Contents
Contents Page
Cont.11
Chapter 12 CERTIFICATION FOR THE INVERTER
Requirements for EMC Compliance ............................................................12-1
Minimising Radiated Emissions ..............................................................................12-1
Earthing Requirements...........................................................................................12-1
• Protective Earth (PE) Connections .........................................................12-1
• EMC Earth Connections ......................................................................12-1
Cabling Requirements ...........................................................................................12-2
• Planning Cable Runs...........................................................................12-2
• Increasing Motor Cable Length............................................................12-2
EMC Installation Options.......................................................................................12-3
• Screening & Earthing (wall mounted, Class A) ......................................12-3
• Screening & Earthing (cubicle mounted, Class B) ..................................12-3
• Star Point Earthing ..............................................................................12-5
• Sensitive Equipment ............................................................................12-6
Requirements for UL Compliance ...............................................................12-7
• Solid-State Motor Overload Protection .................................................12-7
• Short Circuit Rating .............................................................................12-7
• Solid-State Short-Circuit Protection.......................................................12-7
• Recommended Branch Circuit Protection..............................................12-7
• Motor Base Frequency.........................................................................12-7
• Field Wiring Temperature Rating .........................................................12-7
• Field Wiring Terminal Markings...........................................................12-7
• Power Wiring Terminals ......................................................................12-7
• Terminal Tightening Torque ................................................................12-7
• Field Grounding Terminals..................................................................12-8
• Operating Ambient Temperature .........................................................12-8
• Direct Wall-Mountable Models ............................................................12-8
European Directives and the CE Mark........................................................ 12-9
CE Marking for Low Voltage Directive ....................................................................12-9
CE Marking for EMC - Who is Responsible? ...........................................................12-9
• Legal Requirements for CE Marking...................................................12-10
• Applying for CE Marking for EMC......................................................12-10
Which Standards Apply?......................................................................................12-10
• Power Drive Product Specific or Generic Standards.............................12-10
Certificates .........................................................................................................12-16
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