Thermal detection system for failure in electrical apparatus and

Measuring and testing – Gas analysis – Moisture content or vapor pressure

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23230R, 23232R, 23232C, 23232E, 73 23, 73 231, 73340, 73344, 73349, 252408, 260326HL, 260558D, 310 55, 422119, 422 89, 561442, 562456, C09K 300, G08B 2100, G01K 1300, G01K 100, G01K 304, G01K 308

Patent

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042044286

ABSTRACT:
A system for detecting thermal breakdown of organic resin coatings is described which can be used for locating failure occurring in electrical apparatus based on the use of a minor amount of a chemical tagging material. The chemical tag can be readily extracted from particulate generated by the thermal breakdown of the organic resin coating by extracting the particulate with an organic solvent and analyzing the extract in a gas chromatograph using an electron capture detector. Useful results have been found when employing certain halogenated aromatic organic compounds, such as N-alkyl tetrahalophthalimides, which can be employed in the particulating resin at concentrations of as little as 0.01% by weight.

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patent: 3957014 (1976-05-01), Phillips et al.
patent: 3972225 (1976-08-01), Fort et al.
patent: 3973438 (1976-08-01), Smith et al.
Pietsch, H., et al., "Sacrificial Coatings for Improved Detection of Overheating in Generators," IEEE-PES Winter Meeting, N.Y., N.Y. (2/4/77).
Fort, E., et al., "Detection and Identification of Overheated Components of Electrical Generators," IEEE-ASME Joint Power Generation Conf., Miami, Fla. (9/19/74).

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