110kv建立的现有变压器

The utility model provides a high-voltage big-current transformer, relating to technical field of current transformer. The high-voltage big-current transformer comprises an oil box, an expander, an oil storage tank, a porcelain bushing and a transformer body. The transformer body comprises a primary conductor; an insulating material layer is arranged at the outside of the primary conductor; and a secondary winding is arranged at the outside of the insulating material layer. The transformer is characterized in that the primary conductor is the tube with double-D-shaped cross section; the plane sides of the tubes with double-D-shaped cross sections are arranged in parallel and are separated by insulating material; and the tubes with double-D-shaped cross sections are connected in series to be two loops. The high-voltage big-current transformer has the good effects that the primary side of the transformer has two loops; the transformer is simple in structure, small in volume, excellent in performance, safe and convenient to use and low in cost and saves material; the precision of the transformer is improved; and the temperature rise of the transformer is reduced. The transformer is quite suitable to be used as a high-voltage big-current transformer, particularly a 35-500kV erected oil-immersed current transformer