GAS SEPARATOR OF OIL-IMMERSED MACHINERY

PURPOSE:To enhance reliability, by mounting gas collecting containers to a plurality of opening/closing values mounted to a gas sump. chamber through joints in a detachable manner and making it possible to measure the concn. of transmitted gas plural times. CONSTITUTION:The content of oil-immersed machinery is received in the container of the oil-immersed machinery and insulating oil 2 is sealed in the container 1 and a flange value 3 is mounted to said container 1 while a gas permeable material 6 is mounted to the leading end of said flange value 3 in an oil-tight manner. Next, gas collecting containers 121, 122, 123 are mounted to the leading ends of the opening/closing valves 91, 92, 93 mounted to the gas sump. chamber 7 through detechable joints 101, 102, 103. The opening/closing valves 91-93, 111-113 are closed after the gas in oil and a gaseous phase side reached an equilibrium state to release joints 101-103 and the gas sump chamber 7 is separated from the gas collecting containers 121-123 and gas is guided to a gas sensor to measure the concn. of the gas. The concn. of the gas can be measured up to three times and reliability can be enhanced.