ISO INTERNATIONAL STANDARD 12759-2 First edition 2019-03 Fans Efficiency classification for fans Part 2: Standard losses for drive components Ventilateurs-Classification du rendement des ventilateurs - Partie2:Déterminationdchargepartielle Reference number IS012759-2:2019(E) OS1 @ IS0 2019 IS0 12759-2:2019(E) COPYRIGHTPROTECTEDDOCUMENT IS02019 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting below or ISo's member body in the country of the requester. ISO copyright office CP 401: Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 0111 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved IS012759-2:2019(E) Contents Page Foreword .iv Introduction 1 Scope. 1 2 Normativereferences 1 3 Terms, definitions and symbols .1 3.1 Terms and definitions 1 3.2 Symbols. 2 Fan systemefficiencycalculations .3 4.1 General. 3 4.2 Components 3 4.2.1 Fan 3 4.2.2 Power transmission. 3 4.2.3 Motorand controller 4 4.3 System integration. 6 5 Reportingofresults .6 AnnexA(informative)Fansystempowerlosses 8 AnnexB (informative)EPCAnominalmotorefficiency(6oHzmotors) .9 AnnexC (informative)IEC60034-30-1nominalmotorefficiencyat50Hz .10 ..14 Annex D (informative) Nominal motor efficiency according to Reference [Z] for China AnnexE (normative) Horsepower rated polyphaseinduction motor performance constants whenfed from VFD 15 Annex F (normative) Kilowatt rated polyphase induction motor performance constants whenfedfromVFD .16 AnnexG(normative)HorsepowerratedvFDperformanceconstants .17 AnnexH (normative)Kilowattrated VFDperformanceconstants. .18 Annex I (normative) Polyphase induction motor performance constants (DoL, hp rated motors)19 Annex J (normative) Polyphase induction motor performance constants (DoL, kW rated motors) .20 Bibliography .21 @IS0 2019- All rights reserved iii