| 摘要 |
PURPOSE:To suppress the pressure rise in tanks by a method wherein a gas space of a prescribed size, isolated from insulating oil by an insulating diaphragm, is provided to the upper part of a lead duct. CONSTITUTION:Insulating oil 1 in tanks 3 is circulated smoothly in the lower part of a lead duct 5a through each tank 3 and each connection part 9. The upper part of the duct 5a is isolated by an insulating diaphragm 6a from insulating oil circulating in the duct 5a to compose a gas space 7a of a prescribed size. With this constitution, not only expansion and contraction of the insulation oil 1 in the tanks 3 is absorbed, but also, when the pressure in the tank 3 rises due to the accident in the tanks 3, the inslation oil 1 flows into the duct 5a easily through each connection part 9 and absorbed by the gas space 7a isolated by the diaphragm 6a. |
