| 摘要 |
PURPOSE:To prevent the application of excessive pressure to the oil-immersed electrical machinery and apparatus by forcedly circulating a section between an electrical machinery and apparatus proper and a conservator and a section between the conservator and a cooler separately while setting up motor valves to the outlet and inlet of the conservator and closing the motor valves on stopping. CONSTITUTION:The conservator 9 is installed between the oil-immersed electrical machinery and apparatus 1 set up under the ground and the cooler 8. An oil pump 10 and oil pipings 12, 13 are installed between the electrical machinery and apparatus 1 and the conservator 9, and an oil pump 11 and oil pipings 14 are set up between the conservator 9 and the cooler 8. The motor valves 15 are set up to the outlet and inlet of the conservator 9 of the oil pipings 14. Accordingly, only head pressure by the height of an oil surface of the conservator 9 is made contain as oil pressure applied to the electrical machinery and apparatus. When stopping the cooler, the volume of the conservator 9 need not be increased because the motor 15 are closed and the oil pump 11 is stopped. |
