approved disconnects [RE-wrenches]

[Bill Brooks]

Travis,

The hardware in the Trace SW is identical between the ETL and UL listed
versions. The new software revision was released on October 25, 2000 and has
substantial changes in it. This new revision has been tested to meet IEEE
929. Duke Power in North Carolina accepted this explanation to allow the
connection of an SW on their grid.

Bill.


> -----Original Message-----
> From: Travis Creswell, Ozark Solar [mailto:ozsolar at ipa.net]
> Sent: Wednesday, April 04, 2001 5:14 PM
> To: RE-wrenches at topica.com
> Subject: Re: approved disconnects [RE-wrenches]
>
>
> Bill,
>
> My inverter was manufactured sometime before 2000.  Does it still
> meet IEEE?
> Did I hear something about needing to add/replace the firmware to
> meet IEEE
> 929 for older SW's?  I must admit Trace has been of no help. The best they
> could do was tell me to give the utility a copy of the owners manual.
>
> Travis
> ----- Original Message -----
> From: "Bill Brooks" <billbrooks7 at earthlink.net>
> To: <RE-wrenches at topica.com>
> Sent: Wednesday, April 04, 2001 6:33 PM
> Subject: RE: approved disconnects [RE-wrenches]
>
>
> > Travis,
> >
> > Your utility needs to get a copy of the IEEE 929-2000 interconnection
> > standard. UL Standard 1741 tests the inverter and was revised
> to meet the
> > requirements in IEEE 929 on November 7, 2000. All UL-listed units,
> > manufactured after November 7 with the words
> "Utility-Interactive" printed
> > on the listing label, have been tested to the IEEE 929 requirements.
> >
> > The utility engineers who worked with the IEEE 929 standard are the most
> > well respected in their field--this means that any utility that
> refuses to
> > accept this standard are disagreeing with the top utility engineers in
> this
> > field. Once we get down to the facts of this situation, I have not found
> > many utilities that continue to insist on their own way.
> >
> > There is a tremendous body of work that has gone into standardizing
> > interconnection, but most people in our industry and the
> utility industry
> > are unaware of extent of this work.
> >
> > Bill.
>
>
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