[RE-wrenches] TL inverter with long DC Feeder

[Jerry Shafer]

Any time we do a ground array, at the array location we combine the strings
and have a disconnect and it has come in handy to
On Oct 6, 2014 10:41 AM, "Mark Westbrock" <westbrock at positiveenergysolar.com>
wrote:

> If you don't want to combine strings at the array, then I would use a
> Square D HU361 for each string.  It is a lot of hardware, but not too
> expensive and very straightforward for a lay person to shut off without
> risk.
>
> Cheers,
>
> Mark
>
> ----
> *Mark Westbrock*
> Field Manager & Employee-Owner
> NM EE98J Journeyman Electrician
> NABCEP Certified PV Installation Professional
> NABCEP Certified PV Technical Sales
>
>
> <http://positiveenergysolar.com/>
>
> Positive Energy, Inc.
> 510 S. Main St.
> Las Cruces, NM 88001
> office: 575-524-2030
> cell: 575-640-2432
> mw at positiveenergysolar.com <westbrock at positiveenergysolar.com>
> www.positiveenergysolar.com
>
>
>
>   <http://www.nabcep.org/installer-locator?state=NM>
> <http://www.nabcep.org/installer-locator?state=NM>
> <http://www.solarreviews.com/installers/positive-energy-solar/>
> <http://www.bcorporation.net/>
>
> On Mon, Oct 6, 2014 at 1:13 PM, All Solar, Inc. <allsolar at scswifi.net>
> wrote:
>
>> How about the Midnite Solar four pole disconnect?
>> Can't remember the model number but recently installed one on a two
>> string TL input circuit. They are made for disconnecting both positive and
>> negative.
>>
>> Jeremy Rodriguez,
>> President
>>
>> All Solar, Inc.
>> 1463 M
>> Penrose Colorado 81240
>> 719-372-3808 office
>> 719-372-3804 fax
>> www.asolarelectric.com
>>
>> Sent by Jeremy's iPhone. Sorry for typos and shorthand!
>>
>> On Oct 6, 2014, at 12:40 PM, "William Miller" <william at millersolar.com>
>> wrote:
>>
>> Wrenches:
>>
>>
>>
>> We are getting up to speed on using transformer-less inverters.  I have
>> advocated long for the additional safety offered by these inverters but I
>> am realizing the trade-offs with the new technology:  The implementation
>> gets more complicated with the requirement for PV wire, OCPD and
>> disconnecting means for plus and minus and plus providing  Arc Flash rated
>> equipment.
>>
>>
>>
>> I am currently designing a system that will locate the PV about 400 feet
>> from the residence.  The system will utilize 2 Solectria 5200 watt
>> inverters at the residence.  I would like to provide disconnecting means
>> for the 4 strings at the array, in case of any needed service or
>> excavating.  Preferably I’d like the disconnecting means to be deployable
>> by a lay person (i.e. the gardener).
>>
>>
>>
>> Finding an 8 pole, arc flash, 600 VDC rated disconnect is not easy.  I
>> could install an Outback 8 circuit combiner with 8 touch-safe fuse
>> holders.  The new combiners have had dead-fronts for a while now.  The
>> gardener needs only to have a Philips screw driver to open this cover.  Any
>> better ideas out there?
>>
>>
>>
>> Thanks,
>>
>>
>>
>> William
>>
>>
>>
>>
>>
>> <image002.jpg>
>> Lic 773985
>> millersolar.com <http://www.millersolar.com/>
>> 805-438-5600
>>
>>
>>
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