What is the role of the shielding layer of low smoke halogen free shielded cable?

I. What is the role of the shielding layer of low-smoke halogen-free shielded cable? The shielding layer is divided into two parts: inner shielding and outer shielding. They are in order to make the cable conductor and insulation layer, cable insulation layer and the inner protective layer have good contact, to eliminate the conductor surface and the inner protective layer surface is not smooth caused by the increase in the strength of the surface electric field, generally in the surface of the conductor wrapped in metallized paper tape (thickness of 0.12mm cable low side, affixed with a thickness of 0.014mm aluminum foil and rubber-plastic cables, and the thin copper skin) or semiconductor paper tape. Shielded control cable is a mesh layer of copper or metal wire braided and surrounded by one or more wires of the cable, this layer of mesh line can prevent lightning strikes, external signals can not interfere with it. Low-smoke halogen-free shielded cable shield can also play a certain role in leakage protection.

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