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Products
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M5000 Sweep Frequency Response Analyzer SeriesDetect hidden transformer faults using sweep frequency response analysis (SFRA)Sweep Frequency Response AnalysisSweep frequency response is a major advance in transformer condition analysis, allowing you to "see" inside transformers without costly detanking. The standard definition of frequency response analysis (FRA) is the ratio of a steady sinusoidal output from a test object subjected to a steady sinusoidal input. Sweeping through the frequency range of interest gives rise to the S in SFRA, to distinguish it from impulse methods, which estimate the response rather than measure it. SFRA is a proven technique for making accurate and repeatable measurements. As compared to the “impulse” technique, SFRA is preferred for frequency domain measurements. It covers the full dynamic range and maintains the same energy level for each frequency, providing accurate, consistent results. A high signal-to-noise ratio across the entire 20 Hz to 2 MHz frequency range ensures valid measurements.
Doble M5000 SeriesDoble’s M5000 series uses sweep frequency response analysis to detect mechanical failure or movement of windings from short circuits, mechanical stresses, or transportation. The instruments send an excitation signal into the transformer and measure 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.
Use the M5300 or M5400 Sweep Frequency Response Analyzer to ensure transformer performance, reduce maintenance cost, and increase service life. Both instruments perform the same functions, but the M5300 has a built-in PC and visual display and comes with a laptop keyboard. The M5400 requires an external laptop for operation.
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