In general, control equipment is required to meet a number of relevant EMC standards. The important issue, being that documents are available to prove compliance. The mere statement that good engineering practice and CE marked components being used is not sufficient. We work in conjunction with a third party test consultant to provide a fully compliant, tested system, which meets all current requirements. Verification by a third party using calibrated test equipment, and subsequently providing documented evidence of test results is considered as essential by many clients. This can be carried out either at our works, the EMC test vendor’s labs, or on site on completion of installation. Typically the following tests would be performed on a control panel;
The test data would be structured for the new EMC Directive 2004/108/EEC which is applicable from 20 July 2007.
The following standards are be used as a basis for the tests:
• EN61000-6-2: 2005 Immunity requirements for Industrial environment
• EN61000-6-4: 2001 Emission requirements for Industrial environment
• EN61000-4-4: 2004 Fast Transient Burst Immunity
• EN61000-4-2: 2001 Static Discharge Immunity
• EN61000-4-5: 1995 Surge
• EN61000-4-11: 2004 Power Quality test
• EN61000-3-2: 2001 Harmonic emissions
• EN61000-3-3: 1995 Flicker
The EMC Directive, issued by the European Commission, is a mandatory requirement in all EU member states. This creates a level playing field across the union. The Directive 89/336/EEC was originally issued in 1992, and updated in 2004 as 2004/108/EC. These are 'New Approach' directives. This means that they simply set down the basic legal requirements and leave all the technical detail to specialist European standards bodies such as CENELEC, ETSI and CEN.
The essential requirements are:
• Must comply with the appropriate standards.
• The manufacturer/importer has the responsibility for ensuring compliance.
• Suitable person within the responsible organisation must sign the Declaration of Conformity.
• Evidence of compliance must be retained.
• Products must be marked with the CE compliance logo.