ABSTRACT
The tank of a transformer is a closed structure which is made from steel plates. It behaves like a plate structure. The stress analysis of a transformer structure can be done by mainly two approaches: an analytical method and a numerical method. The transformer has to be designed for a specified seismic acceleration and a wind load. The seismic and wind loads are very important design considerations for bushings, supporting structures of the conservator, and radiators. When an internal fault takes place in an oil-filled transformer, a large volume of decomposed gases may be generated due to arcing. Under these conditions, the tank structure has to withstand a rapid rise of pressure if the pressure relief device does not act immediately. The contact of oil with the outside atmosphere is totally eliminated. The tank is designed to withstand the pressure variations due to changes in the oil volume.
