Shu Guang
Shu Guang
In the contemporary landscape of global power distribution, High Voltage Fuses (HvFuses) serve as the critical "first line of defense" for electrical infrastructure. As nations transition toward smarter grids and renewable energy integration, the demand for robust ODM (Original Design Manufacturer) services in China has reached unprecedented heights. Currently, the global HV fuse market is undergoing a massive transformation, driven by the expansion of urban power networks in emerging economies and the retrofitting of aging infrastructure in developed Western markets.
Industrial applications for HvFuses have expanded beyond traditional power substations. Today, they are indispensable in Renewable Energy Farms (Wind and Solar), Electric Vehicle (EV) Charging Super-hubs, and Heavy Manufacturing Plants. China's role as a leading factory hub for these components is not merely about volume; it is about the sophisticated integration of advanced materials and precision engineering that meets stringent international standards like IEC and DIN.
Modern HV fuses are evolving to include sensing capabilities, providing real-time data to grid operators. Our factory is at the forefront of this digital-analog integration.
As PV systems scale to higher voltages (1500V and above), specialized current-limiting fuses are required to protect expensive inverter systems from catastrophic faults.
Strategic manufacturing in Wenzhou allows for rapid deployment to Southeast Asia, Europe, and the Middle East, reducing lead times for critical infrastructure projects.
Wenzhou Shuguang Fuse Co., Ltd. is strategically located in Yueqing, Zhejiang Province—widely recognized as the "Electrical Capital of China." We are a premier power technology enterprise that seamlessly integrates research, development, production, sales, and service.
Tracing our roots back to 1992 with the establishment of the "Yueqing Shuguang Fuse Factory," we have accumulated over three decades of specialized experience. This deep industry heritage allows us to offer unmatched expertise in ODM and OEM services for global clients seeking reliable circuit protection.
The core of an HV fuse—the fuse element—is now being manufactured using high-purity silver and specialized copper alloys. Our China factory utilizes precision laser cutting to ensure the "M-effect" is perfectly calibrated for specific time-current characteristics. This precision is vital for protecting oil-immersed transformers and high-voltage motor circuits where startup inrush currents must be handled without compromising long-term protection.
As short-circuit levels in urban networks rise, there is a global procurement demand for fuses with higher interrupting capacities (up to 50kA or 63kA). We utilize high-grade quartz sand with specific grain sizes and high SiO2 content to ensure rapid arc quenching, preventing explosive failure of the fuse body during high-energy faults.
Wenzhou Shuguang Fuse is designated by the Ministry of Electric Power Industry. Our products undergo rigorous testing at the highest authority labs.
Our products have passed the high-power test stations of the Electric Power Research Institute, 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 to meet:
In high-density urban centers, our high-voltage current-limiting fuses protect indoor transformers where space is limited and reliability is paramount to prevent blackouts.
With the rise of 800V EV architectures, our specialized DC fuses are used in fast-charging stations to protect against high-energy battery discharge faults.
Protection of medium-voltage motors in mining and oil & gas facilities requires fuses that can withstand repeated starting currents without fatigue.
Why do global enterprises choose our ODM services? It's the combination of agile manufacturing and cost-efficiency. Unlike large Western conglomerates with rigid product lines, our Wenzhou facility can customize fuse characteristics—such as specific body dimensions or non-standard strike force ratings—at a fraction of the time and cost. We provide full transparency in raw material sourcing (high-alumina ceramics, silver elements) and 100% routine testing before shipment.
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 the quality assurance system. All performance indicators are in line with the corresponding technical conditions, and new products can be customized and produced at any time according to user needs. "Shu Rong" brand products have enjoyed a high reputation among domestic and foreign users.
Our products are exported to various provincial power companies in China. A complete sales network has been formed throughout the country. Internationally, our high-voltage fuses and current-limiting products are exported to Southeast Asia, the Middle East, Africa, Europe, and other regions. Our domestic sales rank among the top in the industry.
