and they will detect faults even when they are normal contactor faults, have you made sure the SW is the latest, last I checked it is 2.65.3R and it may have a patch in there, you can turn off the feature for testing only and see if you melt something down but if you do please be on site as a arc may happen. Do you have a well, AC system with contacts, welders, compressors, anything that has a dry contacts that brakes under load, this is another place I would look. Every time we have had a code out it was real weather from something normal or a wire issue. Not to brag but we have hundreds in the field from the 3's to the 24's and as much as I dread getting a call with this issue I can usually find the problem and it can be either AC or DC. Jerry
On Thu, Nov 10, 2016 at 8:14 AM, Dave Tedeyan <[email protected]> wrote: > Hi All, > > Maybe someone will have some ideas for why a couple inverters keep arc > faulting: > > -There are two SB7000TL-22 inverters, Sunpower branded. > -3 Strings of 7 SPR-327's to each inverter. Kept separate until the > inverter. > -Ground mount about 50' from the shed where the inverters are located > (indoors) > -Simple grid connected system, no batteries. > -There is a whole house generator co-located in the shed. > -We interconnect by using piercing taps on the line side of the generator > transfer switch > -There has been only one power outage there since the system was installed > in April, but the generator fires up weekly. > > -The arc faults have been happening on both inverters. Sometimes only one > at a time, sometimes both will go within a day of each other. > -The events have been approximately one a month, but sometimes more, > sometimes less. > > -We have already checked every single connection in the system twice, by > two different people. > -We have replaced the underground wires (and they looked just fine) > -We have replaced all home runs. > -We have replaced both inverters. > -Arc faults are still happening. > -Arc faults are not always on the same day/time of the week. > > I am wondering if this can be caused by the generator? > Has anyone run into a situation like this or something similar? > > Thanks for your help, > Dave > > *--* > > > *Dave Tedeyan* > *Project Engineer* > > *Taitem Engineering, PC* > 109 S. Albany Street, Ithaca, NY 14850 > Voice: (607) 277-1118 x121 > www.taitem.com > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: http://www.mail-archive.com/[email protected]. > 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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