Data dilemma
What do we do when one test says there seems to be no mechanical deformation in a transformer, and another says there definitely is?
byT. McGrail
What do we do when one test says there seems to be no mechanical deformation in a transformer, and another says there definitely is? What follows is but a brief outline of a case which was both a challenging puzzle in ‘real time’ and an opportunity to learn.
The transformer under investigation was the Federal Pioneer 230/72kV, 83 MVA autotransformer unit, which was one of two ‘merchant’ units serving an international tie-line. The SFRA tests were performed, and the results were inconsistent. Careful application of the ABC rule (Assume nothing, Believe nobody, Check everything) eventually solved the problem.
Read more in this column by Dr. Tony McGrail!
#ABC rule#on-site measurement#problem-solving#SFRA#windings
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