This range of oil immersed electrical transformers has been specially developed to endure short circuit. Cold rolled silicon steel sheet made core of these transformers improves their functional efficiency. Multi layered cylinder of these transformers has been strengthened by using specially developed winding. Low electrical loss of these electrical transformers reduces their power consumption rate which in turn minimizes their operation charge. Fully insulated metal structure of these transformers is completely corrosion proof. High voltage terminal of these transformers prevents their deformation and minimizes damaging of their cables. Application of these oil immersed type transformers can be noticed in airports, any multi storied structure, industrial buildings etc.