Shu Guang
The global power infrastructure is undergoing a massive transformation, driven by the integration of renewable energy sources and the digitalization of power grids. In this context, China Potential Transformer Fuses (PT Fuses) play a critical role. Potential transformers are essential for metering and protection in high-voltage systems. Without specialized fuses like the XRNP series, these transformers are vulnerable to short-circuit faults that can lead to catastrophic system failures.
Currently, the industrial demand for high-reliability PT fuses is peaking in North America, Europe, and the rapidly industrializing Southeast Asian belt. As smart grids require more precise sensing, the transformers providing that data must be protected by fuses that offer high breaking capacity and low power loss. Wenzhou Shuguang Fuse Co., Ltd. stands at the forefront of this industry, providing standardized and customized solutions that meet stringent global requirements.
The shift toward "Green Grids" requires fuses capable of handling variable loads from solar and wind farms. Our H.R.C. fuses are engineered to provide stable performance under diverse climatic conditions.
Aging grids in developed nations are being replaced with modern medium-voltage (12kV - 40.5kV) systems, significantly increasing the procurement of DIN standard and IEC-compliant current-limiting fuses.
There is a growing convergence towards IEC 60282 and DIN 43625 standards globally. Our products are fully certified to these international benchmarks, ensuring seamless integration into any global project.
Wenzhou Shuguang Fuse Co., Ltd. is located in Yueqing, Zhejiang Province, the electrical capital of China. We are a power technology enterprise integrating research, development, production, sales, and service. The predecessor of Wenzhou Shuguang Fuse Co., Ltd. was "Yueqing Shuguang Fuse Factory," established in 1992.
For over three decades, we have focused on the niche but vital sector of high-voltage protection. Being designated by the Ministry of Electric Power Industry, we have evolved from a local factory into a global supplier, maintaining the spirit of "Development by science and technology, and survival by quality."
Procurement teams from global utilities and industrial giants are no longer just looking for a "part"; they are looking for reliability. ChinaPotentialTransformerFuses are applied in diverse environments:
Our products meet ANSI C37.42, DIN 43625, BS 2692, and IEC 60282-1. This makes them compatible with nearly every electrical grid architecture in the world.
We offer direct factory pricing, rapid prototyping for custom fuse links, and a supply chain that ensures lead times are kept to a minimum compared to European or American manufacturers.
Every batch undergoes tests at the National High-voltage Electrical Apparatus Quality Supervision and Inspection Center, ensuring zero-defect delivery.
Established
Export Countries
IEC Compliant
9001:2000 Certified
In recent years, Wenzhou Shuguang Fuse has developed rapidly. Our economic and social benefits have improved significantly through the implementation of a deepening quality management system. While vigorously developing new products like the XRNP series and specialized EV fuses, we prioritize the process flow above all else.
High-quality raw materials, such as high-purity silver for fuse elements and reinforced ceramic bodies, coupled with sophisticated testing equipment, form the backbone of our quality assurance. We can customize performance indicators based on specific user needs, including unique time-current characteristics or physical dimensions.
Our expertise is recognized by national and international bodies. Our products have passed the high-power test station of the Electric Power Research Institute of the Ministry of Electric Power, the National High-voltage Electrical Apparatus Quality Supervision and Inspection Center, and the Xi'an High-voltage Electrical Apparatus Research Institute. All performance tests are qualified, providing our customers with absolute reliability.





Our products are exported to various provincial power companies in China and a complete sales network spans the globe. We rank among the top in the industry for domestic and export sales.
From 12kV to 40.5kV, we can adjust dimensions (like the 55*520mm or 88*192mm series) and electrical ratings to meet the specific needs of regional grid operators.
Based in Yueqing, we leverage the world's most dense electrical component supply chain, ensuring we stay competitive on price without sacrificing quality.
We sincerely welcome customers from home and abroad to discuss cooperation. Whether you are a utility provider looking for a long-term contract or a distributor seeking high-quality OEM/ODM services, Wenzhou Shuguang Fuse Co., Ltd. is your authoritative partner in China for potential transformer fuses and high-voltage protection equipment.