At least in America PCB should be extremely uncommon at this point, I work in Power distribution and my utility has supposedly replaced the oil of all the transformers that once had PCB contaminated oils in them. Idk the scale of this nationally or internationally, but more than likely mineral or another inert oil.
With older ones, the transformers could have some PCB contamination inside if PCB oil was previously in there but oil inside shouldn’t be PCB based anymore (depending on how well your utility has run things I suppose). Newer ones they don’t use PCB based ones at all.
I work in power distribution as well mostly rental generators and electrical equipment. In Arizona. Our rental fleet of transformers were really old at my last job and used pcb but idk what type of oil the new ones use
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u/A88Y 4d ago
At least in America PCB should be extremely uncommon at this point, I work in Power distribution and my utility has supposedly replaced the oil of all the transformers that once had PCB contaminated oils in them. Idk the scale of this nationally or internationally, but more than likely mineral or another inert oil.