FRA 5311 Sweep Frequency Response Analyzer

HAEFELY / Tettex

Many dielectric and mechanical failures in large power transformers are preceded by mechanical changes in the winding structure. The FRA 5311 Sweep Frequency Response Analyzer by HAEFELY detects transformer winding movements and mechanical failures due to mechanical shock, transportation or short circuits. Detection of these displacements ahead of a dielectric failure can reduce unplanned maintenance costs, and provide the possibility to improve system reliability by preventing outages. Additionally, when damage is discovered, repairs may be targeted to a specific phase winding. Changes in the winding geometry will be reflected by deviations between repeated measurements. Even small winding movements or distortions will cause legible changes in the measured transfer function, which is clearly detectable.


FRA 5311 Frequency Response Analyzer Features

  • Measures according to IEC 60076-18 and IEEE C57.149
  • Measures magnitude (dB), phase angle (°), impedance (Ω), admittance (S), and ratio
  • High signal to noise ratio due to output voltage up to 11 Vpp at 50 Ω
  • IEC 60076-18 Appendix E XML file format compatible to import, export, and share test results with other devices
  • Rugged, lightweight, and smallest SFRA instrument on the market
  • One single USB connection for data and power to a laptop
  • Windows based, easy to use graphical interface, including analysis mode for curves comparison and automatic reporting capabilities
  • Predefined test sequences for most common transformers

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