1
vacon • 5 Safety
1.5 Earthing and earth fault protection
The VACON
®
100 X AC drive must always be earthed with an earthing conductor connected to the
earthing terminal marked with .
See Table 12 and Table 13 for the required cross-section of phase conductor and protective earth-
ing conductor (both made of copper).
Since the touch current exceeds 3.5 mA AC, according to EN61800-5-1, the MM4 and MM5 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 protective earthing conductor. MM6
shall have a fixed installation and a cross-section of the protective earthing conductor of at least 10
mm
2
Cu.
On the terminal-box, three screws (for MM4 and MM5) and two screws (for MM6)are provided for
ORIGINAL and MOTOR protective earthing conductors: the customer can choose the screw for each
one.
The cross-sectional area of every protective earthing conductor which does not form a part of the
supply cable or cable enclosure shall, in any case, be not less than:
•2.5 mm
2
if mechanical protection is provided or
•4 mm
2
if mechanical protection is not provided. For cord-connected equipment, provisions
shall be made so that the protective earthing conductor in the cord shall, in the case of fail-
ure of the strain-relief mechanism, be the last conductor to be interrupted.
The power-head is earthed through metal aglets, located on the terminal-box, which fit into spring
baskets on the powerhead. See Figure 1, Figure 2 and Figure 3 for the location of the screws (three
for MM4 and MM5, two for MM6) and the metal aglets (one for MM4 and MM5, two for MM6). Please,
pay attention not to damage or remove these aglets.
CAUTION!
To Next Page
Loading...
Need help?
General
