30
Chapter 4 - Connections
XtrapulsCD1-pm
– Installation manual
2 - WIRING RECOMMENDATIONS
(according to EN61000.4-2-3-4-5 and EN55011 standards - see diagram "Shield connection on the
connectors "
– chapter 4, section 2.2).
2.1
– GROUND CONNECTIONS AND LEAKAGE CURRENT
A shield has no effect if it is not connected:
-
to a reference potential,
-
by a connection as short as possible (a few centimeters; 10 centimeters is prohibited),
-
by a "360°" shield connection. This means that the whole circumference of the shield sleeve must be
connected to the reference conduction via a metal collar.
The connectors used for the compliance with the EN61000.4 standard must be made of metal or metallized and
must allow the 360° shield connections.
Reference potential connections (especially with the ground) are recommended
only
these connections have a
very low impedance (< 0,1
). Any shield that is not used as a conductor can be connected at both ends with the
condition to be connected over 360° at both ends by means of metal links in order to ensure the shield continuity.
The reference potential must be the ground.
Cables with low potential should
never
run in the proximity of high power lines.
If there is a potential reference, i.e. a main chassis or cabinet with a low impedance between its different
elements, it should be used to connect ALL reference to it and also being grounded itself.
CAUTION
Each potential conducting element
must be
shielded
. Several potential conductors
in the same sleeve
must
be
twisted and shielded
.
LEAKAGE CURRENT TO THE GROUND
The "Electronic Power Unit" equipment which includes the control, the drive, the motor and the
sensors, generates a leakage current to the ground higher than 30 mA continuous: the protection
conductor section must be
at least
10 mm² (Cu) or 16 mm² (Al).
This product may generate a leakage current with a DC component.
If a Residual Current Device is used, it should be:
- type A in single-phase applications
- type B in three-phase applications
The use of a 300 mA trip current is recommended.