Product Overview The SFRA (Sweep Frequency Response Analysis) analyzers FRAX99, FRAX101, and FRAX150 are the smallest and most robust devices of their kind, as well as powerful tools for detecting potential electrical and mechanical issues in power transformers, many of which are difficult or impossible to detect with other methods.
Meeting all international SFRA measurement standards, these innovative devices offer a wider dynamic range and better accuracy than any other comparable test sets currently available. They utilize a specialized cable connection technology for transformer testing, ensuring repeatability of results.
The FRAX series operates by applying a sweep frequency test signal to the transformer and monitoring its response. The result is a unique fingerprint that reveals a wide range of faults compared to the baseline fingerprint for the same transformer. These include winding deformations and shifts, short circuits, open circuits, loose or damaged clamp connections, core connection issues, core movement, and ring bending.
Megger's FRAX series includes powerful analysis and support software. Besides traditional amplitude versus frequency/phase plots, the software allows data representation as impedance or admittance versus frequency, providing a powerful analytical tool for various transformer types.
The test frequency range of FRAX spans from 0.1 Hz to 25 MHz, with adjustable settings for individual tests. The default number of test points per frequency scan is 1046, expandable up to 32,000. Typical measurement time is 64 seconds, with a fast mode available that delivers results in just 37 seconds.