G - Physics – 01 – N
Patent
G - Physics
01
N
73/93
G01N 33/00 (2006.01) G01N 30/06 (2006.01)
Patent
CA 1147575
ABSTRACT OF THE DISCLOSURE A method and apparatus for diagnosing an overheating of a gas-cooled type electric machine having at least some components coated with an organic insulating material which decomposses into particles when subjected to high temperatures. The apparatus includes an extracting arrangement for enabling an extraction of gas from any region in an interior space of the electric machine. A device is provided for detecting a density of the particles contained in the gas and an arrangement is provided for analyzing a composition of the particles in the coolant gas so that, at first, an overheat region may be found and, secondly, an overheat position in the overheat region can be determined on the basis of the organic composition of the particles contained in the coolant gas.
359681
Narato Kiyoshi
Niwa Sadahiko
Ohtsuka Keizou
Hitachi Ltd.
Kirby Eades Gale Baker
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