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The function and difference of wire&cable braid layer

January 4, 2021

Latest company news about The function and difference of wire&cable braid layer

Conductors of electric wires and cables are used to carry electric current.
In order to reduce the power loss and voltage drop, the conductor core is generally made of copper and aluminum with high conductivity.
The role of insulation layer is to prevent current leakage along the radial, ensure the safety of use.
Therefore, the insulation layer is required to have good electrical insulation performance.
Heat resistance and certain mechanical strength.
Wire and cable braiding mainly consists of three basic structural elements: fiber braiding layer, metal braiding layer and steel wire braiding.

One, fiber braid layer

For wires, the braided layer is a form of its light protective layer.
Protects the insulation from or against all kinds of light, heat, and moisture.
Low temperature, acid and alkali gas erosion and external mechanical force damage to ensure the safe operation of the wire.
For cables, the fiber braid layer is often in the middle of the sheath, so as to enhance the tear strength of sheath. For example, the reinforced sheath is in the rubber or plastic sheath into the middle of cotton yarn, hemp fiber braid layer, in order to improve the sheath strength.

 

II, steel wire weaving

1.Mechanical protection of weaving machine.
Such as Marine power cable CF31.

2.Withstand longitudinal tensile forces, such as WC-GC and WCT type magnetic cable used in Marine geological exploration.

3.Magnetic shielding.
From the point of view of wire and cable sheath, braid is one of many kinds of wire and cable sheath or outer sheath.
However, according to the material used in the wire and cable braid layer and the different parts of the braid layer in the wire and cable structure, the role of braid layer is obviously different

 

Iii. Metal braid layer

There are two kinds of metal braiding machine layers: copper wire braiding layer and steel wire braiding layer.

1. Shield against electromagnetic interference, such as blue cable braided by tinned copper wire, control cable braided by copper wire, etc.

2. Eliminate the shielding effect of power cable surface potential.
It shackles power lines and eliminates the total shielding of inductive electricity, such as high voltage cables.

3. Shielding effect of security protection.
Braided copper wire outside the insulation of the main core and in good contact with the ground core or used as ground wire can reflect the leakage situation in time, such as shielded mine cable.

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