ANSI NEMA C29.10-1989 For Wet Process Porcelain Insulators - Indoor Apparatus Type.pdf

1、NEMA Standards PublicationNational Electrical Manufacturers AssociationAANSI/NEMA C29.10-1989 (R2012)For Wet Process Porcelain Insulators Indoor Apparatus TypeANSI/NEMA C29.10-1989 (R2002, R2012) American National Standard For Wet Process Porcelain Insulators Indoor Apparatus Type Secretariat: Natio

2、nal Electrical Manufacturers Association Approved: August 2012 Published: July 2013 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 docume

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17、en periodically to reaffirm, revise, 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 Stree

18、t, Rosslyn, VA 22209 Copyright 2013 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 Pa

19、n American Copyright Conventions. 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. C29.10-1989 (R2002, R2012) Page i Copyright 2013 by National El

20、ectrical Manufacturers Association FOREWORD (This Foreword is not part of American National Standard C29.10-1989 (R2002, R2012) In this standard are specified the material, dimensional, and performance requirements for indoor apparatus wet-process porcelain insulators used in electric power transmis

21、sion and distribution. Included are requirements for testing thermal and mechanical strength, impulse and dew withstand values, flashover value, porosity, and, when galvanized hardware is used, coating thickness. This standard supersedes ANSI C37.31-1962 (R1976), which had been developed by the Accr

22、edited Standards Committee on Power Switchgear, C37, and approved as an American National Standard on April 17, 1962. Responsibility for this standard has been transferred to the Accredited Standards Committee on Insulators for Electric Power Lines, C29, by mutual agreement between both committees.

23、The purpose of this revision and redesignation is to bring the standard up to date and in line with present-day requirements. Suggestions for improvement of this standard will be welcome. They should be sent to the National Electrical Manufacturers Association, 1300 North 17th Street, Rosslyn, VA 22

24、209 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 standard, the AS

25、C 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 W. Avery J. Varner (alt) R. Kluge (alt) G. Obenchain (alt) Institute of Electrical

26、 and Electronic Engineers T. Grisham J. Hildreth A. Jagtiani J. Kuffel A. Phillips 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) C29.10-1989 (R2002, R2012) Pa

27、ge ii Copyright 2013 by National Electrical Manufacturers Association Tennessee Valley Authority J. Nelson Western Area Power Administration R. Clark C29.10-1989 (R2002, R2012) Page iii Copyright 2013 by National Electrical Manufacturers Association TABLE OF CONTENTS Page FOREWORD i 1 SCOPE 1 2 REFE

28、RENCED STANDARDS . 1 2.1 American National Standards 1 2.2 Other Standard . 1 3 DEFINITIONS 1 4 GENERAL 1 5 MATERIAL . 1 6 DIMENSIONS AND CHARACTERISTICS 2 7 MARKING 2 8 SAMPLING, INSPECTION, AND TESTS 2 8.1 General . 2 8.2 Design Tests 2 8.2.1 Tensile Strength . 2 8.2.2 Impulse Withstand . 2 8.2.3

29、Compression Strength . 2 8.2.4 Thermal Shock . 2 8.2.5 Torsional Strength 3 8.2.6 Low-Frequency Dew Withstand . 3 8.3 Quality Conformance Tests . 3 8.3.1 Visual and Dimensional Tests 3 8.3.2 Porosity Test 3 8.3.3 Galvanizing Test. 3 8.3.4 Cantilever-Strength 3 8.4 Routine Test for Flashover 3 TABLES

30、 1 Metric Equivalents . 4 2 Electrical Characteristics 4 3 Mechanical Characteristics of Strength Class A-10 . 4 4 Mechanical Characteristics of Strength Classes A-20 and B-20 . 5 5 Mechanical Characteristics of Strength Classes A-30 and B-30 . 5 6 Mechanical Characteristics of Strength Class B-40 .

31、 5 7 Mechanical Characteristics of Strength Class B-50 . 5 FIGURES 1 Class “A” Construction . 6 2 Class “B” Construction . 7 2 Class “B” Construction (continued) 8 C29.10-1989 (R2002, R2012) Page iv Copyright 2013 by National Electrical Manufacturers Association APPENDIX . 9 C29.10-1989 (R2002, R201

32、2) Page 1 Copyright 2013 by National Electrical Manufacturers Association For Wet Process Porcelain InsulatorsIndoor Apparatus Type 1 SCOPE This standard covers high-voltage indoor-apparatus insulators made of wet-process porcelain and used in the transmission and distribution of electrical energy.

33、2 REFERENCED STANDARDS 2.1 American National Standard. This standard is intended to be used in conjunction with American National Standard for Electrical Power Insulators Test Methods, ANSI C29.1-1988 (R2012). When the referenced standard is superseded by a revision approved by the American National

34、 Standards Institute, Inc, the revision shall apply. 2.2 Other Standard. This standard is also intended to be used in conjunction with the following standards: ASTM A 153-82 (1987), Specifications for Zinc Coating (Hot Dip) on Iron and Steel Hardware ASTM D 1535-80, Method for Specifying Color by th

35、e Munsell System 3 DEFINITIONS See Section 2 of ANSI C29.1-1988 (R2012) for definitions of terms. 4 GENERAL 4.1 Insulators shall conform in all respects to the requirements of this standard. The text, figures, and tables supplement each other and shall be considered part of this standard. 4.2 Manufa

36、cturers drawings, if furnished, shall show the outline of the insulators, together with all pertinent dimensions. Any variations in these dimensions due to manufacturing tolerances shall be indicated. 5 MATERIAL 5.1 The insulators shall be made of wet-process porcelain of good commercial grade. 5.2

37、The entire surface of the insulator, with the exception of a firing surface, shall be glazed. The entire surface shall be relatively free from imperfections. Color is not a part of this standard. If gray is required, it shall be in accordance with ASTM D 1535-80, and conform to Munsell notation 5BG

38、7.0/0.4 with the following tolerances: (1) Hue: 12 (3G to 7B) (2) Value: 0.5 (3) Chroma: -0.2 to +0.6 5.3 Metal parts shall be made of a good commercial grade of malleable iron, ductile iron or steel, gray iron, zinc alloy, or aluminum alloy. Ferrous parts other than stainless steel, when galvanized

39、, shall be galvanized in accordance with ASTM A 153-82 (1987). AMERICAN NATIONAL STANDARD ANSI/NEMA C29.10-1989 (R2002, R2012) C29.10-1989 (R2002, R2012) Page 2 Copyright 2013 by National Electrical Manufacturers Association 6 DIMENSIONS AND CHARACTERISTICS 6.1 Indoor insulators are classified accor

40、ding to construction: Class A Insert top and bottom (Figure 1) Class B Insert top, externally bonded base (Figure 2) The figures are type drawings. Dimensions and characteristics shall be in accordance with the tables. Top and bottom holes shall be as shown in the figures. 6.2 Shell diameters shall

41、not exceed 103 percent of the dimensions shown in the figures, to ensure physical clearances in assembled apparatus. Minimum diameters are limited by the other specified characteristics. 6.3 All dimensions and other numerical values are given in customary English units. Except as otherwise stated, t

42、he metric equivalents shall be as shown in Table 1. 7 MARKING Each insulator shall bear a symbol identifying the manufacturer and giving the year of manufacture. The marking shall be legible and durable. 8 SAMPLING, INSPECTION, AND TESTS 8.1 General. Tests described in 8.2 shall be required only on

43、insulators of new designs. Tests described in 8.3 shall be required on each lot of insulators. The tests described in 8.4 shall be made on each insulator. 8.2 Design Tests 8.2.1 Tensile Strength. Three insulators shall be selected at random and tested in accordance with 5.1.4.3 of ANSI C29.1-1988 (R

44、2012). Failure of the average strength of the three insulators to meet the strength requirements given in the applicable table, or failure of any one insulator to equal 85 percent of that strength requirement, shall constitute failure to meet the requirements of this standard. 8.2.2 Impulse Withstan

45、d. Three insulators shall be selected at random and tested in accordance with 4.8 of ANSI C29.1-1988. Failure of any insulator to meet the rated impulse-withstand value in the applicable table shall constitute failure to meet the requirements of this standard. 8.2.3 Compression Strength. Three insul

46、ators shall be selected at random and tested in accordance with 5.1.4.4 of ANSI C29.1-1988. Failure of the average strength of the three insulators to meet the strength requirements given in the applicable table, or failure of any one insulator to equal 85 percent of that strength requirement, shall

47、 constitute failure to meet the requirements of this standard. 8.2.4 Thermal Shock. Three insulators shall be selected at random and tested for ten complete cycles in accordance with 5.5 of ANSI C29.1-1988. The temperature of the hot-water bath shall be approximately 150F (66C), and the temperature

48、of the cold-water bath shall be approximately 39F (4C). At the end of the tenth cycle, the test specimens shall be checked for electrical soundness. If one insulator fails, three additional insulators shall be selected at random and tested. Failure of more than one insulator from the first sample, o

49、r from the first and second samples combined, shall constitute failure to meet the requirements of this standard. C29.10-1989 (R2002, R2012) Page 3 Copyright 2013 by National Electrical Manufacturers Association 8.2.5 Torsional Strength. Three insulators shall be selected at random and tested in accordance with 5.1.4.2 of ANSI C29.1-1988. Failure of the average strength of the three insulators to meet the strength requirement given in the applicable table, or failure of any one insulator to equal 85 percent of that strength requirem