Sanmen Haiwei Electric Co., Ltd., located on the coast of Sanmen Bay in the eastern part of Zhejiang Province, China, was established in 2002. As one of the pioneering domestic manufacturers who specializes in the design, research and development, production, and sales of high-voltage load switches. The company has dedicated over 20 years to this product category, consistently investing in research and iterating its offerings.Currently, Haiwei Electrical produces the BFY series of oil-immersed two-position and four-position high-voltage load switches, specifically designed for combined transformers with a rated voltage of 40.5kV and below. These switches are complemented by insulating operating rods.

Since its inception, the company has upheld the core values of "Higher Technology, Better Quality, and More Satisfied Customers." Committed to delivering high-quality products, specialized technology, and top-tier service, they consistently offer customers excellent products and comprehensive services. The company prides itself on its advanced production and testing equipment, with the entire manufacturing process strictly adhering to customer requirements and relevant legal regulations, surpassing national standards in technical indicators.

Having obtained ISO 9001 quality management system certification, the company ensures stable and reliable product quality. It has established long-term cooperative relationships with customers in the Americas, Oceania, and other regions, rendering its products popular both domestically and internationally.