Rockwell Automation RELIANCE ELECTRIC SP500 - E.3.2 Motor Leads

E.3.2
E.3.3
E.3.4
Motor Leads
The motor leads must be run in continuous, rigid, conductive conduit,
continuously-screened armored cable, or equivalent. Note that the use of flexible
metal conduit, open wire, or wire in trays is not acceptable. Many flexible metal conduit
products have not been designed for RF containment and are not adequate to
maintain compliance.
All motor leads should have the same cross-sectional area. The maximum allowable
motor lead length from the drive to the motor is 76 m (250 feet).
A ground (earth) lead, equivalent in size to the motor leads, must be run with the
motor leads from the motor to the drive. Terminate this lead in the drive at the ground
terminal.
Proper glands must be used to terminate the motor conduit/cable. The gland must
secure the cable screen to the conductive surfaces of the drive and motor. A full 360°
screen termination is preferred.
Follow all instructions supplied with the motor.
Connecting AC Input Power to the AC Mains Filter
Connect AC input power to the filter by first removing the filter’s cover and then
connecting the AC input power leads to the terminals at the top of the filter. See figure
E.1.The AC input power leads should have lugs attached. The filter has a conduit
opening to secure the AC input power conduit.
Grounding the Drive/Filter Assembly
Connect the drive/filter assembly to earth ground at the terminal provided next to the
filter’s AC input power terminals. Size the ground wire per EN-60204-1, Part 5.2! | for
copper conductors and EN-60204-1, Part 8.2.2.2 , for non-copper conductors.
European Union standards require that the ground wire must be green/yellow
according to EN-60204-1, Part 15.2.2.3
TEN-60204-1, Part 5.2: Minimum Cross-Sectional Area of the External Protective
Copper Conductor
Cross-Sectional Area of Phase
Conductors Supplying the Minimum Cross-Sectional Area of the
Equipment (S) (mm?) External Protective Conductor (mm?)
S$ <16 S
16<S$<35 16
S >35 S/2
2EN-60204-1, Part 8.2.2.2: Protective Conductors
Copper conductor should be used. If a material other than copper is used, its electrical
resistance per unit length should not exceed that of copper. Non-copper conductors
should not be less than 16 mm in cross-sectional area.
E-6 SP500 AC Drive Installation and Operation Manual Version 3.1