Re: Using 240VAC on 140VAC Varic

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

Original poster: Finn Hammer <f-h-at-c.dk> 

Dan,

It shouldn`t take too long to hook one of the units up with another variac, 
and see if current starts to skyrocket somewhere between 120 and 240 volts.
Best way I know to test for voltage rating.

Cheers, Finn HAmmer

Tesla list wrote:
>Original poster: "Mccauley, Daniel H" <daniel.h.mccauley-at-lmco-dot-com>
>Actually, from what it appears, my 0-240VAC (280VAC) 3-phase variac is
>only rated for 0-140VAC per single
>unit.  I think its wired in such a way that you can use 0-240VAC 3-phase
>on the entire stack, but each single
>variac only sees the phase-to-phase voltage, as opposed to phase to
>neutral.
>Make any sense???
>Dan
>
>
>
>thats strange, i bought one of them,
>480v input, 0-560v out 9.8Amp rating
>on the spec plate.
>same current draw specs as yours on 240v
>but at 320ma i left it on for a while and there
>was no percievable temperature rise in the core
>and i was able to get 272v at the ouput.
>at 0-140v your's must be different to mine.
>i thought the batch he got were all the same.
>regards
>richard
>aus.
>
>----- Original Message -----
>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: <tesla-at-pupman-dot-com>
>Sent: Tuesday, February 10, 2004 11:48 AM
>Subject: RE: Using 240VAC on 140VAC Varic
>
>  > Original poster: "Ian McLean" <ianmm-at-optusnet-dot-com.au>
>  >
>  > Hi Dan,
>  >
>  > Yes.  I bought a variac from Oatley Electronics here in Australia
>that came  > from the U.S.  It was rated for 0-140AC.  It was part of a
>3 phase stack.  > It workes fine up to 2kVA on 240VAC, as long as you do
>not try and use the  > step-up winding.  If you wire it without the
>step-up, the variac draws about  > 30mA without load, which is fine -
>but if you try and use the step-up  > winding, the variac draws about
>320mA, so I suspect the core is saturating.  >  > PS: The variac only
>cost me Aus$40 ;)  >  > Rgs  > Ian.  >  >  > -----Original Message-----
>  >  > From: Tesla list [mailto:tesla-at-pupman-dot-com]  >  > Sent: Tuesday, 10
>February 2004 2:03 am  >  > To: tesla-at-pupman-dot-com  >  > Subject: Using
>240VAC on 140VAC Varic  >  >  >  >  >  > Original poster: "Mccauley,
>Daniel H" <daniel.h.mccauley-at-lmco-dot-com>  >  >  >  > Has anyone tried
>running 240VAC on a variac rated for 0-140VAC ?  >  > I know there are
>issues, but just curious if anyone actually tried it.  >  >  >  > Thanks
>  >  > Dan  >  >  >  >  >  >  >
>