Mitsubishi Denki Kabushiki Kaisha

Sadao Naito

Katsumi Shiono

Hideo Shinohara

Toshitsugu Ishii

Yoshihiro Makino

Goroo Ikeda

An apparatus for automatically analyzing gases in oil, wherein a gas analyzer analyzes the total quantity of combustible gases extracted from the oil or the quantities of several specified ones of the combustible gases, comprising a data processor determining the presence or absence of the abnormality of an oil-immersed equipment on the basis of the increasing or decreasing trend of the analyzed results obtained in several analyzing operations, or calculating the sampling period of oil sampling and analytical processing routines, on the basis of the increasing or decreasing trend of the analyzed results, whereby the abnormality can be automatically determined with a high reliability.

Apparatus for automatically analyzing gases in oil

An apparatus for monitoring gas dissolved in an electrically insulating oil used in an electrical apparatus comprises a sampling device connected to a tank for sampling a portion of the insulating oil from the electrical apparatus, an extracting device connected to the sampling device for extracting a volume of dissolved gas from the portion of the insulating oil in the sampling device, and a measuring device connected to the extracting device for measuring the components of the dissolved gas. All of the volume of dissolved gas is delivered from the extracting device either by pumping the oil from the tank to the extracting device to force the dissolved gas to the measuring device or by using a plate of the extracting device to force the dissolved gas therefrom. All of the volume of dissolved gas measured is exhausted from the measuring device. The portion of the insulating oil remaining in the extracting device is returned to the tank.

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Ako, Japan

Sadao Naito