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1、IEEE Std P43-2000 (Revision of IEEE Std 43-2000) IEEE Recommended Practice for Testing Insulation Resistance of Rotating Machinery May 2008 DraftSponsor Electric Machinery Committee of the IEEE Power Engineering Society Reaffirmed 2006 March 2000 IEEE-SA Standards Board Abstract: This document descr
2、ibes the recommended procedure for measuring insulation resistance of armature and field windings in rotating machines rated 1 hp, 750 W or greater. It applies to synchronous machines, induction machines, dc machines, and synchronous condensers. Contained within this document is the general theory o
3、f insulation resistance (IR) and polarization index (P.I.), as well as factors affecting the results, test procedures, methods of interpretation, test limitations, and recommended minimum values. Keywords: absorption current, conduction current, discharge current, geometric capacitive current, insul
4、ation resistance, polarization index, surface leakage current The Institute of Electrical and Electronics Engineers, Inc.3 Park Avenue, New York, NY 10016-5997, USACopyright 2000 by the Institute of Electrical and Electronics Engineers, Inc.All rights reserved. Published 24 March 2000. Printed in th
5、e United States of America.Print: ISBN 0-7381-1924-5 SH94806PDF: ISBN 0-7381-1925-3 SS94806No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher.IEEE Standards documents are developed within th
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18、dual standard for educational classroom use can also be obtained through the Copyright Clearance Center. Introduction (This introduction is not part of IEEE Std 43-2000, IEEE Recommended Practice for Testing Insulation Resistance of Rotating Machinery.) Insulation resistance measurement has been rec
19、ommended and used for more than half a century to evaluate the condition of electrical insulation. Whereas individual insulation resistance measurements may be of questionable value, the carefully maintained record of periodic measurements, accumulated over months and years of service, is of unquest
20、ioned value as a measure of some aspects of the condition of the electrical insulation. Originally, in 1950, this recommended practice was published by the AIEE as a guide to present the various facets associated with the measurement and understanding of electrical insulation resistance. The guide w
21、as revised in 1961 and again in 1974. During the 1970s, several changes were made to the types of insulation used in electric rotating machines. The insulation resistance characteristics of these newer insulation systems are different from the older systems, and therefore required this substantial r
22、evision to the standard for measuring insulation resistance. Other changes include the addition of further description of the testing theory and the removal of suggestions regarding maintenance dry-out procedures for older windings (previously Annex A). Recommendations for maintenance procedures are
23、 beyond the scope of this document. With this publication as a recommended practice, the IEEE is presenting and recommending electrical insulation resistance measurement as an important factor in monitoring the condition of electrical insulation in rotating machinery. This recommended practice descr
24、ibes the theory, procedure, and interpretation of the insulation resistance test. It is intended for the following: Individuals or organizations who manufacture rotating machines Individuals or organizations who are responsible for the acceptance of new rotating machines Individuals or organizations
25、 who test and maintain rotating machines Individuals or organizations who operate rotating machines This recommended practice is designed to help organizations and individuals Evaluate the condition of the electrical insulation used in rotating machines Determine if the electrical insulation of a ro
26、tating machine is suitable for return-to-service Determine if the electrical insulation of a rotating machine is suitable for high-potential testing This recommended practice is intended to satisfy the following objectives: a) Promote consistency for insulation test procedures and interpretations b)
27、 Provide useful information on proper application of the insulation resistance test c) Provide useful information on the technical theory of insulation resistance testing The revision to this recommended practice was prepared by a working group of the Materials Subcommittee of the Electric Machinery
28、 Committee of the IEEE Power Engineering Society. Working group personnel were Ian Culbert, Chair The nal conditions for approval of this standard were met on?. This standard was conditionally approved by the IEEE-SA Standards Board on 30 January 2000, with the following membership: Also included is
29、 the following nonvoting IEEE-SA Standards Board liaison: IEEE Standards Project Editor Contents 1. Overview . 11.1 Scope . 11.2 Purpose . 12. References . 23. Definitions . 34. Safety considerations . 35. Insulation resistancegeneral theory . 45.1 Components of the measured direct current . 45.2 Ch
30、aracteristics of the measured direct current . 65.3 Insulation resistance readings . 65.4 Polarization index readings . 75.5 Discharge current . 86. Factors affecting insulation resistance . 86.1 Effect of surface condition . 86.2 Effect of moisture . 96.3 Effect of temperature . 96.4 Effect of test
31、 voltage magnitude . 116.5 Effect of existing charge on winding resistance measurements . 127. Conditions for measuring insulation resistance . 128. Winding connections for insulation resistance tests . 129. Methods of measuring insulation resistance . 139.1 Direct measurement . 139.2 Calculated mea
32、surement . 1310. Precautions . 1311. Interpretation of insulation resistance and polarization index test results . 1411.1 Monitoring insulation condition . 1411.2 Suitability for operation or continued testing . 1411.3 Limitations of the insulation resistance test . 1512. Recommended minimum value o
33、f polarization index and insulation resistance . 1512.1 Minimum values . 1512.2 Polarization index . 1512.3 Insulation resistance . 16Annex A (informative)Variants in polarization index . 18Annex B (informative)Direct versus alternating voltage testing . 19Annex C (informative)Regulation in power su
34、pplies used for insulation resistance measurement20 IEEE Recommended Practice for Testing Insulation Resistance of Rotating Machinery1. Overview 1.1 ScopeThis document describes a recommended procedure for measuring insulation resistance of armature and eld windings in rotating machines rated 1 hp,
35、750 W or greater. It applies to synchronous machines, induction machines, dc machines, and synchronous condensers. It does not apply to fractional-horsepower machines. The document also describes typical insulation resistance characteristics of rotating machine windings and how these characteristics
36、 indicate winding condition. It recommends minimum acceptable values of insulation resistance for ac and dc rotating machine windings. Other IEEE standards that include information on insulation resistance measurement are listed in Clause 2.1.2 PurposeThe purpose of this recommended practice is to a
37、) Dene insulation resistance and polarization index testing of the winding of a rotating machine. b) Review the factors that affect or change insulation resistance characteristics. c) Recommend uniform test conditions. d) Recommend uniform methods for measuring insulation resistance with precautions to avoid erroneous results. e) Prov
