G - Physics – 01 – N
Patent
G - Physics
01
N
73/92
G01N 1/14 (2006.01) G01N 31/00 (2006.01)
Patent
CA 1127874
ABSTRACT OF THE DISCLOSURE The present invention provides an abnormal condition detector for a switchgear apparatus, comprising: joint means adapted to be removably connected to a sampling part for sampling a fluid contained in the switchgear apparatus; a valve coupled to said joint means and which can be opened and closed at predetermined times to admit said fluid therethrough for a predetermined time duration; flow rate control means which is disposed in a passage connecting to said valve for controlling a rate of flow of said sampling fluid during said predetermined time duration; detecting means connected to said flow rate control means for detecting a specific component in said fluid sampled through said flow rate control means; said specific component in said sampled fluid being a decomposed acidic gas produced by the decomposition of an insulat- ing fluid in said electric apparatus, whereby an abnormal condition of said electric apparatus is detected from the detection of said specific component; said detecting means comprising, a detecting tube for passing said decomposed gas, and a detecting material usably disposed in said tube and whose color is changed by absorp- tion of said decomposed gas, wherein said detecting material is a material whose color change length is varied depending upon a concentration of said decomposed gas of said fluid, the controlled flow rate, and the predetermined time duration during which said valve is opened.
312807
Marks & Clerk
Mitsubishi Denki Kabushiki Kaisha
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