Sanbian Science & Technology Co., Ltd. is one of the outstanding listed companies in the power transmission and transformation industry. Founded in 1968, it covers an area of 340,000 square meters with an annual production capacity of 40 million kVA. The company is a National Key High-Tech Enterprise, a National Specialized, Refined, Differential and Innovative "Little Giant" Enterprise, a National Quality and Efficiency Advanced Enterprise, one of the Top 10 Transformer Enterprises in China, and a Zhejiang Provincial High-Tech Enterprise. It has a national-level postdoctoral workstation, a provincial-level enterprise technology center, and a provincial-level transformer research institute, with independent R&D facilities, complete R&D and testing equipment, and a comprehensive quality, environmental and occupational health "three-in-one" management system.

The company's main products include 500kV and below oil-immersed power transformers, 220kV and below railway traction transformers, 35kV and below small and medium-sized oil-immersed low-loss distribution transformers, resin-insulated and H-class vacuum-impregnated dry-type transformers, anti-corrosion petrochemical special transformers, combined substations, buried transformers, wind and photovoltaic combined transformers, amorphous alloy transformers, single-phase self-protective transformers, cable branch boxes, ring main units, switch cabinets, special transformers, etc., covering more than 2,000 specifications and models.

The company is equipped with world-class processing equipment, such as the German Georg core cutting production line, corrugated tank production line, German Hensel epoxy resin casting system, Canadian MTM full-series automatic material iron core transverse shearing line and large iron core stacking and shearing integrated machine, Japanese Amada CNC multi-position punch press and CNC bending machine, intelligent iron core production line, dry-type transformer core stacking assembly line, and large transformer tank welding robot workstation, etc. The ultra-high voltage test center is equipped with 3000kV/300KG impulse voltage generators, Swiss Test System partial discharge testing systems, and American Nicolet high-voltage pulse waveform analysis systems, etc.

The company has consistently ranked among the top ten in the comprehensive ranking of the national transformer industry for many years. Its distribution transformers, 110kV and 220kV power transformers rank among the top in the industry's top 10 enterprise rankings. The "Sanmen" brand power transformers enjoy wide recognition and reputation in domestic and international markets. The company's products are widely used in State Grid Corporation of China, China Southern Power Grid, the "Five Large and Four Small" power generation groups, Baosteel Group, Wanhua Chemical, SunPower, Zhejiang Petrochemical and other users, as well as major national projects. They are exported to Africa, Southeast Asia, Europe, America and other countries along the "Belt and Road". The company's products feature stable quality, reliable and safe operation, and have received high praise from domestic and international users. It has successively been awarded the titles of "Strategic Supplier" and "Excellent Supplier" by Taizhou Huatech, SunPower, TBEA, etc.

Adhering to the corporate spirit of "Clean Sanbian, People-Oriented Sanbian, Credit Sanbian, Innovative Sanbian", and centering on the business philosophy of "Creating International High-Quality Goods, Building a 100-Year Sanbian", the company strives to build a high-end equipment manufacturer in the international power transmission and transformation industry, and continuously delivers green, technological, intelligent, environmentally friendly, reliable and efficient products and services for power grid construction at home and abroad.