Lvnengde LNBR635 Transformer Winding Deformation Tester Deformation Frequency Response Characteristic Test Device
Regarding the "Lvnengde LNBR635 Transformer Winding Deformation Tester" you mentioned, detailed parameter information for this specific model (LNBR635) was not found in publicly available data. However, according to relevant information, Wuhan Lvnengde Precision Measurement Technology Co., Ltd. is indeed a professional manufacturer in this field, focusing on high-precision transformer comprehensive testing platforms, with automatic measurement functions for winding deformation (SFRA), and test data can be directly connected to the PMS2.0 system of provincial electric power research institutes.
Although specific specifications for LNBR635 cannot be provided, based on the manufacturer's technical background and industry common standards, we have organized the core technical and application information for such "Transformer Winding Deformation Testers (Frequency Response Characteristic Test Devices)" as follows:
1. Core Working Principle (Frequency Response Method)
This type of equipment mainly uses internal fault frequency response analysis (FRA) technology.
Non-destructive testing: No need to lift the cover or disassemble the transformer; testing can be completed only through external wiring.
Testing logic: The instrument injects a sinusoidal excitation signal of a certain frequency range into the transformer winding, collects the response signal, and calculates the transfer function. When the transformer winding is distorted, bulged, or displaced due to short-circuit current impact or physical collision, its internal distributed inductance and capacitance parameters will change, resulting in changes in the frequency domain characteristic response (amplitude-frequency response curve).
2. Core Technical Features and Parameters
Combining the technical indicators of mainstream transformer winding deformation testers, such equipment typically has the following characteristics:
High-precision frequency sweep: Uses digital frequency synthesis technology (DDS), with a sweep frequency range typically up to 1kHz-2MHz, and extremely high frequency accuracy (better than 0.001%), ensuring data stability and repeatability.
Efficient measurement: High detection efficiency, with the complete measurement time for a single winding usually controlled within 1-3 minutes.
Intelligent diagnosis: The accompanying software supports simultaneous loading of multiple (e.g., 9) historical test curves for horizontal and vertical comparison, automatically calculates correlation coefficients, and intelligently outputs diagnostic conclusions.
Safety protection: Built-in high-voltage isolation protection module (e.g., 5000V isolation), completely blocking the risk of on-site high voltage intrusion, ensuring the safety of the testing computer.
3. Main Application Scenarios
Handover and preventive tests: Used for factory and pre-commissioning tests of power transformers with voltage levels of 6kV and above, to retain the original frequency response fingerprint.
Fault troubleshooting: When a transformer suffers a nearby sudden short circuit or physical impact during operation or transportation, by comparing with original records, determine whether the winding is damaged and the extent of damage, and decide whether major repair is needed.
💡 Selection and Procurement Suggestions
If you are evaluating this LNBR635 device from Wuhan Lvnengde Precision Measurement, it is recommended that you directly verify the following key information with the manufacturer:
Implementation standards: Confirm whether the equipment strictly complies with the latest power industry standard DL/T911-2016 and the international standard IEC60076-18.
System compatibility: Confirm whether the data format of the equipment supports seamless integration with the PMS2.0 system of your provincial power grid.
Core parameters: Request the specific factory inspection report for this model, focusing on verifying core indicators such as sweep frequency range, frequency accuracy, dynamic range, and isolation voltage.
