Generator monitoring apparatus

Radiant energy – Methods including separation or nonradiant treatment of test...

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Details

73 231, 250380, 250381, G01N 3100, G01T 118

Patent

active

040829480

ABSTRACT:
Certain internal parts of a gas cooled dynamoelectric machine may be coated with selected materials which will decompose at elevated temperatures to give off sub-micron particles into the machine gas coolant called pyrolysates. The presence of such pyrolysates in the machine gas coolant is indicative of localized overheating within the dynamoelectric machine. A detector is known for sensing the occurrence of these pyrolysates and hence a monitoring system has been devised for giving an early warning of machine overheating. Occasionally, oil mist particles from the machine may become entrained in the machine gas coolant and cause a false overheating signal from the detector. A second detector has been devised which may be used in combination with the first detector to provide a redundant monitoring system which will provide immediate validation of the presence of pyrolysate particles and which monitoring system is testable on line.

REFERENCES:
patent: 3185845 (1965-05-01), Lively et al.
patent: 3427880 (1969-02-01), Grobel et al.
patent: 3940618 (1976-02-01), Donguy
patent: 3968371 (1976-07-01), Greendale

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