C.1.2 EMC Conformity and CE marking
The information contained herein is for your guidance only and does not guarantee that the installation will meet the requirements of the council directive 89/336/EEC.
The purpose of the EEC directives is to state a minimum technical requirement common to all the member states within the European Union. In turn, these minimum technical requirements are intended to enhance the levels of safety both directly and indirectly.
Council directive 89/336/EEC relating to Electro Magnetic Compliance (EMC) indicates that it is the responsibility of the system integrator to ensure that the entire system complies with all relative directives at the time of installing into service.
Motors and controls are used as components of a system, per the EMC directive. Hence all components, installation of the components, interconnection between components, and shielding and grounding of the system as a whole determines EMC compliance.
The CE mark does not inform the purchaser which directive the product complies with. It rests upon the manufacturer or his authorized representative to ensure the item in question complies fully with all the relative directives in force at the time of installing into service, in the same way as the system integrator previously mentioned. Remember, it is the instructions of installation and use, coupled with the product, that comply with the directive.
C.1.3 Use of CE compliant components
The following points should be considered:
HUsing CE approved components will not guarantee a CE compliant system!
HThe components used in the drive, installation methods used, materials selected for interconnection of components are important.
HThe installation methods, interconnection materials, shielding, filtering and grounding of the system as a whole will determine CE compliance.
HThe responsibility of CE mark compliance rests entirely with the party who offers the end system for sale (such as an OEM or system integrator).
C.1.4 EMC wiring technique
Cabinet
Using a typical electroplated zinc coated enclosure, connected to ground, means that all parts mounted on the back plane are connected to ground and all shield (screen) connections can be connected to ground. Within the cabinet there should be a spatial separation between power wiring (motor and AC power cables) and control wiring.
Screen connections
All connections between components must use shielded cables. The cable shields must be connected to the enclosure. Use conductive clamps to ensure good ground connection. With this technique, a good ground shield can be achieved.
