Technical brochure
TB 812 WG A2.53

Advances in the interpretation of transformer Frequency Response Analysis (FRA)

Measurement of winding frequency response is now commonly used to assess the mechanical integrity of the active part of power transformers. The analysis of the results, so-called Frequency Response Analysis (FRA), is based on comparison with a reference measurement which is either a previous measurement on the same unit, a measurement on an identical transformer, or a measurement on another phase of a three-phase transformer.

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Power transformers and reactors

This Technical Brochure has been created by a Working Group from the CIGRE Power transformers and reactors Study Committee which is one of CIGRE's 16 domains of work.
Within its technical field of activity, SC A2 addresses topics throughout the asset management life-cycle phases; from conception
through research, design, production, deployment, operation, and end-of-life.

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