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Zhejiang Tenglong Electrical Apparatus Co. Ltd. which was founded in 1978 is located on Sanmen bay of East China Sea. It is one of the earliest Companies in designing and manufacturing tap changers for transformers. With the abundant experience in design and manufacture of transformer components for years, and the Combinations of High-Scientific theory and Modern design theory in practice, as a result Tenglong has obtained lot patents for those reasons we have mentioned above. And this is also one of the key reasons why Tenglong has excellent quality products and become the main supplier for transformer tap changers in China. People oriented and honesty is the everlasting motto for all Tenglong People. And Tenglong people are famous for their hard struggle and Creative minds, thus enable Zhejiang Tenglong Electrical Apparatus Co. Ltd. Of zhejiang walk on the right track to the sustainable development.

Tenglong company , with a registered capital of 6470,000 RMB, covers an area of 102 acres.Our company has equipped with advanced production and test facilities; It also has strong technical force in design and manufacture of tap-changer. The annual output of Tenglong is often on the precedent place among all tap changer manufacturers in china. Furthermore, Tenglong passed through ISO9001:2008 quality management system. For the excellent quality of our products, Tenglong tap changers have been selling well in domestic and abroad, each year we would have certain quantities of tap changer sold abroad and our products has gained more and more reputations among our customers abroad. At the same time, Zhejiang Tenglong has awarded the prize of Grade AA "Integrity on contract and credit " of Zhejiang Industrial and Commercial Enterprise unit, " Sci-tech Enterprise of Zhejing Province", "High-tech Enterprise of Zhejiang Province ".

Tenglong is the trademark of our products, we have 40 series and thousands kinds of types. The main products are as follows: