| 摘要 |
PURPOSE:To control a weight increase of a tank and a weight of an insulating medium to a minimum by fixing a seat where a screw portion for fastening a bolt is formed in a part facing a magnetic shield body on an external wall surface of the tank and by composing the magnetic shield body by fastening after penetrating a bolt through the tank. CONSTITUTION:A magnetic shield plate 4 is arranged in a predetermined part on a wall of a tank 3, and a seat 10 where a screw portion 10 for fastening a bolt is fixed in a part facing the magnetic shield plate 4 on an external wall surface of the tank 3 by such as welding 11. A bolt 7 is provided after penetrating through the tank 3 from an opposed side face of the tank 3 of the magnetic shield plate 4, and this is composed after fastening the bolt 7 in a screw portion 10a of the seat 10. A reinforcing material 6 such as a beam is provided in an external wall side of the tank 3. Therefore, as the tank 3 becomes compact, its weight is reduced, and a weight of an insulating medium such as an insulating oil is also reduced, a total weight can be sharply reduced. |
