PowerFlex 750-Series AC Drives User Manual

1-52 Installation/WiringInstallation Requirements Related to EN 61800-3 and the EMC Directive• The drive must be earthed (grounded) as described in the PowerFlex750-Series User Manual, publication 750-UM001.• Output power wiring to the motor must employ cable with a braidedshield providing 75% or greater coverage, or the cables must be housedin metal conduit, or equivalent shielding must be provided. Continuousshielding must be provided from the drive enclosure to the motorenclosure. Both ends of the motor cable shield (or conduit) mustterminate with a low-impedance connection to earth. At the drive end ofthe motor cable, eithera) The cable shield must be clamped to a properly-installed “EMCplate” for the drive. Kit number 20-750-EMC1-Fx.orb) The cable shield or conduit must terminate in a shielded connectorused in conjunction with a properly-installed conduit plate or conduitbox provided in the “NEMA Type 1 Kit” for the drive. Kit number20-750-NEMA1-Fx.• At the motor end, the motor cable shield or conduit must terminate in ashielded connector which must be properly installed in an earthed motorwiring box attached to the motor. The motor wiring box cover must beinstalled and earthed.• All control (I/O) and signal wiring to the drive must use cable with abraided shield providing 75% or greater coverage, or the cables must behoused in metal conduit, or equivalent shielding must be provided. Whenshielded cable is used, only the drive end of the cable shield should beterminated with a low-impedance connection to earth. The cable shieldmay be terminated either by using a shielded connector in conjunctionwith a conduit plate or conduit box, or the shield may be clamped to an“EMC plate.”• Motor cabling must be separated from control and signal wiringwherever possible.• Maximum motor cable length must not exceed the maximum lengthindicated in Table 1.AH for compliance with radio frequency emissionlimits for the specific standard and installation environment.• EMC cores must be applied to input power and motor cabling for somemodels of the PowerFlex 750-Series drives as indicated in Table 1.AH.• The drive must be powered from an earthed supply system such as a TNor TT system and the PE-A and PE-B jumpers in the drive must beinstalled (see Drive Power Jumper Configuration starting on page 1-23).PowerFlex 750-Series User Manual – Publication 750-UM001C-EN-P – September 2009