Winding Deformation Tester
Winding Deformation TesterBased on the measurement of characteristic parameters of the internal windings of the transformer, it adopts the internal fault frequency response analysis (FRA) method currently being developed and perfected in developed countries to make accurate judgments on internal faults of transformers.
After the transformer design and manufacturing are completed, its coils and internal structure are determined. Therefore, for a multi-winding transformer coil, if the voltage levels are the same and the winding methods are the same, the corresponding parameters (Ci, Li) of each coil should be determined. Therefore, the frequency domain characteristic response of each coil is also determined, and the frequency spectra of the corresponding three-phase coils have a certain comparability.
During the test, if inter-turn or phase-to-phase short circuits occur in the transformer, or if collisions occur during transportation causing relative displacement of the coils, or if the coils deform due to electromagnetic forces during short circuits and fault conditions during operation, the distributed parameters of the transformer windings will change. This in turn affects and changes the original frequency domain characteristics of the transformer, that is, the frequency response undergoes amplitude changes and resonance frequency point shifts, etc. The transformer winding tester developed based on the response analysis method is such a novel non-destructive testing device for internal faults of transformers. It is suitable for detecting internal structural faults of 63kV to 500kV power transformers.
Product Aliases: Power transformer winding deformation tester, transformer winding deformation detector, transformer winding deformation measuring instrument, transformer winding deformation analyzer
Product Features:
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1. The winding deformation tester uses a high-speed, highly integrated microprocessor for acquisition and control.
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2. Communication between the laptop and the instrument via USB interface
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3. Communication between the laptop and the instrument via wireless Bluetooth interface
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4. The hardware movement uses DDS dedicated digital high-speed frequency sweep technology (from the United States). Through testing, it can accurately diagnose faults such as winding distortion, bulging, displacement, tilting, inter-turn short circuit deformation, and phase-to-phase contact short circuit.
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5. High-resolution dB value measurement, dual-channel 16-bit A/D (changing the tap changer during field tests will result in obvious output changes)
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6. The signal output amplitude can be adjusted by software, with a maximum peak amplitude of 10V
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7. The computer generates electronic documents (Word) from the test results
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8. Precision, high-stability components are selected. For repeated tests on the same phase, the measurement repeatability rate is above 99.5%
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9. Finished circuit boards have special surface treatment, resistant to water and harmful gas pollution
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10. The winding deformation tester produced by our company has dual measurement system functions of linear frequency sweep measurement and segmented frequency sweep measurement, compatible with the measurement modes of the two current domestic technical schools
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