New Apparatus for Detecting H2, CO, and CH4 Dissolved in Transformer Oil

This report presents a new method of separating H2, CO, CH4, C2H2, C2H4, and C2H6 dissolved in transformer oil and detecting H2, CO, and CH4, in which a tetrafluoroethylene-perfluoroalkylvinylether copolymer membrane is used to separate gases from the oil. The quantities of H2, CO, and CH4 that permeated through the membrane were relatively large. These gases were detected with a new gas detector, which consists of a catalytic gas sensor and a gas chromatograph, and which uses air as the carrier gas. Compared with conventional methods of gas analysis, H2, CO, and CH4 dissolved in transformer oil can be analyzed simply and inexpensively with this method. As a result, this new method should prove useful in determining whether a transformer is operating normally or not.