Variable frequency series resonance test device becomes the absolute mainstream



With the development of smart grid and UHV technology, test transformers are also continuously evolving: Ultra-low partial discharge design: To meet increasingly stringent acceptance standards (such as requiring background partial discharge <3pC), modern test transformers adopt optimized electric field design and special insulation processes to ensure they do not generate interfering signals. Lightweight and modular: For field operations, the weight of dry-type transformers is further reduced, and modular splicing design is adopted, allowing a single person to carry and assemble, adapting to complex terrains. Intelligent control: Built-in high-precision sensors monitor output voltage, current, and temperature in real-time. It has automatic voltage boosting, automatic timing, and automatic voltage reduction functions. In case of breakdown or abnormality, it can cut off the power within microseconds to protect the equipment. It supports wireless remote control and data upload, generating electronic reports that comply with the latest national standards (such as GB/T 16927). Popularization of series resonance technology: For AC withstand voltage tests of long cables at 35kV and above, traditional test transformers are no longer applicable due to excessive capacity requirements, and variable frequency series resonance test devices have become the absolute mainstream. It utilizes