Transformer winding deformation tester frequency response method internal fault impedance method comprehensive three-phase automatic test equipment
The "comprehensive three-phase automatic test equipment combining frequency response method and impedance method" you mentioned is currently the most advanced and mainstream high-end detection equipment used in power systems to detect internal faults in transformers (such as winding distortion, bulging, displacement, etc.). This type of equipment perfectly integrates two detection technologies, not only greatly improving diagnostic accuracy but also significantly enhancing on-site testing efficiency.
Combining industry-leading technology and mainstream product parameters, here is a detailed overview of the core functions and technical advantages of this comprehensive test equipment:
1. Dual-method integration: comprehensive reflection of winding characteristics
This equipment integrates the Frequency Response Analysis (FRA) method and the low-voltage short-circuit impedance method, using two different approaches to measure power transformer windings, comprehensively reflecting the winding characteristics and more accurately analyzing and diagnosing winding deformation:
Frequency Response Method (FRA): Uses the sweep frequency method to measure transformer winding characteristics. Without the need for lifting the transformer cover or disassembly, it can accurately measure winding distortion, bulging, or displacement by detecting the amplitude-frequency response characteristics of each winding.
Impedance Method: Specifically used to measure the impedance characteristics of power transformers, accurately reflecting the overall changes before and after winding deformation, and is an important means to determine whether a transformer has suffered from sudden short-circuit impacts in nearby areas.
2. Three-phase automatic testing: significantly improving work efficiency
Traditional testing often requires manual phase-by-phase wiring and recording, while modern comprehensive test instruments achieve a high degree of automation:
Three-phase automatic testing: Both the frequency response method and the impedance method support three-phase automatic testing. After setting parameters, all measurement work can be completed with just one key press, saving a lot of manual climbing and wiring time on transformers, greatly shortening testing time.
Automatic analysis and diagnosis: The software can automatically calculate the impedance error percentage, and automatically perform horizontal (between A, B, C phases) and vertical (compared with historical data) analysis of the three-phase amplitude-frequency response curves, automatically diagnosing the degree of winding deformation (such as normal, slight, moderate, severe deformation), and providing diagnostic reference conclusions.
3. High precision and strong anti-interference design
To cope with complex on-site environments, this type of equipment has been comprehensively upgraded in both hardware and software:
High-frequency precision: Uses digital frequency synthesis technology (DDS), with a sweep frequency range typically up to 10Hz to 2MHz, extremely high frequency accuracy (better than 0.001%), and extremely strong frequency stability.
Safety protection: Equipped with 5000V voltage isolation function, fully protecting the safety of the test computer and operators.
Data management: Built-in powerful database management function, test data is automatically saved, and can be exported with one click to generate standardized test reports in Word or Excel format, convenient for archiving and printing.
4. Strict compliance with national and international standards
The software and hardware indicators of this type of comprehensive test instrument strictly meet authoritative domestic and international standards, ensuring the legality and accuracy of test results:
Frequency response method standards: Complies with power industry standard DL/T 911-2016 and international electrotechnical standard IEC 60076-18.
Impedance method standards: Complies with DL/T 1093-2008 and IEC 60076-5 standards.
💡 Further assistance
The transformer winding deformation comprehensive tester is a "perspective eye" for ensuring the safe operation of large power transformers and preventing malignant accidents. May I ask what your specific needs are currently:
Product selection and parameter comparison: Do you need me to sort out how to choose the appropriate sweep frequency range (such as 1MHz or 2MHz) and impedance test current (such as 10A or 50A) based on the capacity of the transformer under test when purchasing such comprehensive test instruments?
On-site testing and wiring specifications: Do you need to understand the wiring specifications for the high and low voltage sides during frequency response method testing, or the specific operation steps and precautions for short-circuiting the low voltage side during impedance method testing?
Spectrum analysis and fault diagnosis: After obtaining amplitude-frequency response curves or impedance deviation data in actual testing, do you need assistance in analyzing peak/valley shifts to determine whether the winding has undergone axial displacement, radial deformation, or inter-turn short circuits?
