G - Physics – 08 – B
Patent
G - Physics
08
B
340/143, 73/97
G08B 21/00 (2006.01) G01N 33/28 (2006.01) H01F 27/40 (2006.01) H02H 5/06 (2006.01)
Patent
CA 1167279
ABSTRACT OF THE DISCLOSURE A system for monitoring an abnormality of an oil-filled electric device by detecting the compo- nents of the gas staying dissolved in the insulating oil in said oil-filled electric device is constituted from a gas-in-oil separator which separates the gas from the insulating oil in an oil-filled electric device, a gas reservoir where the separated gas is collected, an air feeder which supplies air for delivering out the gas in said gas reservoir, a separating column packed with a gas separating filler whereby the gas supplied from the gas reservoir is separated into the components, a gas detector unit comprising a combustible gas detector element disposed in a case which connects at its one end to the outlet of said separating column and opens at its other end into the atmosphere, and a change-over valve disposed at a location connecting said gas reservoir, said air feeder and said separating column and adapted to switch a route passing the air from the air feeder into the separating column along with the gas via the gas reservoir to or from a route passing the air directly into the separating column. This system is capable of easily detecting the components in the gas in the insulating oil to allow monitoring of an abnormality with high reliability. Also, according to the system of this invention, at least the components CH4 and H2 in the separated gas are measured separately, and in case it is judged that an abnormality is present, the type of such abnormality is judged from the ratio of said components.
377795
Ohe Etsuo
Sugawara Katuo
Tani Ichitaro
Tsukioka Hideo
Hitachi Ltd.
Kirby Eades Gale Baker
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