It's an old PFC cap. It's got 3 separate .22uF capacitors in it, and it was supposed to be on a 14.4kV line. Given that, the Bil rating of the cap is ~200kV. It truly is a monster!!! these are actually not too hard to find, a local electronics guru set me up with mine.
Actually to achieve 7200V i ran the full low voltage secondary at 120V ~50A. Also, the calculated resonant capacitance for this power source is ~.25 uF so this capacitance is near optimal. At 14.4kV same power, the resonant cap would be ~.125uF.
This transformer is designed to be powered from a 14.4kV source, when running it backward the super low impedance LV winding will literally short the 240/120V supply. The LV winding is estimated to only be 2-3 ohms at 60 Hz!!
I added an inductor to raise the impedance by 10-20 ohms. When this happens the amount of power the 240V winding can draw drops dramatically. Also note that I was running 120V through the 240V winding. In later videos I ran the pig at full 240V and I was reaching 15-20kW.
how much did that cap cost, and i can tell by the sound and when the arc goes out you not quite resonant yet.
ubuntupokemoninc 1 year ago
What kind of monster capacitor did you use that can stand that sort of voltage/current?!
Andyman3k 3 years ago
It's an old PFC cap. It's got 3 separate .22uF capacitors in it, and it was supposed to be on a 14.4kV line. Given that, the Bil rating of the cap is ~200kV. It truly is a monster!!! these are actually not too hard to find, a local electronics guru set me up with mine.
kolas01 3 years ago
so its running off of 240v at 30A right?
hvhaxor 3 years ago
Actually to achieve 7200V i ran the full low voltage secondary at 120V ~50A. Also, the calculated resonant capacitance for this power source is ~.25 uF so this capacitance is near optimal. At 14.4kV same power, the resonant cap would be ~.125uF.
kolas01 3 years ago
why did you run this at such low power,
hvhaxor 3 years ago
This transformer is designed to be powered from a 14.4kV source, when running it backward the super low impedance LV winding will literally short the 240/120V supply. The LV winding is estimated to only be 2-3 ohms at 60 Hz!!
I added an inductor to raise the impedance by 10-20 ohms. When this happens the amount of power the 240V winding can draw drops dramatically. Also note that I was running 120V through the 240V winding. In later videos I ran the pig at full 240V and I was reaching 15-20kW.
kolas01 3 years ago
so basically u added a ballast
hvhaxor 3 years ago
you need more like 2 or 3 uf i would say buy alota mo caps to get a res circut
hvhaxor 4 years ago
you need more like 2 or 3 uf i would say buy alota mo caps to get a res circut
hvhaxor 4 years ago
holy hell, i'd say the capacitor helped it a little! a lot is more like it. I need to get me one of thoes so i can build a big tesla coil
drewhastheinternet 4 years ago
Buy mine :)
50kw good enough for ya?
triggerhappy77707 3 years ago
@triggerhappy77707
sure i'll buy yours how much?
ubuntupokemoninc 1 year ago
@ubuntupokemoninc Well it can't be shipped, so i don't think it'd be practical for you to buy it. BTW i am Arcstarter on 4hv.org if you didn't know.
triggerhappy77707 1 year ago
@triggerhappy77707
My dad makes trips down to the Florida area every once and a while could he pick it up? how much would you sell it for?
ubuntupokemoninc 1 year ago
Wow amazing arc.
jmartis2 4 years ago
My first YouTube video... and its not even really mine :-( (I was the one recording)
tiger7577 4 years ago