Shu Guang
Shu Guang
Explore our core engineered lineup of current-limiting fuses, dropout cutout mechanisms, and high-performance insulators engineered for extreme operating environments.
How rapid smart grid integration, renewable energy integration, and extreme weather profiles are changing the mechanical and chemical parameters of MV fuses.
Modern networks face transient overvoltages from solar and wind farms. Fuses must manage high thermal stress from cyclic loading. Our silver-element design offers superior fatigue resistance under unstable renewable conditions.
Internal quartz sand grading determines current-limiting capabilities. By using pure silica, our fuses ensure quick arc extinction, avoiding thermal runaway in harsh coastal, desert, or industrial environments.
High short-circuit currents in Energy Storage Systems (BESS) require fast clears. Our current-limiting products protect expensive inverters and sub-systems with low pre-arcing time characteristics.
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 the Yueqing Shuguang Fuse Factory established in 1992.
For over three decades, our brand "Shu Rong" has built a global reputation for manufacturing reliable protection systems. From high-voltage current-limiting fuses and power capacitor protection to zinc oxide arresters, drop-out cutout assemblies, and polymeric insulators, we supply critical components to secure modern infrastructure.
Designated by the Ministry of Electric Power Industry, our components undergo tests at major research centers to meet ANSI, DIN, BS, and IEC parameters.
Our designs pass evaluation at the High-Power Test Station of the Electric Power Research Institute, the National High-voltage Electrical Apparatus Quality Supervision and Inspection Center, the Xi'an High-voltage Electrical Apparatus Research Institute, and the High-Voltage Electrical Apparatus Laboratory. All electrical, mechanical, and thermal performance tests are qualified to international levels.
The Wenzhou Shuguang manufacturing complex utilizes advanced industrial production systems. We control raw materials to maintain supply chain resilience under shifting global trade conditions.
This control ensures our high-voltage DIN-standard fuses, backup transformer fuses, and capacitor safeguards maintain long service life with stable time-current curves.
Our medium and high-voltage fuses protect infrastructure assets, heavy machinery, and distribution systems around the world.
Protecting oil-immersed and dry-type distribution transformers against internal faults. Our DIN-standard back-up fuses clear currents while avoiding upstream tripping.
Tail-wire recovery capacitor protection fuses minimize energy discharge in fault situations, protecting nearby units from rupture.
Supporting solar collector networks and utility EV charging stations, our current-limiting designs protect converters and control equipment from thermal events.
Drop-out fuse cutouts and polymeric insulators provide isolation and fault clearance in utility systems exposed to changing weather conditions.
Industrial procurement of medium-voltage electrical products involves managing technical standards and compliance metrics. A single parameter error can lead to coordination problems, high arc flash risk, or physical switchgear damage.
Back-up fuses interrupt currents from minimum breaking current up to rating. General purpose fuses clear all currents from the minimum melting value.
Verify contact diameters and center-to-center distances: DIN dimensions (e.g. 292mm, 442mm, 537mm length with 45mm/55mm/88mm barrels) must match clip assemblies.
Fuses inside oil-immersed transformers must feature non-porous hermetic seals to prevent contact contamination and dielectric breakdown.
Quick answers to common engineering questions regarding selection, operation, standards, and deployment.
Complete your circuit protection systems with our high-voltage current-limiting fuses, capacitor protection, and insulation products.
