Lenze E931Ex - Manual (Page 21)

Electrical installation
Installation according to EMC (installation of a CE−typical drive system)
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21 GHB 13.0001−EN EN 3.0
5.2 Installation according to EMC (installation of a CE−typical drive system)
Important notes
The electromagnetic compatibility of a machine depends on the type of installation and on
the care that is taken. Special attention should be paid to:
ƒ Assembly
ƒ Shielding
ƒ Grounding
For diverging installations, the conformity to the EMC Directive requires a check of the
machine or system regarding the EMC limit values. This, for instance, applies to the use of
unshielded cables.
The compliance of the machine application with the EMC Directive is in the responsibility
of the user.
ƒ If you observe the following measures, you can assume that the machine will
operate without any EMC problems caused by the drive system, and that compliance
with the EMC Directive and the EMC law is achieved.
ƒ If devices which do not comply with the CE requirements concerning noise
immunity EN 50082−2 are operated close to the controller, these devices may be
electromagnetically disturbed by the controllers.
Design
Contact drive controller extensively to the grounded mounting plate:
ƒ Mounting plates with conductive surfaces (zinc−coated, stainless steel) allow
permanent contact.
ƒ Painted plates are not suitable for installation in accordance with EMC.
ƒ If you use several mounting plates, connect them extensively to one another in a
conductive manner (e. g. by using copper strips).
Shielding
ƒ Connect the shield of the motor cable on the drive controller to the shield
connection of the drive controller.
ƒ Extensively connect the shield in the terminal box on the motor or on the motor
housing to PE:
– Metal glands at the motor terminal box ensure an extensive connection of the
shield and the motor housing.
Earthing
Ground all metallically conductive components (controller, motor filter) using suitable
cables connected to a central earthing point (PE bar).
Maintain the minimum cross−sections prescribed in the safety regulations:
ƒ With regard to EMC, however, not the cable cross−section is important, but the
surface of the cable and the contact with a cross−section as large as possible, i.e.
large surface.