Metal Shielding And Shielding Layer Grounding

Metal shielding is an important measure to weaken and prevent electrical interference, including the general shielding, sub-shielding and double-layer general shielding. The choice of metal shielding type of cable should be considered according to the strength of possible electrical interference, and included in the comprehensive measures to suppress interference, so as to meet the requirements of reducing interference and overvoltage. The higher the requirement of anti-interference effect is, the greater the corresponding investment will be. When the steel tape armored and steel wire braided total shield is adopted, the price of the cable will increase by about 10%~20%. The control interference in the strong power circuit, due to its own signal is strong, so in addition to located in the uhv distribution device or parallel with the high voltage cable is long, can choose the control cable without metal shield.