Danfoss VLT AQUA Drive FC 202 Design Manual

Also see for VLT AQUA Drive FC 202: Service guide Installation guide Installation guide Operating guide Installation guide

Contents

3 System IntegrationThis chapter describes the considerations necessary tointegrate the frequency converter into a system design.The chapter is divided into these sections:• Chapter 3.1 Ambient Operating ConditionsAmbient operating conditions for the frequencyconverter including environment, enclosures,temperature, derating, and other considerations.• Chapter 3.3 Mains IntegrationInput into the frequency converter from themains side including power, harmonics,monitoring, cabling, fusing, and other consider-ations.• Chapter 3.2 EMC, Harmonics and Earth LeakageProtectionInput (regeneration) from the frequency converterto the power grid including power, harmonics,monitoring, and other considerations.• Chapter 3.4 Motor IntegrationOutput from the frequency converter to themotor including motor types, load, monitoring,cabling, and other considerations.• Chapter 3.5 Additional Inputs and Outputs,Chapter 3.6 Mechanical PlanningIntegration of the frequency converter input andoutput for optimal system design includingfrequency converter/motor matching, systemcharacteristics, and other considerations.A comprehensive system design anticipates potentialproblem areas while implementing the most effectivecombination of converter features. The information thatfollows provides guidelines for planning and specifying amotor-control system incorporating frequency converters.Operational features provide a range of design concepts,from simple motor speed control to a fully integratedautomation system with feedback handling, operationalstatus reporting, automated fault responses, remoteprogramming, and more.A complete design concept includes detailed specificationof needs and use.• Frequency converter types• Motors• Mains requirements• Control structure and programming• Serial communication• Equipment size, shape, weight• Power and control cabling requirements; typeand length• Fuses• Auxiliary equipment• Transportation and storageSee chapter 3.9 System Design Checklist for a practical guidefor selection and design.Understanding features and strategy options can optimisea system design and possibly avoid introducing redundantcomponents or functionality.3.1 Ambient Operating Conditions3.1.1 HumidityAlthough the frequency converter can operate properly athigh humidity (up to 95% relative humidity), avoid conden-sation. There is a specific risk of condensation when thefrequency converter is colder than moist ambient air.Moisture in the air can also condense on the electroniccomponents and cause short-circuits. Condensation occursin units without power. It is advisable to install a cabinetheater when condensation is possible due to ambientconditions. Avoid installation in areas subject to frost.Alternatively, operating the frequency converter in stand-by mode (with the unit connected to the mains) reducesthe risk of condensation. Ensure the power dissipation issufficient to keep the frequency converter circuitry free ofmoisture.3.1.2 TemperatureMinimum and maximum ambient temperature limits arespecified for all frequency converters. Avoiding extremeambient temperatures prolongs the life of the equipmentand maximises overall system reliability. Follow therecommendations listed for maximum performance andequipment longevity.• Although the frequency converter can operate attemperatures down to -10 °C, proper operation atrated load is only guaranteed at 0 °C or higher.• Do not exceed the maximum temperature limit.• The lifetime of electronic components decreasesby 50% for every 10 °C when operated above thedesign temperature.• Even devices with IP54, IP55, or IP66 protectionratings must adhere to the specified ambienttemperature ranges.System Integration Design GuideMG20N602 Danfoss A/S © 09/2014 All rights reserved. 373 3