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Subject: Re: [Amps] 3 PHASE TO 1 PHASE REWIND
From: "Will Matney" <>
Date: Wed, 29 Jun 2005 15:33:12 -0500
List-post: <>

You can wind it that way but the losses shoot up pretty good. The primary would 
have to be put on the center leg. You may want to just wind one big coil and 
mount it on the center leg (core) as the windows are wide in a 3 phase core. 
That would give the most efficient design. Also, the standard transformer 
equations work the same by how much area in sq. inches is in the cores cross 
section, the type of steel for the max. flux density, and the laminate 
thickness for the stacking factor. A 3 phase cores outside legs are the same 
thickness as the center leg or core. The windows are about X2 as wide than in a 
single phase type core. By this a thicker coil can be wound than on a single 



----- Original Message -----
From: "Doug Waller" <>
Subject: [Amps] 3 PHASE TO 1 PHASE REWIND
Date: Tue, 28 Jun 2005 15:04:31 -0400

> Gentlemen:
> I have the opportunity to obtain a 15kva, 3 phase power 
> transformer, which I wish to rewind as a single phase HV plate 
> transformer.
> I tentatively plan to wind the primary on one core, and two 
> secondary windings, one on each of the remaining two cores, and 
> connected in series.
> Any experiences with such, or any advice would be appreciated.  I 
> want to rewind one big power transformer in my ham career before I 
> call it quits.
> All comments welcome.
> 73/DX, om Doug / NX4D
> _______________________________________________
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