| 摘要 |
PURPOSE:To increase the size of full equipment transportable, by mounting a pressure release part to a main tank so that the height of pressure release apparatus thereof is lower than the upper part of a conservator and arranging so that insulating oil is kept from leaking out of the conservator when the pressure release apparatus is set in motion. CONSTITUTION:A pressure release apparatus 5 is so formed that a bent part A of a pressure release tube 14 mounted to a main tank 1 is lower than an upper surface C of a conservator 3. An automatic valve 20 is mounted between the conservator 3 and a breather apparatus 9. When a working pressure of this automatic valve 20 is greater than an oil head pressure of head H1 which represent a height difference between the oil level C when the conservator 3 is full and the bent part A of the pressure release tube 14, the automatic valve opens in the direction of suction. And by reducing oil head pressure from the conservator 3 by means of the suction motions of the automatic valve 20 and limiting the insulating oil leakage to a minimum amount, the size of full equipment transportable can be increased. |
