en/ACS800-04/U4 Hardware Manuals - VAE ProSys sro

52Alternative power cable typesPower cable types that can be used with the drive are represented below.RecommendedSymmetrical shielded cable: three phase conductorsand a concentric or otherwise symmetricallyconstructed PE conductor, and a shieldA separate PE conductor is required if the conductivityof the cable shield is < 50% of the conductivity of thephase conductor.PE conductorand shieldShieldShieldPEPEA four-conductor system:three phase conductorsand a protectiveconductor.PENot allowed for motor cablesShieldNot allowed for motor cables with phaseconductor cross section larger than 10 mm 2[motors > 30 kW (40 HP)].Motor cable shieldTo effectively suppress radiated and conducted radio-frequency emissions, theshield conductivity must be at least 1/10 of the phase conductor conductivity. Therequirements are easily met with a copper or aluminium shield. The minimumrequirement of the motor cable shield of the drive is shown below. It consists of aconcentric layer of copper wires with an open helix of copper tape or copper wire.The better and tighter the shield, the lower the emission level and the bearingcurrents.Insulation jacketCopper wire screenHelix of copper tapeor copper wireInner insulationCable corePlanning the electrical installation