View Single Post
  #26   Report Post  
Posted to rec.crafts.metalworking
Jon Danniken Jon Danniken is offline
external usenet poster
 
Posts: 118
Default variac question?

"Grant Erwin" wrote:
I'm puzzled. For sure my wall voltage is connected properly. My
output voltage is showing about 95V (the item is in use at present)
with the voltage set a tad above 80%.

I'm not seeing how hooking up the wall voltage to the slider doesn't
get me a stepUP transformer.


It does, but the core and windings aren't designed for that amount of
current, and will saturate. When that occurs, your input is looking at the
DC resistance of the winding instead of the inductive reactance of the core.

Just for fun, hook the AC main across both sides of the variac, use the
neutral as it is, and pull the AC OUT off of the slider, as follows:

http://sound.westhost.com/beg4-3.gif

Do you still have the problem when using that configuration?

Jon