LOW COST GAS ANALYZER FOR GAS IN SF6-SEALED ELECTRIC APPLIANCE

摘要

PURPOSE:To enable the detection of a possible abnormality quickly with a high sensitivity by turning a CF4 gas generated when an internal abnormality occurs in an SF6-sealed electric appliance or an active F-containing compound generated in that case to a CF4 gas to measure CF4 separated using a column. CONSTITUTION:A sample gas from an SF6-sealed electric appliance is sampled into a sample gas measuring tube 4 from an inflow tube 11. On the other hand, air or the like is stored at a storage tank 2 with a carrier gas compressor 1 beforehand and a carrier gas is sent to the measuring tube 4 through an electromagnetic flow regulation valve 3 as required to feed the sample gas to a column 5 for separation of CF4, CO2, SF6 and the like. Only CF4 initially flowing out is measured with a detection/control/output section 6 and then, components generated later are discharged quickly as residual gas by increasing the opening of the valve 3 according to a signal of a control section 62 of the detection/ control/output section 6. Thus, an analysis can be done quickly with ease thereby enabling a quick identification of possible abnormality.