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daverepair
02-22-2012, 04:46 PM
I have just recieved a Hobart TF 300HF and it has the power factor correction Caps in it.I have not set up my power feed to this unit yet and was wondering what these capacitors due, do they lower the input amps for any given setting.

Rick V
02-22-2012, 05:21 PM
In general, on a transformer-based welding machine these capacitors help cancel out the inductive reactance of the transformer winding with the result that:
a) the welder draws about 20-30%% less power when welding at maximum output amperage, but
b) the welder draws about 400% more power when sitting at idle (not welding).
If you do a search here on power factor capacitors, you should find lot of info.
One person on this site using a Lincoln Idealarc welder installed a switch to 'switch' the power factor capacitors in or out.

Bluewelders
02-22-2012, 06:35 PM
If you are running near the max amps of your service,they will keep the breaker from throwing.

technoid
02-25-2012, 08:23 AM
I have just recieved a Hobart TF 300HF and it has the power factor correction Caps in it.I have not set up my power feed to this unit yet and was wondering what these capacitors due, do they lower the input amps for any given setting.Study Resonance of an electrical circuit. Then you will understand Power factor.

morgaj1
02-25-2012, 11:24 AM
Study Resonance of an electrical circuit. Then you will understand Power factor.

Here is a good article:

http://www.electrotek.com/pfactor.htm

technoid
03-16-2012, 06:07 PM
Here is a good article:

http://www.electrotek.com/pfactor.htmExcellent file! I saved it for future reference.