RE: ...another newbie question

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Lau, Gary" <Gary.Lau@xxxxxx>

I use a 120V/15A Variac that used to have breaker tripping problems
whenever I plugged it in, until I added an NTC thermistor.  I don't know
what a CL-60 is, but mine looks like a large black disc capacitor,
Rcold=1.0, Rhot=.015 Ohm.  Works great!  And with my 15/60 with 240uF of
PFC caps, I still pull in excess of 20A on the 140V side of the Variac.

Dennis - was your 20A fuse on the input or output side of the Variac?

Regards, Gary Lau
MA, USA


> Original poster: "Rich" <rdjmgmt@xxxxxxxxxx>
>
> I have the same problem with my 15/30 but the real problem is with the
> Variac and a cure for that is to put a soft start on it. I do have a
> question for the group , because this one has a fuse in it has any one
> ever tried a thermister CL-60 in a Variac.
>
> Rich
> Subject: ...another newbie question
>
> Original poster: otmaskin5@xxxxxxx
>
> Thanks for all the advice on the hazards of indoor coil
> operation.  After hearing from you guys, man am I glad I asked.
>
> I've got another technical question if anyone would care to weigh
> in.  My 4" coil is powered by a 15/60 NST.  It keeps blowing the 20
> amp fuse in my variac.  I think this means the coil needs PFC.  I'm
> pretty sure I know what kind of caps would be right, but I'm having
> trouble determining the proper way (where & how) to hook them up.
> Could one of you help me out this info?
>
> Thanks.  Dennis Hopkinton MA
>