Doug:

1.  2.5 KW heater is definitely so small no decent generator will care.
This is the same as two coffee pots. Unless your "Ship" is a dinghy, it is
liable to have a big enough generator this is not a problem.

2.  Put your heater on one phase, a coffee pot on another phase, and your
lights on the third phase if you want to balance them up a little.

3.  Or split up your heater into three little bitty heaters, and put them on
three breakers on three phases.

I used to design this stuff all the time in another life before PICs, email
me offlist if you need some more info.

P.S.  Why do they call you Sherpa?

-- Lawrence Lile


----- Original Message -----
From: "Douglas Butler" <dbutler@IMETRIX.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Monday, July 30, 2001 8:44 AM
Subject: [EE]: 3 Phase Power distribution


> I am wiring an industrial trailer to contain equipment, which contains
> several PICs ;-)
> The raw power for the trailer is 440VAC 3 phase from shipboard
> generators.  I intend to use a 440V(delta) to 208V(wye) 3 phase
> transformer for isolation, to supply a little needed 3 phase power and
> 120V(phase voltage) for lights, computers, coffee pot etc.  One of my
> biggest loads will be baseboard heating (2.5kW).
> How can I wire the baseboard heat so as to maintain a balanced 3 phase
> load, or is 2.5kW so small no decent generator will care?
>
> Douglas Butler (aka Sherpa Doug)
> Senior Engineer
> Imetrix Inc.
> 1235 Route 28A
> P.O. Box 152
> Cataumet, MA 02534-0152
> tel. (508) 564-6460
> Fax (508) 564-6860
> dbutler@imetrix.com
>
> --
> http://www.piclist.com hint: To leave the PICList
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>
>

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