3.7.2 IE and IES ClassesComplete drive modules (CDM)According to the standard EN 50598-2, the complete drivemodule (CDM) comprises the drive, its feeding section, andits auxiliaries.Energy efficiency classes for the CDM:• IE0 = below state of the art.• IE1 = state of the art.• IE2 = above state of the art.Danfoss drives fulfill energy efficiency class IE2. The energyefficiency class is defined at the nominal point of the CDM.Power drive systems (PDS)A power drive system (PDS) consists of a complete drivemodule (CDM) and a motor.Energy efficiency classes for the PDS:• IES0 = Below state of the art.• IES1 = State of the art.• IES2 = Above state of the art.Depending on the motor efficiency, motors driven by aDanfoss VLT® drive typically fulfill energy efficiency classIES2.The energy efficiency class is defined at the nominal pointof the PDS and can be calculated based on the CDM andthe motor losses.3.7.3 Power Loss Data and Efficiency DataThe power loss and the efficiency of a drive depend onconfiguration and auxiliary equipment. To get a configu-ration-specific power loss and efficiency data, use theDanfoss ecoSmart tool.The power loss data is provided in % of rated apparentoutput power and are determined according to EN50598-2. When the power loss data are determined, thedrive uses the factory settings except for the motor datawhich is required to run the motor.Tf100%50%50% 90%25%0%0%130BE605.10T Torque-producing current [%]f Frequency [%]Illustration 3.13 Drive Operating Points According to EN50598-2Use the Danfoss ecoSmart application to calculate thepower loss data and efficiency data of the drive at theoperating points, and at the IE and IES efficiency classes.The application is available at ecosmart.danfoss.com.Example of available dataThe following example shows power loss and efficiencydata for a drive with the following characteristics:• Power rating 55 kW (75 hp), rated voltage at400 V.• Rated apparent power, Sr, 67.8 kVA.• Rated output power, PCDM, 59.2 kW (79.4 hp).• Rated efficiency, ηr, 98.3%.Illustration 3.14 and Illustration 3.15 show the power lossand efficiency curves. The speed is proportional to thefrequency.System Integration Design GuideMG03M302 Danfoss A/S © 12/2018 All rights reserved. 373 3