This series of product is used the short net system of submerged arc furnace (such as carbide furnace, ferroalloy furnace, industrial silicon furnace, yellow phosphorus furnace, etc.). It is not only used for connecting the secondary outlet terminal of the transformer with the fixed copper tube (Type A connector of the compensator can be used for arc furnace or ladle furnace compensator ), but aslo used for water-cooling cable connecting the fixed copper tube with the movable copper tube in the furnace (connecting with the contact shoes ). Wherein, type A connector (single nut connector ) and type B connector (hough connector ) are applicable to connecting the coppertubes; type C connector (plate connector ) is applicable to connecting the copper bar with the outlet terminal on the top of the transformer.