2.7.3 High and Low Feedback Warning 34
2.7.4 Phase Imbalance or Phase Loss 34
2.7.5 High Frequency Warning 34
2.7.6 Low Frequency Warning 34
2.7.7 High Current Warning 34
2.7.8 Low Current Warning 34
2.7.9 No Load/Broken Belt Warning 34
2.7.10 Lost Serial Interface 34
2.8 User Interfaces and Programming
34
2.8.1 Local Control Panel 35
2.8.2 PC Software 35
2.8.2.1 MCT 10 Set-up Software 36
2.8.2.2 VLT
®
Harmonics Calculation Software MCT 31 36
2.8.2.3 Harmonic Calculation Software (HCS) 36
2.9 Maintenance
36
2.9.1 Storage 37
3 System Integration
38
3.1 Ambient Operating Conditions
38
3.1.1 Humidity 38
3.1.2 Temperature 38
3.1.3 Cooling 39
3.1.4 Motor-generated Overvoltage 40
3.1.5 Acoustic Noise 40
3.1.6 Vibration and Shock 40
3.1.7 Aggressive Atmospheres 40
3.1.8 IP Rating Denitions 42
3.1.9 Radio Frequency Interference 42
3.1.10 PELV and Galvanic Isolation Compliance 43
3.1.11 Storage 43
3.2 EMC, Harmonics and Ground Leakage Protection
44
3.2.1 General Aspects of EMC Emissions 44
3.2.2 EMC Test Results 45
3.2.3 Emission Requirements 48
3.2.4 Immunity Requirements 48
3.2.5 Motor Insulation 49
3.2.6 Motor Bearing Currents 49
3.2.7 Harmonics 50
3.2.8 Ground Leakage Current 52
Contents Design Guide
MG20N622 Danfoss A/S © 09/2014 All rights reserved.