Guizhou changzheng electric Co., Ltd., formerly known as Changzheng electric appliance No.1 factory, is a leading enterprise specializing in the research, development and manufacturing of on-load tap changer and unexcited tap changer for transformers. Since 2018, it has been a subsidiary of Huaming Power Equipment Co., Ltd.(SZ.002270).Company independent research and development since the beginning in the 1970 s, transformer tap-changer is introduced in 1984, a full range of manufacturing technology, through the digestion, absorption, innovation, development with independent intellectual property rights ZVMD, ZVM, ZVV, ZMD, ZMT, ZMB, ZM, ZV tap-changer series products reached the international advanced level, and won the title of national and provincial famous brand product.The company invested 350 million yuan to build the new plant has been put into use, has been built into the country's largest tap switch production base.
Hanglong focuses on the production of shunts
, electrical connections and other electrical components,is the main supplier of Guizhou Changzheng.The contact
is one of the key components of the switch electrical appliances. The main performance and life of the switch electrical appliances depend on the quality of the contact
materials to a large extent.With its unique research and development system and material supply chain system, the company produces contact
products with good electrical conductivity, high arc erosion resistance and material transfer resistance, which helps Changzheng electric to maintain its leading position in the high-threshold uhv on-load tap changer market and break foreign monopoly.