ZMS Cable and Accessories

The process of armored cable is to add a metal armor layer to the outer sheath of the cable. The following will introduce the outer sheath materials of the armored cable, as well as the structure and use of the outer sheath of the armored cable. 1. Outer sheath material of armored cable 1. Fiber material (1) Paper: Cut from cable paper with a thickness of 0.12 mm. (2) Hemp: cable hemp made of jute. 2. Metal materials The metal materials used in the outer sheath are mainly steel strips, steel wire, aluminum strips (aluminum alloy strips), etc. Steel belt Steel strips are cold-rolled steel strips, painted steel strips, and galvanized steel strips. Cold rolled steel strip It is made of hot-rolled steel strip after cold rolling, and is mainly used for painted steel strips and galvanized steel strips for processing cable armor layers. Painted steel strip It is made by forming paint film on cold rolled steel strip by dip-coating method or electrophoresis method. Specifications and dimension...

  Polyethylene (PE) is widely used for insulation and sheathing of power cables because of its good mechanical strength, toughness, heat resistance, insulation and chemical stability. However, due to the structure of PE itself, it has poor environmental stress cracking resistance, especially when PE is used as the outer sheath of armored cables with large cross-section, the cracking problem is especially prominent. Mechanism of PE sheath cracking PE sheath cracking mainly has the following two cases: one is the environmental stress cracking, refers to the cable after installation and operation, the sheath in the combination of the role of stress or environmental media contact, from the surface of the brittle cracking phenomenon.  This cracking is generally caused by two factors: one is the presence of internal stress in the sheath, and the other is the cable sheath has been in contact with polar liquids for a long time. This cracking mainly depends on the material itself to r...