Safety
vacon • 4
1
1.3
Earthing and earth fault protection
The VACON
®
20 X AC drive must always be earthed with an earthing conductor connected to
the earthing terminal marked with
.
Since the touch current exceeds 3.5 mA AC, according to EN61800-5-1, the drive shall have a
fixed connection and provision of an additional terminal for a second protective earthing con-
ductor of the same cross-sectional area as the original protective earthing conductor.
Three screws are provided for: the ORIGINAL protective earthing conductor, the SECOND pro-
tective 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 possible options avail-
able.
Figure 1. Protective earthing connections.
CAUTION!
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