Cable shielding layer, copper wire VS copper tape, which is better?

Let us understand that the cable shielding layer is mainly used to resist external electromagnetic interference and prevent the electromagnetic field generated by itself during the use of the surrounding environment and the fault current.

According to the requirements for the shielding performance of the application, the selected materials are different, such as copper wire braided shield, copper tape wrapped shield, copper wire sparsely wound shield, aluminum alloy wire braided shield, copper clad aluminum wire braided shield, aluminum-plastic composite With wrapping shielding and so on. Among them, in order to ensure the continuity of the shielding layer, to reduce the transfer impedance of the shielding layer, wrapping copper tape, aluminum-plastic composite tape wrapping usually requires one or more annealed copper wires to be placed longitudinally in the cable shielding layer As a drainage line.

The main direction of the copper tape shielding current is the same as the spiral shape of the copper tape. The copper wire shielding the current through the path is short and the heat emitted is less, and the two layers of copper tape shielding, the shielding cross-sectional area increases, and the flow through As the current decreases, the amount of heat emitted also decreases. It can also play a role in shielding the signal. But for the larger current carrying capacity of 500mm2, the electromagnetic field generated by itself is also larger. When the short-circuit current exceeds a certain value , The effective cross-section value of 0.12mm copper tape with two layers cannot reach the relatively large effective cross-section value that can be achieved by copper wire sparse winding.

From the above comprehensive considerations, the copper wire shielding effect is much better than other shielding methods, and the continuity is more reliable, you can choose the copper wire shielded cable.

However, depending on the construction plan and laying environment, the utilization rate of copper tape shielded cables is also very high. Customers should select and order according to the actual situation.