RE: Single vs Two Phase

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "John H. Couture by way of Terry Fritz <twftesla-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>


DWP -

You cannot "throw a scope on the delta". An electrical three phase delta
connection cannot be made to a scope because the reference neutral is needed
which makes the three phase connection a Y connection. The three phase delta
connection is used mostly for motors and transformers.

John Couture

----------------------------------

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Monday, January 07, 2002 8:44 PM
To: tesla-at-pupman-dot-com
Subject: Re: Single vs Two Phase


Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<davep-at-quik-dot-com>

Tesla list wrote:
>
> Original poster: "John H. Couture by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>

> DWP -

> Not correct. The electrical delta system is represented as three vectors
in
> the form of a triangle with three 60 degree angles, not 120 degrees as you
> indicated.

	Delta and wye are both 120 degrees.
	The closed delta in the drawing is basically a graphical short hand.
	cf any text.  Throw a scope on the delta.  (at suitably
	safe voltages...  One can derive a reference neutral
	relatively easily.)

	best
	dwp