Shu Guang
In the modern era of high-voltage power distribution, CustomOilFuse (oil-immersed fuses) play a pivotal role in protecting transformers and electrical networks. As global energy consumption continues to rise, the demand for specialized, high-reliability circuit protection in oil-immersed environments has reached an all-time high.
From the smart grids of Europe to the expanding industrial zones in Southeast Asia, oil-immersed fuses are essential. They provide back-up protection for transformers where traditional air-insulated fuses cannot operate efficiently due to environmental constraints or space limitations.
Modern industrial procurement focuses heavily on breaking capacity. Our oil-immersed fuses are designed to handle significant short-circuit currents, ensuring that the transformer remains protected even during catastrophic faults in the grid.
No two power grids are identical. The trend is shifting toward "Custom" solutions—where the fuse length, current rating, and melting characteristics are tailored to specific transformer types, such as those used in renewable energy wind farms or urban substations.
Located in Yueqing, Zhejiang Province—the Electrical Capital of China—Wenzhou Shuguang Fuse Co., Ltd. stands as a beacon of power technology. We are a comprehensive enterprise integrating research, development, production, sales, and service.
The company traces its roots back to the Yueqing Shuguang Fuse Factory, established in 1992. With over three decades of experience, we have evolved from a local workshop into a leading high-voltage technology powerhouse.
"Developing by science and technology, surviving by quality." This principle drives our daily operations, ensuring every fuse we manufacture meets the rigorous demands of the global power industry.
As a manufacturer designated by the Ministry of Electric Power Industry, our credibility is built on rigorous testing and international certification.
Our products have successfully passed evaluations at the:
We strictly comply with the highest technical performance standards: ANSI C37.42, DIN 43625, BS 2692, IEC 60282-1, IEC 60644, IEC 60470, GB 15166, and more. Our quality management system is ISO 9001:2000 certified.
The transition toward high-purity silver elements and specialized quartz sand in our HRC (High Rupturing Capacity) fuses ensures faster response times and higher thermal stability during overload conditions.
Future OilFuse designs are incorporating thermal sensors that can communicate with substation monitoring systems, providing real-time data on the state of the fuse links without needing manual inspection.
As the industry moves towards biodegradable insulating oils, we are adapting our fuse body materials to be fully compatible with synthetic esters, ensuring no degradation of performance over 20+ years of service life.
Procuring from a China CustomOilFuse Factory offers a unique blend of cost-efficiency and technical agility. Global buyers look for:
Our fuses are battle-tested in diverse environments:
Being located in Yueqing allows us access to a world-class supply chain of high-purity ceramics, copper, and specialized resins. This geographic advantage is passed on to our clients through faster lead times and higher quality control at every stage of the assembly line.
In recent years, the company has developed rapidly, and its economic and social benefits have improved significantly. We continue to deepen and improve our quality management system. While vigorously developing new products, we have always attached importance to the process flow.
High-quality raw materials and sophisticated testing equipment are the backing of our quality assurance system. All performance indicators are in line with corresponding technical conditions, and new products can be customized and produced at any time according to user needs. Our "Shu Rong" brand products enjoy a high reputation globally.




As a leading China CustomOilFuse Manufacturer, Wenzhou Shuguang Fuse Co., Ltd. has established a complete sales network throughout China and internationally. Our commitment to the "Development by science and technology" principle ensures that our high-voltage current-limiting fuses and expulsion links are always at the cutting edge of the power industry.
For global procurement officers, our factory in Yueqing represents more than just a production line; it is a hub of engineering excellence. Whether you require standard DIN fuses or specialized custom oil-immersed links for transformer protection, our technical team is ready to discuss your requirements. Our established reputation in Southeast Asia, the Middle East, Africa, and Europe is a testament to our reliability and authority in the power protection sector.