5.4 Connecting to Ground
WARNING
LEAKAGE CURRENT HAZARD
Leakage currents exceed 3.5 mA. Failure to ground the drive properly can result in death or serious injury.
•
Ensure the correct grounding of the equipment by a certied electrical installer.
For electrical safety
•
Ground the drive in accordance with applicable standards and directives.
•
Use a dedicated ground wire for input power, motor power, and control wiring.
•
Do not ground 1 drive to another in a daisy chain fashion.
•
Keep the ground wire connections as short as possible.
•
Follow motor manufacturer wiring requirements.
•
Minimum cable cross-section: 10 mm
2
(6 AWG) (or 2 rated ground wires terminated separately).
•
Tighten the terminals in accordance with the information provided in chapter 10.8.1 Fastener Torque Ratings.
For EMC-compliant installation
•
Establish electrical contact between the cable shield and the drive enclosure by using metal cable glands or by
using the clamps provided on the equipment.
•
Reduce burst transient by using high-strand wire.
•
Do not use twisted shield ends (pigtails).
NOTICE
POTENTIAL EQUALIZATION
There is a risk of burst transient when the ground potential between the drive and the control system is dierent.
Install equalizing cables between the system components. Recommended cable cross-section: 16 mm
2
(5 AWG).
Electrical Installation Operating Guide
MG21A502 Danfoss A/S © 09/2018 All rights reserved. 27
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