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The main direction of the copper strip shielding current is the same as that of the copper strip

Update:03-09-2019
Summary:

Let us understand that the shielding layer is mainly re […]

Let us understand that the shielding layer is mainly resistant to external electromagnetic interference, preventing the interference of the electromagnetic field generated by itself and the fault current through the electromagnetic field generated by itself.

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

The main direction of the copper strip shielding current is the same as that of the copper strip. The path of the current flowing through the copper wire shield is short, the heat is emitted less, and the shield is cut by two layers of copper strips. The current is reduced and the amount of heat emitted is also reduced. It can also play the role of shielding signal. However, for 500mm load current, the electromagnetic field generated by itself is also larger. When the short-circuit current exceeds a certain value, the effective cross-section value of the two-layer 0.12mm copper strip cannot reach the copper wire. A relatively large effective section value that can be achieved by sparse winding.

From the above comprehensive considerations, the shielding effect of copper wire is much better than other shielding methods, and the continuity is relatively reliable, and copper wire shielded cable can be selected. However, depending on the construction plan and the laying environment, the use rate of the copper-shielded shielded cable is also high. Customers should choose according to the actual situation and order.

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