I have a 1850 KVA single-phase, ungrounded transformer without ground-detection installed. It has a 4000 Amp resistive load attached and uses a saturable core reactor to control output current. It feeds two large electrodes that pass through a grounded metallic plate. The voltage is fairly low 300-800 VAC. There are occasions when I see significant arcing from one electrode to the metallic plate, never both electrodes at once. I am pretending like I know that there are no other direct conductive paths to the "non-arcing" electrode. Is it concievable that there might be some inductive effect that results in this arcing. The air gap is at least an inch, the penetration is round, the amps =3000 and the volts ~ 600VAC.
Ungrounded Transformer Arcing
- Thread starter zeit
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petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- engineer
Re: Ungrounded Transformer Arcing
inductive effects - none that I can think of.
it is possible that the ozone or byproducts generated by the arc are reducing the resistance of the air in the area where you are seeing undesirable arcing.
have you considered blowing fresh air across the area to see if this eliminates the problem? just a thought.
inductive effects - none that I can think of.
it is possible that the ozone or byproducts generated by the arc are reducing the resistance of the air in the area where you are seeing undesirable arcing.
have you considered blowing fresh air across the area to see if this eliminates the problem? just a thought.
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