OIL-IMMERSED ELECTRICAL APPARATUS

PROBLEM TO BE SOLVED: To reduce structural strength of an oil-immersed transformer tank. SOLUTION: By using elasticity of a bag body 9, made of rubber provided with opening parts 11 and 12, a transformer body 13, a board 17, and a suspension rod 18 are accommodated in bag body 9, the opening parts 11 and 12 are suspended at interconnecting openings 5 and 6 of a cover plate 4, and the transformer body 13 is suspended at the cover plate 4 by a suspension mechanism 21. An oil-immersed transformer 1 is configured through steps, where in a state that the transformer body 13 is not accommodated in a tank 2, the interior of the bag body 9 is evacuated via a coupling member 27 and injection of insulating oil 30 into the bag body 9 is conducted. Next, the bag body 9, that accommodates the transformer body 13 and the insulating oil 30 or the like, is accommodated in a tank part 3, and then a tank 2 is formed. Thus since the evacuation is performed only in the bag body 9, the tank 2 will not require a structure which has vacuum resistance strength.