G - Physics – 01 – N
Patent
G - Physics
01
N
324/26
G01N 27/12 (2006.01) G01N 17/00 (2006.01) G01N 27/04 (2006.01)
Patent
CA 1286361
ABSTRACT OF THE DISCLOSURE: An element for detecting internal faults in an insulating gas charged electrical apparatus comprises a substrate disposed in the electrical apparatus charged with an insulating gas, a pair of electrodes disposed on the substrate, and a thin metal film covering the pair of electrodes and the exposed surface of the substrate. This film is capable of producing fluorides with low conductivity upon reacting with a decomposed gas produced by internal faults of the electrical apparatus. Since the thin metal film exhibits high response characteristics readily in reaction with even a trace amount of a decomposed gas, it is possible to promptly detect faults occurring in the electrical apparatus, such as a partial discharge or local heating. In addition, a device for detecting internal faults in an insulating gas charged electrical apparatus using the internal fault detection element utilizes an optical signal for transmitting signals. Accordingly, the device is free from electromagnetically induced interference and it capable of remote monitoring because of the low level of loss in signal transmission.
557745
Matsushita Yoshifumi
Minagawa Tadao
Suzuki Toshihiro
Yamasaki Ichiro
Yoshioka Takeo
Marks & Clerk
Matsushita Yoshifumi
Minagawa Tadao
Mitsubishi Denki Kabushiki Kaisha
Suzuki Toshihiro
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