Elecgene sweep frequency response analyzers are designed for factory and field assessment of power transformers, distribution transformers, autotransformers, reactors and other transformer-type equipment.
By comparing the measured SFRA curve with a factory baseline, previous test result, another phase or a transformer of the same design, engineers can identify response changes that may be associated with winding deformation, axial or radial displacement, core movement, loosened clamping structures and lead connection changes.
WDT-200 use SFRA method to assess whether or not a transformer has been subject to mechanical damage. It is built into a tough carry case which includes an on-board computer making it even more transportable.
Small and light-weight for easy use
Meet IEC 60076-18 standard
Analysis software allows further diagnostics
Built-in all functional PC with keyboard and touch pad
Mini-WDT sweep frequency response analyzer uses frequency analysis to evaluate whether a transformer has suffered mechanical damage and complies with IEC60076-18.
Meet IEC 60076-18 standard
Portable and light-weight for easy use
Analysis software allows further diagnostics
Reproducible results thanks to innovative connection technique
Elecgene SFRA testers provide a wide frequency sweep range for transformer response analysis. The WDT-200 covers 10 Hz to 16 MHz, with an optional range up to 30 MHz, supporting detailed frequency-response measurement across different transformer structures.
Depending on the model and hardware configuration, Elecgene SFRA systems can display amplitude-frequency and phase-frequency response curves to provide additional information for transformer response analysis.
SFRA results can be compared across transformer phases or with stored reference data to identify significant changes in response characteristics. Elecgene software can load and compare multiple curves and perform correlation analysis to support winding deformation assessment.
SFRA provides a repeatable frequency-response signature that can be stored and compared with previous test results. This supports transformer condition assessment after transportation, fault events, maintenance or other situations that may affect internal mechanical condition.
Elecgene offers compact SFRA solutions for field transformer testing. The WDT-200 integrates the test system and on-board computer into a transportable case, while the Mini-WDT provides a more compact configuration for on-site frequency response testing.
An SFRA tester is a transformer diagnostic instrument that sweeps a low-voltage signal through a range of frequencies and measures the transformer's response. The resulting curve is used to identify possible changes in winding, core, leads or clamping structures.
SFRA testing can help identify possible changes such as winding deformation or displacement, core movement, clamping structure changes, shorted turns, open windings and core connection problems. The specific interpretation depends on the transformer design, test configuration and comparison data.
The analyzer applies a sinusoidal signal to a transformer winding, changes the signal frequency and measures the output response. It calculates magnitude and phase relationships and displays them as frequency response curves.
Reference data provides a baseline for comparison when evaluating SFRA results. Ideally, results are compared with previous measurements from the same transformer. When historical data is unavailable, phase-to-phase comparison, data from similar transformers or other appropriate reference curves may also provide useful information.
SFRA testing can be performed during transformer commissioning and maintenance, and is particularly useful after transportation, severe short-circuit events, major maintenance or other events that may have affected the transformer’s internal mechanical structure. Periodic testing can also provide reference data for future condition assessment.
Please tell us your testing requirements, application scenarios or project details, and our engineers will recommend the solution and quotation that suits you within 24 hours.
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