Status quo and development of medium voltage cable accessoriesAddtime：2015/3/27 

along with the acceleration of urbanization and the improvement of people living standards in urban and rural areas, the proportion of cable application in urban distribution network is more and more high.. So as to drive the strong demand of cable accessory products, and promote the speed of product development and improvement.

1 cable accessories

in cable terminations and joints, due to the cable metal sheath and breaking the shielding layer, makes the field distribution over the cable body is much more complicated, in cable terminal field in the presence of an axial stress. Therefore, it is necessary to use cable attached to realize cable continuous and swivel, namely a can meet certain insulation and sealing requirements of a connection device. Cable

conductor, insulation, shielding and protection layer, such as four main structure layer, cable accessories as cable line part of the cable terminal head, the middle joint must be the cable of the four layer structure respectively to get a continuation of the and the conductor is connected well, reliable insulation, good sealing and sufficient mechanical strength, ensure the quality of the cable terminal and cable joint, in order to ensure the cable distribution network power supply reliability.

2 35kV and below medium voltage cable accessories classification

currently, in accordance with the main insulation molding process, common 35kV and below cable terminal and intermediate joint mainly can be divided into winding package type, heat shrinkable, shrinkage and prefabricated and four products commonly used type. There are also products of casting and separable cable accessories for specific products.. Around the

2.1 type cable accessories package wrapped type cable accessories is refers to the insulation and shielding are the use of tape around the package and the cable accessories, the force control method of the stress cone or the use of high dielectric constant stress control tape, the technology level of construction personnel requirements higher, construction technology is more complex, has gradually been eliminated from the scene.

2.2 heat shrinkable cable accessories using with polymer "elastic memory effect" principle, to develop all heat shrinkable tubing, sets of branch, a rain skirt and heat shrink prefabricated parts, according to the procedures set after treatment at the end of the cable or connector, the heat, the contraction of the hoop in the desired position.