Shu Guang
Shu Guang
Tokyo, as one of the world's most densely populated and technologically advanced metropolises, demands an electrical infrastructure of unparalleled reliability. The city's shift toward "Society 5.0" and smart grid integration has catalyzed a massive demand for precision-engineered High Voltage Fuse Suppliers and Factories. High-voltage (HV) fuses are not merely components; they are the critical sentinels protecting Tokyo's massive data centers, high-speed rail networks (Shinkansen), and the intricate underground substations that power the Kanto region.
In Tokyo's tight urban spaces, equipment must be compact and extremely efficient. Our current-limiting HV fuses are designed to interrupt massive fault currents in milliseconds, preventing catastrophic damage to expensive switchgear in basement substations across Shinjuku and Marunouchi.
With Tokyo Metropolitan Government's push for solar energy, the integration of distributed energy resources (DERs) requires specialized HV protection. Our fuses facilitate the safe connection of renewable sources to the existing medium-voltage grid, ensuring stability and safety.
Tokyo's rail network is the lifeblood of the city. We provide high-reliability HRC fuses that meet the rigorous vibration and thermal requirements of the railway industry, ensuring uninterrupted service for millions of daily commuters.
Providing world-class electrical protection since 1992.
Years of Experience
Countries Exported
Certified Quality
Standard Compliant
Located in Yueqing, the electrical capital of China, Wenzhou Shuguang Fuse Co., Ltd. (formerly Yueqing Shuguang Fuse Factory, established in 1992) has evolved into a global powerhouse in power technology. We integrate R&D, production, sales, and service to provide the international market, including Tokyo's elite industrial sectors, with premium high-voltage protection equipment.
Our commitment to excellence is backed by decades of serving the Ministry of Electric Power Industry, producing high-voltage fuses of various voltage levels, current-limiting fuses, and zinc oxide arresters that are now staples in Tokyo’s infrastructure projects.
The Tokyo industrial landscape is currently witnessing a paradigm shift. There is an increasing demand for "Smart Fuses" equipped with sensors for real-time monitoring. As HV fuse factories, we are at the forefront of this digital transformation, developing products that not only protect but also provide data on grid health.
As Tokyo’s real estate prices soar, the footprint of substations is shrinking. Our miniature fuse links (10kV 0.63A) are specifically designed for high-density switchgear applications without compromising on breaking capacity.
Echoing Japan's commitment to the environment, our polymer insulators and porcelain cutouts are manufactured using eco-friendly processes, ensuring long-term durability in Tokyo’s coastal environment with high humidity and salt spray.
Tokyo's major utilities are increasingly aligning with international standards like IEC60282 and DIN43625. Our full range of HRC fuses is rigorously tested at Xi'an High-voltage Electrical Apparatus Research Institute to meet these stringent global benchmarks.
Our highest technical performance meets: ANSIC37.42, DIN43625, BS2692, IEC282-2-1995, IEC60644, IEC60470, IEC60282-1, IEC269-2 and GB standards. Our quality assurance system has passed IS09001: 2000 certification, ensuring that every fuse supplied to the Tokyo market is of the highest reliability.
Critical protection for Koto-ku and Inzai data hub power distribution units.
High-voltage protection for heavy machinery and manufacturing plants in Tokyo Bay.
Compact HRC fuses for space-constrained underground power vaults in Central Tokyo.
As a leading name among high voltage fuse factories, we understand the specific nuances of the Japanese market. Our products are exported to various provincial power companies in China and throughout Southeast Asia, the Middle East, and Europe. We adhere to the principle of "Development by science and technology, and survival by quality."
