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Re: Oil Burner transformers



Original poster: David Speck <Dave@xxxxxxxxxxxxxxxx>

J,

You cannot connect three OBITs in series for 30 KV, because the insulation of the outer transformers is unlikely to be able to handle the voltage stresses. However, most OBITs are single ended units, with one end of the HV connected to the case, and the other to a single HV bushing. In that case, you could connect two of the cases together and properly phase two of the transformers for 20 KV at 23 ma. However, if you are planning to make a TC, then 20 KV will require very high voltage rated capacitors. Dr. Resonance recommends a 3 x V RMS rating for the caps, so you would have to build a 60 KV MMC string, which would be expensive.

You would be better off connecting the three OBITs in parallel and phasing them properly for 10 KV at 69 MA. This would be a much easier supply voltage to build a coil around, and should give you some very nice results. If you are using the transformers for a Jacob's Ladder, then you will find that it is the current available, not the voltage, that determines the max spark length. Once the arc is established, the voltage across the discharge is only a few hundred volts. The max length of the discharge is determined by the current supplied, not the voltage. More current makes longer discharges after the arc is established.
Dave

Tesla list wrote:
Original poster: jhowson4@xxxxxxxxxxx

Hello

I just got 3

10KV 23ma  oil burner transformers

I was wondering if it was possible to connect them together to get a total of 30KV if so how would this be done. I could get pics if need be.

Many Thanks