power transformer is one of the main equipments in power plants and substations. The role of the transformer is various, not only can raise the voltage to send electrical energy to the area of use, but also to reduce the voltage for all levels of use. In order to meet the needs of electricity, the high-grade oil-immersed distribution transformer exporters, usually good dry-type power transformer factory cooperation, the power transformer will play a role to the maximum, Chinese exporters like foreign buyers of domestic power transformers