Zhejiang Jiangshan Transformer Co., Ltd. (Zhejiang Jiangshan Transformer Factory) is a professional manufacturer of power transformers of 11kV and below designated by the former Ministry of Machinery Industry. It is a national second-class enterprise, a civilized unit in Zhejiang Province and a high-tech enterprise in Zhejiang Province. The trademark of "JSB" Jiangshan Transformer is a famous trademark in Zhejiang Province.