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Re: Single vs Two Phase
Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>" <davep-at-quik-dot-com>
Sure you can.
Differential probes, or single ended probes and a diff plug in,
or, a two channel plug in, or front end, in differential mode.
(OK: Need 4 channels, to make a 2 diff channels that way....)
diff mode, however derived, is REAL HANDY for other purposes
around high 'noise' fields..)
Tesla list wrote:
> Original poster: "John H. Couture by way of Terry Fritz
> 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>"
> 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
> > 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.)