Outdoor oil cooled instrument transformers are hermetically sealed type in construction. The whole CTPT unit is dried in an air heating oven under very high vacuum & strictly controlled conditions. Measurement of amount of moisture taken out from the CTsPTs is done at regular intmore...
Convection moves oil through the coil and core assembly ducts and around the coil. In small ratings, the oil is cooled by the tank's exterior, and in more significant ratings, by an air-cooled radiator. Outdoor oil-type transformers can be ground, pad, or pole-mounted. They perfomore...