Safety
vacon • 7
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
1
1.5
Grounding and earth fault protection
The VACON
®
100 X AC drive must always be earthed with a grounding conductor connected to the
grounding terminal marked with
.
See Table 16 and Table 17 for the required cross-section of phase conductor and protective ground-
ing conductor (both made of copper).
Since the touch current exceeds 3.5 mA AC, according to EN61800-5-1, the MM4 and MM5 must
have a fixed connection and provision of an
additional terminal for a second protective grounding
conductor
of the same cross-sectional area as the original protective grounding conductor. MM6
must have a fixed installation and a cross-section of the protective grounding 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 grounding conductors: the customer can choose the screw for
each one.
The cross-sectional area of every protective grounding conductor which does not form a part of the
supply cable or cable enclosure must, 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
must be made so that the protective grounding conductor in the cord is, in the case of failure
of the strain-relief mechanism, 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!
