METHOD OF AND APPARATUS FOR DETECTING GAS IN OIL FOR OIL-FILLED EQUIPMENT

PURPOSE:To ensure higher quantitativity even when a gas reservior chamber or a gas quantity detecting tube is negative in the pressure by feeding air into the gas quantity detecting tube communicating to the gas reservior chamber to maintain the normal pressure before the gas quantifying operation. CONSTITUTION:When a 6-way diverter valve 5 is normally retained at the state as shown by the solid line while a transformer case 1 is filled with an insulating oil 2 deaired, a gas reservior chamber 4 and a gas quantity detecting tube 6 communicating thereto is negative in the pressure. Under such a condition, before the measurement, an air release valve 13 is opened to maintain the normal pressure in the gas reservior chamber 4 and the gas quantity detecting tube 6 and the valve 13 is closed again. Then, a gas circulator 12 is actuated to circulate gas forcibly between the gas reservior chamber 4 and the gas quantity detecting tube 6 to uniformize it with an agitation. Thereafter, a port of the 6- way diverter valve 5 is switched to the channel as shown by the broken line to connect the gas quantity detecting tube 6 to a carrier gas input/ output tubes 10 and 11 whereby the gas is introduced into a gas chromatograph equipment 9. This eliminates changes in the peak output value caused by pressure in the tube 6 due to a difference in the treatment conditions of the insulating oil 2.