Network Transformer Monitoring
Con Edison of New York has performed 8,349 laboratory analyses on network transformers to verify their continued safe operation during 2012. These analyses include Dissolved Gas in Oil Analyses (DGOA) and assessment of dielectric properties. As a result of this monitoring program, we replaced 39 transformers in 2012 before failure. This program has also contributed to the overall reduction of in-service transformer failures from 164 in 2005 to 38.
An additional 5,330 DGOA samples were taken from transmission substation transformer compartments to identify potentially-faulty equipment. In 2012, four such transformers were removed prior to failure.
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