NEMA C29 12-2013 For Composite Insulators Transmission Suspension Type.pdf

1、NEMA Standards PublicationNational Electrical Manufacturers AssociationANSI/NEMA C29.12-2013Composite Insulators Transmission Suspension TypeANSI/NEMA C29.12-2013 American National Standard for Composite Insulators Transmission Suspension Type Secretariat: National Electrical Manufacturers Associati

2、on Approved: November 2013 Published: January 2014 American National Standards Institute, Inc. NOTICE AND DISCLAIMER The information in this publication was considered technically sound by the consensus of persons engaged in the development and approval of the document at the time it was developed.

3、Consensus does not necessarily mean that there is unanimous agreement among every person participating in the development of this document. American National Standards Institute (ANSI) standards and guideline publications, of which the document contained herein is one, are developed through a volunt

4、ary 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 publication. While NEMA administers the process and establishes rules to promote fairness in the development of consensus, it d

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16、essed to the secretariat or sponsor whose name appears on the title page of this standard. Caution Notice: This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute require that action be taken periodically to reaffirm, revis

17、e, or withdraw this standard. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute. Published by National Electrical Manufacturers Association 1300 North 17th Street, Rosslyn, VA 22209 Copyright 201

18、4 by National Electrical Manufacturers Association All rights reserved including translation into other languages, reserved under the Universal Copyright Convention, the Berne Convention for the Protection of Literary and Artistic Works, and the International and Pan American Copyright Conventions.

19、No 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. Printed in the United States of America. C29.12-2013 Page i 2014 National Electrical Manufacturers Association FOREWORD (This Foreword is

20、not part of American National Standard C29.12-2013.) This first edition of this standard was based on a NEMA proposed standards publication for composite suspension insulators used on overhead transmission lines. It was developed at the request of American National Standards Committee on Insulators

21、for Electric Power Lines, ASC C-29. Suggestions for improvement of this standard will be welcome. They should be sent by the date of its next scheduled revision which is December 31st, 2015 to: Senior Technical Director, Operations National Electrical Manufacturers Association 1300 North 17th Street

22、, Suite 900 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 appr

23、oved this standard, the ASC C-29 Committee had the following members: Rob Christman, Chairman Steve Griffith, Secretary Organization Represented: Name of Representative: Edison Electric Institute B. Freimark R. Christman E. Cleckley M. Garrels R. Kluge J. Varner (alt) G. Obenchain (alt) Institute of

24、 Electrical and Electronic Engineers T. Grisham J. Hildreth A. Jagtiani J. Kuffel E. Gnandt (alt) National Electrical Manufacturers Association P. Maloney A. Baker R. A. Bernstorf G. Powell G. A. Stewart E. Kress (alt) Z. Lodi (alt) E. Niedospial (alt) A. Schwalm (alt) Tennessee Valley Authority J.

25、Nelson R. Stargel (alt) Western Area Power Administration R. Clark C29.12-2013 Page ii 2014 National Electrical Manufacturers Association C29.12-2013 Page iii 2014 National Electrical Manufacturers Association TABLE OF CONTENTS Page FOREWORD . iv 1 SCOPE 1 2 NORMATIVE REFERENCES 1 2.1 Referenced Ame

26、rican National Standards 1 2.2 Other Standards 1 3 DEFINITIONS AND ABBREVIATIONS . 1 3.1 Specified Mechanical Load (SML) . 1 3.2 Routine Test Load (RTL) . 1 4 GENERAL 2 5 MATERIALS 2 5.1 Core . 2 5.2 Weathersheds . 2 5.3 Metal Parts 2 6 DIMENSIONS AND CHARACTERISTICS 2 7 MARKING 2 8 PROTOTYPE TESTS

27、3 8.1 Tests on Interfaces and Connection of End Fittings . 3 8.2 Core Time-load Test . 3 8.3 Housing Tracking and Erosion Tests . 4 8.4 Core Material Tests 4 8.4.1 Dye Penetration Evaluation 4 8.4.2 Water Diffusion Test Evaluation . 4 8.5 Flammability test. . 4 9 DESIGN TESTS . 4 9.1 Low-Frequency D

28、ry Flashover Test. 4 9.2 Low-Frequency Wet Flashover Test 4 9.3 Critical Impulse Flashover Tests - Positive and Negative 4 9.4 Radio-Influence Voltage . 5 10 QUALITY CONFORMANCE TESTS . 5 10.1 Dimensional Tests. . 5 10.2 Galvanizing Test . 5 10.3 Specified Mechanical Load Test 5 11 ROUTINE TESTS 5 1

29、1.1 Tension-Proof Test. 5 11.2 Visual Examination . 5 FIGURES 1 Oval-Eye End Fitting and Y-Clevis End Fitting Dimensions . 6 C29.12-2013 Page iv 2014 National Electrical Manufacturers Association TABLES 1 Prototype Testing . 3 2 20,000 and 25,000 lb SML Dimensions and Electrical Characteristics . 7

30、3 36,000 and 40,000 lb SML Dimensions and Electrical Characteristics . 8 APPENDIX . 9 C29.12-2013 Page v 2014 National Electrical Manufacturers Association C29.12-2013 Page 1 2014 National Electrical Manufacturers Association for Composite InsulatorsTransmission Suspension Type 1 SCOPE This standard

31、 covers composite suspension (tension) insulators with a minimum section length of 46 inches (1168.4 mm) made of a fiberglass-reinforced resin matrix core, polymer material weathersheds, and metal end fittings intended for use on overhead transmission lines for electric power systems. Mechanical and

32、 electrical performance levels specified herein are requirements for new insulators. 2. NORMATIVE REFERENCES 2.1 Referenced American National Standards This standard is intended to be used in conjunction with the following American National Standards. When these standards are superseded by a revisio

33、n approved by the American National Standards Institute, the revision shall apply. ANSI C29.1-1988 (R2012) Test Methods of Electrical Power Insulators ANSI C29.11-2012 American National Standard for Composite Insulators Test Methods IEEE 4-1995 Techniques for High Voltage Testing IEEE 100 -1984 Dict

34、ionary of Electrical and Electronics Terms 2.2 Other Standards IEC 60695-11-10 Fire Hazard Testing Part 11-10: Test Flames 50 W Horizontal and Vertical Flame Test Methods NEMA Publication Number 107-1987 Methods of measurement of radio influence voltage (RIV) of high-voltage apparatus ISO-3452-1: 20

35、08 Non-Destructive Testing Penetrant Testing Part 1: General Principles ASTM B499-09 Standard Test Method for Measurement of Coating Thicknesses by the Magnetic Method; Nonmagnetic Coatings on Magnetic Basis Metals ASTM A153-82 Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware 3 DE

36、FINITIONS AND ABBREVIATIONS See Section 3 of American National Standard for Composite Insulators Test Methods, ANSI C29.11 and Section 2 of American National Standard Test Methods for Electrical Power Insulators, ANSI C29.1 for definition of terms not defined here. 3.1 Specified Mechanical Load (SML

37、) The SML is a value that has to be verified during a tensile load test. It forms the tensile loading basis for selection of a composite suspension insulator. 3.2 Routine Test Load (RTL) The RTL is a load equal to 50% of the SML. Abbreviations used in this document include: mA milliamperes rms root-

38、mean-square AMERICAN NATIONAL STANDARD ANSI/NEMA C29.12-2013 C29.12-2013 Page 2 2014 National Electrical Manufacturers Association s second mm millimeters 4 GENERAL 4.1 Insulators shall conform in all respects to the requirements of this standard. The text, figures, and tables supplement each other

39、and shall be considered part of this standard. 4.2 Manufacturers drawings, if furnished, shall show the outline of the insulators, together with all pertinent dimensions, and mechanical, electrical, and leakage values. Any variations in these dimensions due to manufacturing tolerances shall be indic

40、ated. 5 MATERIALS 5.1 Core The core is the internal insulating part of a composite insulator. It is intended to carry the mechanical load. It consists mainly of glass fibers positioned in a resin matrix to develop mechanical strength. 5.2 Weathersheds The weathersheds shall be made of polymer materi

41、als such as ethylene propylene or silicone elastomers. They may contain inorganic fillers and organic compounding agents. 5.3 Metal Parts Metal parts, except for cotter keys, shall be made of a good commercial grade of malleable iron, ductile iron, steel, or aluminum. All ferrous parts, other than s

42、tainless steel, shall be galvanized in accordance with specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware ASTM A153 (latest revision). Cotter keys shall be made from cold-drawn bronze, brass, or austenitic stainless steel wire. 6 DIMENSIONS AND CHARACTERISTICS 6.1 Dimensions and cha

43、racteristics of the insulators shall be in accordance with manufacturers drawings. General tolerances shall be in accordance with ANSI C29.11 section 5. End fittings shall be in accordance with figure 1 or meet the ball and socket gauge requirements shown in figures 4, 5, 6, 7 and 8 of ANSI C29.2B.

44、Requirements for a specific ANSI class shall be as shown in tables 1 or 2. The shapes of the weathersheds and spacing between them are not part of this standard. 6.2 Insulator end fittings of the Y-Clevis type (Fig. 1) shall be furnished with a bolt and nut, with a hump-type cotter key installed in

45、the clevis bolt. 6.3 All dimensions and other numerical values are given in customary English units except as otherwise stated. NOTE: GRADING FOR CONTROL OF RIV AND CORONA (ELECTRIC FIELD) MAY BE APPROPRIATE FOR COMPOSITE INSULATORS. 7 MARKING Each insulator shall be clearly and indelibly marked wit

46、h the name or trademark of the manufacturer, the year of manufacture, the specified mechanical load (SML) with appropriate units, and the routine test load (RTL) with appropriate units. The routine test load shall be identified by the word “TEST”. C29.12-2013 Page 3 2014 National Electrical Manufact

47、urers Association 8 PROTOTYPE TESTS Prototype tests are required to verify the suitability of the materials and method of manufacture for composite insulators defined by the following characteristics: These tests are described and specified in ANSI C29.11, Section 4.1 and 7. (1a) same shed material

48、(1b) same housing material (2) same core material (3) same core diameter (4) same metal fitting material (5a) same metal fitting connection zone design (5b) same core-metal-housing interface (6) same metal fitting method of attachment to core To allow for manufacturing variations, (3) may vary up to

49、 15% before the design tests must be repeated except as noted below. Retesting is not required for greater thickness of housing. Retesting is also not required for a longer connection zone. Retesting is required for an increase in strength ratings. The materials and methods of manufacture for insulators shall be qualified by successful completion of the following tests. Design changes shall be tested as listed in table 1. If the insulator design changes the. Then the following design prototype tests shall be r