Westinghouse Electric Corporation

David W McElroy

Charles A Peterson

Clive W Kimblin

Joseph R Rostron

Randall N Avery

Albert H Maxwell, Jr

William H South

David Robert Smith

Michael W Thomas

Thomas D Poyser

John D Borst

John W Bankoske

A microprocessor-based transformer monitoring system to provide continuous on-line monitoring and analysis of transformer operation. The transformer monitoring system periodically monitors various parameters related to transformer load and condition. Maximum, minimum, and instantaneous values of the parameters are stored and analzyed. To perform the analysis, a hierarchy of thresholds is associated with each parameter. When a parameter exceeds any one of the thresholds, a response is produced by the transformer monitoring system. The type of response depends on the level of the exceeded threshold in the hierarchy. The range of response produced by the transformer monitoring system includes: continuing normal periodic data collection and analysis, increasing the rate of data collection and analysis, recommending an on-site physical check of the monitored transformer, reducing transformer load, and taking the transformer off line.

Method and apparatus for monitoring transformers

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Upper St. Clair, PA, United States of America

David W McElroy