JPS55125605A - Antidisaster type transformer - Google Patents

Abstract

PURPOSE:To prevent an accident due to the rise in internal pressure, by providing bushing mounts on the peripheral wall of a cylindrical tank so that the mounts extend in the radial direction and by dividing the space on the surface of oil in the tank, into two portions by a partition plate having a pressure release port. CONSTITUTION:Bushing mounts 5 are provided on the peripheral wall of a tank 1 so that the mounts project in the form of L. Primary bushings 7 are vertically attached to the bushing mounts. Secondary bushings 8 are horizontally attached to other bushing mounts 6 provided on a portion of the peripheral wall. The space on the surface of oil is divided into two chambers by a partition plate 9 so that the upper chamber 10 is used as an oil collection chamber. The partition plate 9 is provided with a pressure release port 12. Oil, which is ejected in pressure release, is stored in the oil collection chamber. A pressure release pipe 13 is a U-shaped pipe and has an oil storage part 14. One end of the pressure release pipe is opened into the oil collection chamber and the other end is equipped with a pressure release valve 16. Even if a large amount of gas is produced in an accident, the bushings 7, 8 are not damaged because the bushing mounts 5, 6 are provided. The gas is conducted into the oil collection chamber through the release port 12 to reduce the pressure of the gas. The gas is conducted out of the tank through the pressure release pipe 13. The pressure release valve 16 is opened to release the gas into the atmosphere. The ejected oil is separated from the gas and then stored in the oil collection chamber 10.