Solid iron core oil-immersed transformer, is a node structure more reasonable, more excellent performance and lower manufactu ring cost, high reliability of power transformer products. Breakthrough products of the traditional plane type structure, with symmetrical three-phase three-dimensional structu re. And because of its magnetic circuit without air gap winding more closely, silicon steel with magnetic direction and the direction of magnetic circuit is completely consistent. three column are arranged in an eauilateral trianale stereoscopic arrangement, athree pathlenath, and the : hortest cut without waste, processing characteristics: therefore it is a use of traditional materials , but the running noise lower, more compact ana efficient energy-saving transformer. In reducing the loss, saving materials onthe performance, fully in line with China's energy conservation policy.