NEMA C29 9-2017 Wet Process Porcelain Insulators - Apparatus Post Type.pdf

1、NEMA Standards PublicationNational Electrical Manufacturers AssociationANSI/NEMA C29.9-2017Wet Process Porcelain Insulators Apparatus, Post TypeApproved as an American National Standard ANSI Approval Date of Final Action: September 19, 2017 ANSI/NEMA C29.9-2017 American National Standard for Wet Pro

2、cess Porcelain Insulators Apparatus, Post Type Published by National Electrical Manufacturers Association 1300 North 17thStreet, Suite 900 Rosslyn, VA 22209 www.nema.org 2017 National Electrical Manufacturers Association. All rights, including translation into other languages, reserved under the Uni

3、versal Copyright Convention, the Berne Convention for the Protection of Literary and Artistic Works, and the International and Pan American copyright conventions. 2017 National Electrical Manufacturers Association NOTICE AND DISCLAIMER The information in this publication was considered technically s

4、ound by the consensus of persons engaged in the development and approval of the document at the time it was developed. Consensus does not necessarily mean that there is unanimous agreement among every person participating in the development of this document. American National Standards Institute (AN

5、SI) standards and guideline publications, of which the document contained herein is one, are developed through a voluntary consensus standards development process. This process brings together volunteers and/or seeks out the views of persons who have an interest in the topic covered by this publicat

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13、lity of the certifier or maker of the statement. ANSI/NEMA C29.9-2017 Page i 2017 National Electrical Manufacturers Association Foreword (This foreword is not part of ANSI/NEMA C29.9-2017.) The first edition of this standard was essentially based on the EEI-NEMA standard Wet-Process Porcelain Insula

14、tors (Apparatus, Post Type), EEI TDJ-59, NEMA 147-1956 (EEI is the Edison Electric Institute; NEMA is the National Electrical Manufacturers Association). It was developed by the American National Standards Committee on Insulators for Electric Power Lines, C29. This edition of the standard replaces A

15、NSI/NEMA C29.9-1983 (R2012). Suggestions for improvement of this standard are welcomed. They should be sent by the date of its next scheduled revision, which is December 31, 2022, to: Senior Technical Director, Operations National Electrical Manufacturers Association 1300 North 17thStreet, Suite 900

16、 Rosslyn, VA 22209 This standard was processed and approved for submittal to ANSI by Accredited Standards Committee on Insulators for Electric Power Lines, C29. Committee approval of the standard does not necessarily imply that all committee members voted for approval. At the time it approved this s

17、tandard, the ASC C29 Committee had the following members: Arjan Jagtiani, Chairman Gerard Winstanley, Secretary Name Organization Interest Category N. DeSantis LineWorks Engineering General A. Jagtiani Sargent the catalog number, Technical Reference number, or other description of the contents; and

18、the manufacturers name. Manufacturers should maintain records of the plant in which the insulator was produced. ANSI/NEMA C29.9-2017 Page 16 2017 National Electrical Manufacturers Association Appendix B Additional Electrical Design Tests (This appendix is not part of ANSI/NEMA C29.9-2017 but is incl

19、uded for information only.) If the following additional electrical design tests are required, the procedure given in this appendix may prove useful. B.1 Low-Frequency Dry Flashover One insulator should be selected at random and tested in accordance with Clause 4.2 of ANSI C29.1, Low-Frequency Dry Fl

20、ashover Voltage Tests. The average flashover test (total of 5) must exceed 95 percent, with no single test below 85 percent. Failure of any test value to equal or exceed 85 percent of the rated dry flashover shall constitute failure to meet the requirements of the standard. The retest procedure of C

21、lause 4.4 shall apply. B.2 Low-Frequency Wet Flashover One insulator should be selected at random and tested in accordance with Clause 4.3 of ANSI C29.1, Low-Frequency Wet Flashover Voltage Tests. The average flashover test (total of 5) must exceed 95 percent, with no single test below 85 percent. F

22、ailure of any test value to equal or exceed 85 percent of the rated wet flashover shall constitute failure to meet the requirements of the standard. The retest procedure of Clause 4.4 shall apply. B.3 Critical Impulse Flashover, Negative One insulator should be selected at random and tested in accor

23、dance with Clause 4.7 of ANSI C29.1, Impulse Flashover Voltage Tests. The critical impulse flashover, negative, value of the insulator should be equal to or exceed 92 percent of the rated critical impulse flashover, negative, value of the insulator. The retest procedure of Clause 4.4 shall apply. NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION 1300 NORTH 17TH STREET, SUITE 900 ROSSLYN. VA 22209www.NEMA.orgTO ORDER ADDITIONAL NEMA STANDARDS VISITWWW.GLOBAL.IHS.COM OR CALL 1-800-854-7179/1-303-397-79565612_0514TB