Install Instructions

S1A53832 03/2019 67
Electromagnetic compatibility (EMC)
NOTE: The high frequency equipotential ground connection between the drive, motor, and cable shielding does
not eliminate the need to connect the ground (PE) conductors (green-yellow) to the appropriate terminals on
each unit.
Principle and precautions
 Grounds between the drive, motor, and cable shielding must have high frequency equipotentiality.
 When using shielded cable for the motor, use a 4-conductor cable so that one wire will be the ground
connection between the motor and the drive. Size of the ground conductor must be selected in compliance
with local and national codes. The shield can then be grounded at both cable ends. Metal ducting or conduit
can be used for part or all of the shielding length, provided there is no break in continuity.
 When using shielded cable for Dynamic Brake (DB) resistors, use a 3-conductor cable so that one wire will
be the ground connection between the DB resistor assembly and the drive. The size of the ground conductor
must be selected in compliance with local and national codes. The shield can then be grounded at both cable
ends. Metal ducting or conduit can be used for part or all of the shielding length, provided there is no break in
continuity.
 When using shielded cable for control signals, if the cable is connecting equipment that is close together and
the grounds are bonded together, then both ends of the shield can be grounded. If the cable is connected to
equipment that may have a different ground potential, then ground the shield at one end only to help prevent
large currents from flowing in the shield. The shield on the ungrounded end may be tied to ground with a
capacitor (for example: 10 nF, 100 V or higher) in order to provide a path for the higher frequency noise. Keep
the control circuits away from the power circuits. For control and speed reference circuits, we recommend
using shielded twisted cables with a pitch of between 25 and 50 mm (1 and 2 in.) Keep the control circuits
away from the power circuits.
 Ensure maximum separation between the power supply cable (line supply) and the motor cable.
 The motor cables must be at least 0.5 m (20 in.) long.
 Do not use surge arresters or power factor correction capacitors on the variable speed drive output.
 If using an additional input filter, it should be mounted as closed as possible to the drive and connected directly
to the line supply via an unshielded cable. Link on the drive is via the filter output cable.
 For installation of the EMC plate and instructions for meeting IEC 61800-3 standard, refer to the section
entitled “Installing the EMC plates”.
Mains impedance
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION OR ARC FLASH
 Do not expose cable shielding except where connected to ground at the metal cable glands and underneath
the grounding clamps.
 Ensure that there is no risk of the shielding coming into contact with live components.
Failure to follow these instructions will result in death or serious injury.
NOTICE
RISK OF LIFE DURATION AND EMC PERFORMANCES DECREASE
 Do not connect the drive to a low impedance network.
 The input withstand current must not exceed the value in the table defined in the ATV212 Quick Start Annex
document, reference S1A73476 provided with the product.
 Installation and supply greater than this value will require an additional inductance.
Failure to follow these instructions can result in equipment damage.