Mayimbe
Senior Member
- Location
- Horsham, UK
No, not the only reason.
Ok. Its the only reason that stipulates the physic dimention of the transformer. The cooling medium is just another adventage that the oil has over the air, but it doesnt stipulate the clearances neither the size of the transformer. Last time I checked.
For example, if I build a Oil Natural transformer, and I found out that, with the amount of oil and the dimention of the transformer that I got, I have this:
1. All clearances are fine, the oil is fine. No chance of failure with partial discharges. Everything OK.
2. Temperature reach an unwanted value. A bit higher than normal.
I will turn that ON into an OF, and problem resolved. I wont change the whole transformer because of the cooling medium. Neither the clearances. And ultimately, neither the dimentions of the transformer.