Frigidaire washer [RE-wrenches]

[Ezra Auerbach, Trace Engineering]

Hi all,

The "Trace employee" Joel is referring to is me.  I recall sending an email
on this subject to the list months ago.  To recap, all the SW series (except
the now-discontinued SW2512) have the same max AC output (a.k.a. surge).
The apparent difference, that is to say loads which will start of SW40XX but
not of SW5548, is caused by the amount of voltage sag during surge allowed
by the various models.  The larger, 5.5 kW model does not allow AC voltage
to drop below 117 Vac while the smaller 4 kW models allow a much greater
sag.  The end result is ""soft starting" whereby the motor winds up slowly
from a lower-than-line voltage.  I believe I sent a table of voltage drop at
max AC amps to the list.

Ezra
----- Original Message -----
From: "Joel Davidson" <joeldavidson at earthlink.net>
To: <RE-wrenches at topica.com>
Sent: Tuesday, April 03, 2001 6:32 PM
Subject: Re: Frigidaire washer [RE-wrenches]


> One of my customers insisted on buying an SW5548 and a 120/240VAC
transformer
> because he had mostly 120VAC loads but also "a 240VAC well pump." His
installer
> told him that the SW5548 would not work on the pump, but installed it
anyway per
> the customer's instructions. The customer ended up returning the SW5548
and
> getting an SW4048 and now the well pump works. A Trace employee told me
that the
> SW5548 does not have as much surge capability as the SW4048 because of an
> undocumented voltage sag that Trace knows about.
>
> "Allan Sindelar, Positive Energy, Inc." wrote:
>
> > Wrenches,
> > A customer has asked us if the Frigidaire Gallery series front-loader
(model
> > FWT425RHS) efficient clothes washer works well on SW4024 Trace mod-sine
> > power (I know what I wrote, but it's not really a true sine wave ;-) ).
> > The only experience we have had was with a client with a SW5548/dual
> > grid-tied system. In that case, it didn't work, and Tony Boatwright's
> > suggestion of adding a big capacitor didn't help. When the client
switched
> > the washer to the other inverter, the problem went away. So we can't
give
> > her very good advice. Anyone else?
> > Allan @ Positive Energy
> >
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