[RE-wrenches] SMA Arc-Fault

[Dave Tedeyan]

Daryl,
That is what I thought at first. Very rare, but I suppose not impossible
that I
would have two inverters with bad arc fault detectors. But since we are
still
getting arc faults after replacing the inverters, I am thinking that it
must be
something else.

Cheers,
Dave


*--*


*Dave Tedeyan*
*Project Engineer*

*Taitem Engineering, PC*
109 S. Albany Street, Ithaca, NY 14850
Voice: (607) 277-1118 x121
www.taitem.com

On Thu, Nov 10, 2016 at 1:18 PM, <penobscotsolar at midmaine.com> wrote:

> There is at least one company (nameless at this point, but not SMA) that
> has been providing replacements for swapping out faulty arc fault
> detectors in their inverters. Could it be possible you have a bad
> detector?
>
> Daryl
>
>
>
> > 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
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