Vacon 20 CP, Installation, Technical And Maintenance Manual

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1
vacon • 7 Safety
1.6 Earthing and earth fault protection
The VACON
®
20 CP 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 (for the three-phase version), according to
EN61800-5-1, the drive shall have a fixed connection and provision of an additional terminal for
a second protective earthing conductor of the same cross-sectional area as the original pro-
tective earthing conductor.
Three screws (for the three-phase version) are provided for: the ORIGINAL protective earthing
conductor, the SECOND protective conductor and the MOTOR protective conductor (the cus-
tomer can choose the screw for each one). See Figure 1 for the location of the three screws in
the two possible options available.
Figure 1. Protective earthing connections MS2 and MS3, three-phase version.
In VACON
®
20 CP, the phase conductor and the corresponding protective earthing conductor
can be of the same cross-sectional area, provided they are made of the same metal (because
the cross-sectional area of the phase conductor is less than 16 mm
2
).
CAUTION!