Detection of incipient faults in hydrogen-cooled generators

Details Detection of incipient faults in hydrogen-cooled generators Detection of incipient faults in hydrogen-cooled generators

1976-10-15

1978-07-18

Queisser, Richard C.

Chemistry: physical processes

Physical processes

Crystallization

23254R, 73 23, G01N 3100

Patent

active

041012771

ABSTRACT:
A method and apparatus are disclosed for the detection of incipient faults in large hydrogen-cooled dynamoelectric machines such as turbine generators. Such machines operate in a hydrogen atmosphere, for cooling, and unavoidably contain some air. The heating of organic insulation, or of metallic parts of the machine, associated with incipient faults results in oxidation or other reactions that reduce the amount of free oxygen present in the machine atmosphere. The occurrence of such incipient faults is detected by monitoring the oxygen content to detect any substantial reduction in the concentration of free oxygen. Since the amount of air in the machine may vary, it is preferred to monitor the oxygen content by determining the ratio of nitrogen to oxygen in the machine.

REFERENCES:
patent: 3566673 (1971-03-01), Kogan
patent: 3680359 (1972-08-01), Lynch
patent: 3866460 (1975-02-01), Pearce

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