system output honesty [RE-wrenches]

[Bill Brooks]

Bob-O,

I appreciate the honesty of the Trace rep, but I think that is a
conservative number (always good to be conservative). I found that the Trace
SW series had a software flaw in it that was mis-timing zero crossings
(observed on my own 5548). This mis-timing was causing substantial
effeciency reduction. Once the error was corrected, the unit cooled down
substantially and I was able to see efficiencies in the mid-to-upper 80s
using very accurate equipment. All ETL-listed SW series inverters have this
problem and it can only be corrected by going into the tech menu and making
the adjustment.

The new UL-listed units were supposed to solve this problem, but I haven't
had the time to do the detailed testing to prove it. I would agree 120% with
your bullshit comment--we have way too much bullshit in this industry and it
has to stop.

Bill.

> -----Original Message-----
> From: Bob-O Schultze, Electron Connection
> [mailto:econnect at snowcrest.net]
> Sent: Tuesday, September 04, 2001 8:18 AM
> To: RE-wrenches at topica.com
> Subject: RE: system output honesty [RE-wrenches]
>
>
> Bill,
> No so according to my rep at Trace. He states (and I appreciate his
> honesty) that the SW will achieve about 80% in sell mode at 25% of
> it's capacity. I.E., for a SW40XX that would be 1KW selling. Above OR
> below that, that efficiency DROPS.
> The problem, of course, is that the information is available NOWHERE
> either printed or on the web for wrenches to see. That is
> unacceptable. How are we to be honest with the client if the
> manufacturer isn't honest with us. I can forgive warts and problems
> with units so long as the manufacturer is working on solutions. That
> is the way  of things. Deliberately hiding the "bad news", on the
> other hand, is pure bullshit.
> Bob-O
>
>
> >
> >The SW is definitely more efficient than 65% for most situations. A good
> >average number in sell back is 85% (a far cry from the 95% value in the
> >manual for going through a resistor).
>
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>

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