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The Doble M5400 Sweep Frequency Response Analyzer Detects Hidden Transformer Faults

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System faults, short circuits, aging, or even handling during transportation can compromise a transformer’s mechanical structure. Since these problems are difficult to detect, they usually go unnoticed and worsen over time, leading to loss of performance and possibly failure.


Doble M5400 Sweep Frequency Response AnalyzerThe Doble M5400 Sweep Frequency Response Analyzer adds a powerful tool to your quality-control and maintenance toolkit, allowing you to see inside the transformer and detect even subtle changes in the mechanical structure of the core and windings, without costly detanking.

The Doble M5400 is the most effective diagnostic tool on the market for detecting mechanical problems in power transformers.

The Doble M5400 uses sweep frequency response analysis, a proven technique for making accurate and repeatable measurements. The instrument sends an excitation signal into the transformer and measures the returning signals. Comparing this response to baseline and other results, such as from similar units, allows you to identify deviations and confirm internal mechanical problems, such as:
• Core movement
• Winding deformation and displacement
• Faulty core grounds
• Partial winding collapse
• Hoop buckling
• Broken or loosened clamping structures
• Shorted turns and open windings

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