Appendix A – Technical DataACA 635 IGBT Supply Sections A-5Harmonic Distortion This table gives total harmonic distortion (THD) of the ACA 635.DefinitionsTHD is calculated as follows: ratio of the rms value of the harmonics (n= 2...40) to the rms value of the fundamental. The voltage THDdepends on the short-circuit ratio. The spectrum of the distortion alsocontains interharmonics. See also Applicable Standards.Ratio of the short-circuit power of the supply network (source) to thefundamental apparent power of the ACA 635 at point of commoncoupling:Rsc = Scc/Sequ , whereScc = short-circuit power at point of common coupling (PCC),Sequ = apparent power of the equipment calculated with rated rms linecurrent.Switching Frequency 2 kHz (average).Ambient Conditions See ACS 600 MultiDrive Safety and Product Information (EN code:63982229) guide or ACx 6x7 Hardware Manual (EN code: 61329005).Efficiency 97 % at nominal power levelTHDVoltage%THDCurrent%Rsc8 4 202 4 100THD IIn= æèç öø÷å 12240Total Harmonic Distortion:In n th harmonic componentI1 fundamental current
