[RE-wrenches] SMA Arc-Fault
frank -bz products
bzp at brick.net
Thu Nov 10 13:32:29 PST 2016
I have found that single point grounding in large complex systems can
solve a lot strange problems. Just a thought.
BZ Products INC.
8801 Gravois Rd.
St.Louis MO 63123 USA
314-644-2490
www.bz-products.net
On 11/10/2016 3:20 PM, Drake wrote:
> Is your array on a large metal roof, or is it where intense radio
> signals could be getting picked up by your racking? Either of these
> conditions could potentially be your problem.
>
> At 01:37 PM 11/10/2016, you wrote:
>> Daryl,Â
>> That is what I thought at first. Very rare, but I suppose not
>> impossible that IÂ
>> 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,Â
>> Dave
>>
>>
>> *--
>>
>> Dave Tedeyan**
>> Project Engineer
>> *
>> *Taitem Engineering, PC
>> *109Â S. Albany Street, Ithaca, NY 14850
>> Voice:Â (607) 277-1118 x121 <??>
>> www.taitem.com <http://www.taitem.com/>
>>
>> On Thu, Nov 10, 2016 at 1:18 PM, <penobscotsolar at midmaine.com
>> <mailto: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 <tel:%28607%29%20277-1118%20x121>
>> > www.taitem.com <http://www.taitem.com>
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