SFRA analyzer transformer winding deformation distortion tester digital Sweep Frequency Response Analyzer
sfra analyzer transformer winding deformation distortiontester digital Sweep Frequency Response Analyzer
1.SFRAmethod
Sweep Frequency ResponseAnalysis (SFRA) is a powerful and sensitive method to evaluate the
mechanicalintegrity of core, windings and clamping structures within power transformersby measuring their
electrical transfer functions over a wide frequency range.SFRA is a proven method for frequency measurements.
The SFRA is a comparativemethod, meaning an evaluation of the transformer condition is done by comparingan actual set of SFRA results to reference results.
2.SFRAanalyzer
Characteristics of transformerwindings are measured with frequency sweep method. Deformations of
windingssuch as distortion, swell or displacement of 6kV and above transformer aremeasured by detecting
amplitude-frequency response characteristics of eachwinding, not requiring lifting of transformer enclosure or disintegration.
3.MainTechnical Indicators
Measuring speed: | 1 min- 2 min for single-phase winding |
Output voltage: | Vpp-25V, adjusting automatically in test |
Output impedance: | 50Ω |
Input impedance: | 1MΩ (the response channel is built with 50Ω matching resistance) |
Frequency scan scope: | 10Hz-2MHz (10Hz-25MHz, optional) |
Frequency accuracy: | 0.001% |
Frequency scan manner:
| linear or logarithmic, frequency sacn interval and number of sweep points are freely settable |
Curve display: | amplitude-frequency curve (phase-frequency curve, optional) |
Width of measuring dynamic range: | -100dB~20dB |
Supply voltage: | AC100-240V 0-400Hz |
Tester weight: | only 3.6kg |