Cold resistant shielded control cable shield material and role?

I. Cold shielded control cable shielding material and role? The color of the insulation core of the cold shielded control cable is generally black printed white, and power cables are generally low voltage color. Control cable cross-section is generally not more than ten square, power cable is mainly to transport electricity, are generally large cross-section. From the cable core number, power cable according to the requirements of the power grid, generally 5 cores, while the control cable transmission of control signals, the number of cores is more. Cold shielded control cable shield is a cable product in the electromagnetic field and the external electromagnetic field to isolate the components, can prevent the use of the process due to its own electromagnetic field generated by the surrounding environment of the interference and the role of through fault current. According to the different occasions of cable use, the cable shielding layer of the selected materials are different, which, more commonly used is copper wire shielding and copper tape shielding. Role is for no metal sheath of low-voltage power cables, in addition to setting up a semi-conductive shielding layer, but also to increase the metal shielding layer, metal shielding layer is usually made of copper tape or copper wire wrapped around, mainly play a role in shielding the role of the electric field.

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