Control (shielded) cables

Any industrial or domestic facility, and especially a production facility, has a high degree of electrical noise. Electrical noise or electromagnetic interference (EMI) arises from so-called "spurious" or spurious emissions, as well as interference from power supply circuits. The most powerful EMI resonance occurs when switching powerful loads, operating large induction heaters, transformers and high-frequency devices. The insulating coating is "transparent" to any type of electrical interference; its task is to resist mechanical damage. Therefore, the most effective way to combat electromagnetic noise is to equip cable products with special screens (position 4 in the figure).

This protective device prevents the wire from spreading its own electrical noise and protects the cable's own electromagnetic field from the influence of any external interference that could significantly reduce its performance. In addition, shielding can perform some other functions:

• increase the mechanical resistance of the insulating material,
• prevent aggressive external influences,
• ground the electrical network,
• when used in couplings, reduce the likelihood of electrical potentials occurring directly on the outer surface of the product.