Led by Mr. Zhang Haijie, Chairman of Dalian Powtran Technology Co., LTD., the invention of "a DC contactor auxiliary contact structure used in frequency converter" was awarded the utility model patent certificate by the State Intellectual Property Office of the People's Republic of China on December 13, 2022. Patent number: ZL 2022 2 2122442.6.

Since its establishment, Powtran Technology attaches great importance to the summary and innovation of frequency converter technology, has developed a number of scientific and technological achievements, and obtained a number of patent authorization, these patent technologies are the crystallization of our company's active practice and exploration, in practical application to solve the technical problems, for our company to improve product quality, reduce operation and maintenance costs, energy saving and efficiency provides technical support.