Xi’an, October 15, 2025
The 2025 Arrester Technology Training and Standard Promotion Conference, hosted by XIHARI and co-hosted by TGE., entered its second key day. With a focus on the core topics of “non-linear metal oxide varistor manufacturing” and “arrester testing”, the conference attracted enthusiastic participation from professionals across the industry.
In the morning, Zhao Dongyi, Chief Technology Officer of TGE, delivered a keynote speech titled “Key Manufacturing Technology and Quality Control of Non-linear Metal Oxide Varistors”. Starting with the intrinsic connection between the micro-structure of varistors and their U-I curves, Mr. Zhao presented manufacturing case videos of international enterprises such as HUBBELL and ABB to intuitively demonstrate process details. He also conducted a comparative analysis of technical solutions from teams including Hitachi Energy and Bo-wen Wang, and systematically disassembled the whole-process key technologies and quality control points—covering raw material configuration, slurry preparation, spray granulation, compression molding, high-temperature sintering, side insulation treatment, metallized electrodes, and testing experiments.
Furthermore, Mr. Zhao shared the application challenges of varistors in new working conditions such as "transmission line lightning protection" and "multiple lightning strikes in substations", introduced new processes like mechanical grinding mixing and coating/core-shell technology, and presented cutting-edge research results including grain boundary atomic structure and ultra-fast impulse current response testing. Concluding with future-oriented topics such as carbon footprint, lunar power systems, and attosecond physics, he called on Chinese electrical enterprises to keep pace with the wave of technological transformation. During the post-lecture interaction, participants had in-depth discussions with experts including Zhao Dongyi, Zuo Zhongqiu, and Wang Lulu on practical issues such as "online monitoring of multiple lightning strikes on arresters at substation incoming lines", and reached a consensus on "strengthening the rigor of basic concepts and ensuring the consistency of product processes".
In the afternoon, Huang Jiarui, an expert from the Inspection and Testing Center of China Electric Power Research Institute, delivered a presentation on “Arrester Sampling Test Methods and Data Analysis”. Starting from arrester principles and basic test theories, and combining a large number of practical cases, Mr. Huang elaborated on the statistical analysis methods of sampling test data, and provided in-depth interpretation of the causes and improvement measures for common unqualified items—offering participating enterprises a quality control plan with both theoretical and practical value.
As a co-host, TGE is committed to promoting technological exchange and innovation in the arrester industry, and will continue to contribute professional strength to the standardized development of the sector.
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