ISO INTERNATIONAL STANDARD 20958 First edition 2013-08-15 Condition monitoring and diagnostics of machine systems Electrical signature analysis of three-phase induction motors Surveillanceetdiagnosticdessystemesdemachines-Analysedela signature électrique desmoteurs triphasés a induction Reference number IS0 20958:2013(E) LSO Copyright International Organization for Standardization IS02013 without license from IHS Not for Resale IS020958:2013(E) COPYRIGHTPROTECTEDDOCUMENT ISO2013 All rights reserved. Unless otherwise specified, 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 on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56.CH-1211 Geneva 20 Tel. + 4122 749 0111 Fax +41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ IS0 2013 - All rights reserved No reproduction or networking permited without license from IHS Not for Resale IS020958:2013(E) Contents Page Foreword ..iv Introduction. 1 Scope.. 2 Normative references 3 Terms and definitions ..1 4 Electrical signature analysis of three-phase induction motors .2 4.1 General .2 4.2 Statorcurrentanalysis 4.3 Electrical current, voltage, and power analysis .10 4.4 Magneticflux analysis. .12 4.5 Partial discharge analysis .13 4.6 Electromagneticinterferencetesting 18 4.7 Rotor current analysis .20 4.8 Shaft voltage analysis 20 AnnexA (informative) Park's vectorapproach .21 Bibliography .23 iii thout license from IHS Not for Resale