The cables we see in our daily life are woven by a brai […]
The cables we see in our daily life are woven by a braiding machine. The cable structure is more complicated. It has a complex sheath. The wire structure is simple. Light protective layer or a light soft protective layer. The conductive core of wire and cable is used to transmit current. In order to reduce power loss and voltage drop, the conductive wire core is generally made of copper and aluminum with high conductivity. The role of the insulation layer is to prevent current leakage in the radial direction and ensure safe use. Therefore, the insulating layer is required to have good electrical insulation properties. Heat resistance and certain mechanical strength.
The main role of wire braiding:
Weaving machine mechanical protection. Such as marine power cable CF31 type.
Withstand longitudinal pull-off force, such as WC-GC, WCT type magnetic measuring cable for marine geological exploration.
Magnetic field shielding.
The role of metal braid
Shielding against electromagnetic interference such as tinned copper wire braided blue cables, copper wire braided control cables, etc.
Eliminate the shielding effect of the surface potential of the power cable. It acts as a general shield for binding power lines and eliminating induced electricity, such as high-voltage cables.
The shielding function of safety protection, braided copper wire outside the main core insulation and good contact with the ground core or used as a ground wire, can reflect the leakage current in time, such as shielded mine cable.
The role of fiber braid:
For wires, the fiber braid is a form of light protective layer. Its main function is to protect the insulation from all kinds of light, heat and moisture. The erosion of low temperature, acid and alkali gas and the damage of external mechanical force ensure the safe operation of the wire. For cables, the fiber braid is often in the middle of the sheath to enhance the tear resistance of the sheath. For example, the reinforced sheath is a cotton or hemp fiber braid in the middle of the rubber or plastic sheath to improve The strength of the sheath.