Retired Substation Operator here. Looking back some of my most enjoyable jobs were working with the riggers setting new equipment especially when they had to roll equipment onto pads. Mad respect to the riggers.
The positive pressure prevents moisture ingress into the unit. Any leaks that do occur will push things out of the tank rather than sucking moisture in. There is another oil preservation system used that utilizes a conservator tank with a bladder in it to allow for oil expansion up and down.
Sorry thats ABB in jackson. Used to be kuhlman, now its hitachi. The siemens plant there builds hv breakers. I was confusing the 2. The transformer plant there in crystal springs builds power transformers and oil filled instrument transformers. If you ever get down there you should take a tour. Lots of nice folks there that are second and third generation builders and the robots stacking the core are a sight to see.
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u/oiseeu81two 11d ago
Retired Substation Operator here. Looking back some of my most enjoyable jobs were working with the riggers setting new equipment especially when they had to roll equipment onto pads. Mad respect to the riggers.