Safety
vacon • 7
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
1
1.5
Grounding and earth fault protection
The VACON
®
20 X AC drive must always be grounded with a grounding conductor connected to the
grounding terminal marked with
.
Since the touch current exceeds 3.5 mA AC (for the three-phase version), according to EN61800-5-
1, the drive must have a fixed connection and provision of an additional terminal for a second pro-
tective grounding conductor of the same cross-sectional area as the original protective grounding
conductor.
Three screws (for the three-phase version) are provided for: the ORIGINAL protective grounding
conductor, the SECOND protective conductor and the MOTOR protective conductor (the customer
can choose the screw for each one). See Figure 1 for the location of the three screws in the two pos-
sible options available.
Figure 1. Protective grounding connections MU2 and MU3, three-phase version.
CAUTION!