Product Features
1. The hardware cassette system uses DDS technology from the USA to accurately detect transformer winding faults, including distortion, displacement, tilting, inter-turn short circuits, and phase-to-phase short circuits.
2. With a high-speed dual-channel 16-bit A/D sampling system, the tester provides high accuracy and excellent repeatability, with a measurement repeatability rate above 99.5%.
3. The device supports both linear sweep and segmented sweep measurement modes for flexible transformer analysis.
4. Only the transformer connecting bus needs to be disconnected during testing. No transformer lifting or disassembly is required.
5. The signal cables can be connected flexibly without affecting test results, reducing wiring difficulty and labor intensity.
6. The frequency response curve supports both linear and logarithmic display modes to meet different analysis requirements.
7. The software supports output adjustment, automatic sampling frequency control, historical curve comparison, and intelligent diagnosis of transformer winding conditions.
8. The linear frequency sweep range reaches 2MHz with multiple scanning intervals, providing detailed analysis of winding deformation.
9. Test data and environmental parameters are automatically saved. Reports can be generated in Word format and printed for easy record keeping.
FAQs
Q1: Why is transformer winding condition testing important?
A: Transformer windings may be damaged by transportation impact, short-circuit forces, or long-term operation. FRA testing helps identify hidden mechanical changes and prevent unexpected failures.
Q2: How does a frequency response analyzer detect winding deformation?
A: The tester measures the transformer winding frequency response curve and compares changes in amplitude and resonance frequency to determine possible internal deformation.
Q3: Can the FRA tester be used after transformer transportation?
A: Yes. It can check whether winding displacement or deformation has occurred during transportation before the transformer is put into operation.
Q4: What voltage levels of transformers can be tested by this equipment?
A: The FRA tester is suitable for internal structure inspection of 63kV to 500kV power transformers.
Q5: What makes the FRA test different from traditional transformer inspections?
A: FRA testing does not require transformer opening or dismantling. It provides a non-invasive method to evaluate winding conditions quickly and safely.
Q6: How does the tester improve field testing efficiency?
A: Flexible cable connection and simple operation reduce wiring time and allow technicians to complete tests more conveniently on site.
Q7: What information can be obtained from the FRA test curve?
A: The frequency response curve shows changes in winding characteristics, helping engineers analyze displacement, deformation, and possible internal faults.
Q8: Why does the tester use different frequency sweep modes?
A: Linear and sectional sweep modes provide detailed analysis across different frequency ranges, improving the accuracy of transformer fault diagnosis.
Q9: Can test results be stored and used for future comparison?
A: Yes. The software can save historical test curves, compare different measurements, and generate diagnostic reports for condition assessment.
Q10: How can FRA testing help transformer maintenance?
A: Regular FRA testing helps detect early winding problems, reduce the risk of transformer failure, and support predictive maintenance decisions.
