4
Electrical installation
24
Festo – GDCP-CMMD-AS-HW-EN – 1404NH – English
4.2
Instructions for safe and EMC-compliant installation
The CMMD-AS-C8-3A motor controllers have been approved in accordance with product
standard EN 61800-3 that is applicable to electric drives. Components from Festo have
been used for this purpose (e.g. motor/encoder cables).
The declaration of conformity for the EMC directive (electromagnetic compatibility) is
available at
www.festo.com.
4.2.1
Interference emission and resistance to interference
In order to increase the resistance to interference and decrease the emitted interference, the CMMD-
AS-C8-3A motor controller already has integrated motor chokes and mains filters, which means that the
motor controller can be operated without additional shielding and filters in most applications.
If installed correctly and if all connecting cables are wired correctly (
Chap. 4.2.2), the motor control-
ler fulfils product standard EN 61800-3 for the following range of application:
Permissible range of application
Emitted interference
Second environment (industrial)
1)
Resistance to interference
Second environment (industrial)
1)
1)
Locations outside of the residential area, or industrial areas that are supplied from the medium-voltage power supply network
through their own transformer.
Tab. 4.1
Permissible range of application in accordance with EN 61800-3
Please note
The built-in filter can be thermally overloaded if an application involves long motor
cables (15 … 25 m) or motor cables with an impermissible high cable capacity:
•
Use additional filters for cables 15 … 25 m long (see Tab. 4.2).
•
Only use cables with a capacitance per unit length of
<
200 … 150 pF/m between the
motor phase and screening; contact the cable supplier if necessary.
category
EN 61800-3
Motor cable
length [m]
Filter (at the output)
C3
1)
< 15
None
15 … 25
Ferrite core via motor cable (Ferroxcube TX26/15/20 3C90)
•
Feed each of the 3 motor phases through the ferrite core twice in
the same direction
3 x 2 windings on the inside of the ring core.
•
Do not feed the PE wire through the ferrite core.
1)
C3: Power drive systems with nominal voltages < 1000 V for exclusive use in the second environment.
Tab. 4.2
Additional EMC filter
