Baoding Tianwei Hengtong Electric Co., Ltd was established on May, 2003. It is a national high-tech enterprise, software enterprise, outstanding innovation enterprise and pioneering enterprise which has passed ISO9001 quality management system certification, with over 40 product patents and software copyrights as well as national test certificates for all kinds of products. We are domestic well-known and professional manufacture on electric system neutral protection equipment. Our leading products and core technology are in the domestic leading position. The neutral grounding series products are in the first brand in China. We have our own factory of production workshop which covers an area of 30000 square meters and there are more than 200 employees. Each production line will be strictly quality controlled by professional technical person, and the finished products will be strictly inspected in order to ensure the good performance.