Frequency Response Analysis (FRA)

HVEX offers SFRA (Sweep Frequency Response Analysis), an advanced solution for frequency response analysis of power transformers, reactors, motors, and other linear systems. The SFRA test is an essential tool in predictive maintenance, enabling early detection of mechanical and electrical faults that may compromise the performance and service life of electrical equipment. By applying frequency-domain techniques, Frequency Response Analysis performs precise sweeps over a wide frequency range, identifying winding displacements, structural deformations, inter-turn short circuits, insulation changes, and issues in magnetic cores. With HVEX SFRA, it is possible to perform measurements such as: Spectral signature analysis. Open-circuit measurement. Short-circuit measurement. Capacitive and inductive resonance tests. Transfer function evaluation. The system strictly complies with major international and national standards, ensuring the reliability and repeatability of results: IEEE Std C57.124 IEEE Std C57.113 IEEE Std 1434 IEC 60270 IEC 60060 IEEE Std 400 NBR 5356 The application of Frequency Response Analysis (SFRA) in transformers helps reduce the risk of catastrophic failures, minimize corrective maintenance costs, and extend the service life of critical assets. HVEX provides state-of-the-art technology for companies seeking excellence in predictive maintenance of transformers and in the management of their high-voltage assets.