1、NEMA Standards PublicationNational Electrical Manufacturers AssociationANSI/NEMA C29.6-2015Wet-Process Porcelain Insulators High-Voltage Pin-TypeANSI/NEMA C29.6-2015 American National Standard for Wet-Process Porcelain Insulators High-Voltage Pin-Type Secretariat: National Electrical Manufacturers A
2、ssociation Approved: July 30, 2015 Published: September 18, 2015 American National Standards Institute, Inc. 2015 National Electrical Manufacturers Association NOTICE AND DISCLAIMER The information in this publication was considered technically sound by the consensus of persons engaged in the develo
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12、I/NEMA C29.6-2015 Page i AMERICAN NATIONAL STANDARD Approval of an American National Standard requires verification by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Consensus is established when, in the judgment of th
13、e ANSI Board of Standards Review, substantial agreement has been reached by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted ef
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15、orming to the standards. The American National Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in th
16、e name of the American National Standards Institute. Requests for interpretations should be addressed 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 CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time.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 Am
17、erican National Standards Institute require that action be taken 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 Natio
18、nal Electrical Manufacturers Association 1300 North 17th Street, Suite 900, Rosslyn, VA 22209 2015 National Electrical Manufacturers Association All rights, including translation into other languages, reserved under the Universal Copyright Convention, the Berne Convention for the Protection of Liter
19、ary and Artistic Works, and the International and Pan American copyright conventions. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without prior written permission of the publisher. Printed in the United States of America ANSI/NEMA C29.6-
20、2015 Page ii 2015 National Electrical Manufacturers Association FOREWORD (This Foreword is not part of American National Standard C29.6-2015) The first edition of this standard was based essentially on the EEI-NEMA (Edison Electric InstituteNational Electrical Manufacturers Association) standards fo
21、r Wet-Process Porcelain Insulators (High-Voltage Pin Type), EEI TDJ-56, NEMA 144-1952. Subsequent revisions were developed by the Standards Committee on Insulators to Electric Power Lines, C29. The principal differences between this edition and the previous (1996) edition are revisions to the color
22、and marking requirements, addition of more specific requirements for conductor groove dimensions, and a change in the acceptance criteria for the cantilever strength test. The figures were revised for clarity. Suggestions for improvement of this standard are welcome. They should be sent by the date
23、of its next scheduled revision (December 31, 2020) to: Senior Technical Director, Operations National Electrical Manufacturers Association 1300 North 17th Street, Suite 900 Rosslyn, VA 22209 This standard was processed and approved for submittal to ANSI by Accredited Standards Committee (ASC) on Ins
24、ulators 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 ASC C29 Committee had the following members: A. Jagtiani, Chairman G. Winstanley, Secretary Organization Repr
25、esented: Name of Representative: Edison Electric Institute E. Cleckley B. Freimark M. Garrels R. Kluge K. Reese M. Gray (alt) D. Mar (alt) T. Rao (alt) A. Shkuratkov (alt) Institute of Electrical and Electronic Engineers T. Grisham N. DeSantis A. Jagtiani J. Kuffel T. Shaw J. George (alt) J. Varner
26、(alt) ANSI/NEMA C29.6-2015 Page iii 2015 National Electrical Manufacturers Association Organization Represented: Name of Representative: National Electrical Manufacturers Association A. Baker R. Bernstorf A. Schwalm T. Van Remmen G. Stewart E. Niedospial (alt) P. Maloney (alt) Bonneville Power Admin
27、istration D. Liebhaber J. Havel (alt) Tennessee Valley Authority J. Nelson R. Stargel (alt) Western Area Power Administration R. Clark ANSI/NEMA C29.6-2015 Page iv 2015 National Electrical Manufacturers Association Contents Foreword . ii 1 Scope 1 2 Referenced Standards 1 3 Definitions 1 4 General .
28、 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 Low-Frequency Dry Flashover Test 2 8.2.2 Low-Frequency Wet Flashover Test . 2 8.2.3 Critical Impulse Flashover TestsPositive and Negative . 3 8.2.4 Radio-
29、Influence Voltage Test 3 8.2.5 Thermal Shock Test 3 8.3 QUALITY CONFORMANCE TESTS . 3 8.3.1 Visual and Dimensional Tests . 3 8.3.2 Porosity Test 3 8.3.3 Cantilever-Strength Test . 3 8.3.4 Pinhole-Gauging Test 3 8.3.5 Puncture Test 4 8.4 Routine Test (Flashover Test) . 4 Appendix . 11 Figures Figure
30、1 Pin Insulator, Class 56-1 5 Figure 2 Pin Insulator, Class 56-2 6 Figure 3 Pin Insulator, Class 56-3 7 Figure 4 Pin Insulator, Class 56-4 8 Figure 5 Pin Insulator, Class 56-5 9 Figure 6 Insulator Thread Gauge . 10 Table Table 1 Neck Designations and Dimensions 2 ANSI/NEMA C29.6-2015 Page 1 2015 Nat
31、ional Electrical Manufacturers Association 1 Scope This standard covers high-voltage pin-type insulators made of wet-process porcelain and used in the transmission and distribution of electrical energy. 2 Referenced Standards This standard is intended for use in conjunction with the latest approved
32、revisions of the following standards: ANSI C29.1 Test Methods for Electrical Power Insulators ASTM D 1535-80 Standard Practice for Specifying Color by the Munsell System 3 Definitions See Section 2 of ANSI C29.1 for definitions of terms. 4 General 4.1 Insulators shall conform in all respects to the
33、requirements of this standard. The text and figures supplement each other 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. Any variations in these dimensions due to manufacturing
34、 tolerances shall be indicated. 4.3 When specified in the clauses below, the following re-test procedure applies: If only one insulator fails to comply with the applicable test, a new sample equal to twice the quantity originally submitted to that test shall be subjected to re-testing. If two or mor
35、e insulators fail to comply, or if any failure occurs during the re-testing, the complete lot is considered as not complying with the requirements of this standard. 5 Material 5.1 The insulators shall be made of commercial-grade wet-process porcelain that meets the mechanical and electrical requirem
36、ents of this standard. 5.2 The surface of the shells exposed after the assembly shall be glazed for porcelain insulators. NOTEThe most common requested color for porcelain is gray. If gray is required, it shall be in accordance with ASTM D1535 and shall conform to Munsell notation 5BG 7.0/0.4 with t
37、he following tolerances: a) Hue: 12 (3G to 7B) b) Value: 0.5 c) Chroma: -0.2 to +0.6 Other colors are available and can be negotiated between purchaser and supplier. 5.3 Metal parts shall be made of a suitable corrosion resistance and temper. ANSI/NEMA C29.6-2015 Page 2 2015 National Electrical Manu
38、facturers Association 6 Dimensions and Characteristics 6.1 Figures 1-5 (see pages 5-9) are drawings of insulator types. Dimensions and characteristics of the insulators shall be in accordance with these figures. Height requirements are minimum +0.25 inch. 6.2 When specified, neck designations shall
39、be as shown in Table 1. All surfaces that might come in contact with conductors or tie wires must be rounded to prevent abrasion, cracking, or metal fatigue. The minimum depth of the top conductor groove shall be 65% of the radius. The length of the top conductor groove shall not exceed the maximum
40、neck diameter by more than 0.12 inches. Insulator height is a minimum, H -0/+0.25 inch, to allow for top groove depth. 6.3 All dimensions and other numerical values are given in customary English units. Table 1 Neck Designations and Dimensions 7 Marking Each insulator shall include markings to ident
41、ify: manufacturer, the ANSI class number or catalog number, and a time/lot reference (as a minimum, the month and year that the item was produced). 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 insulators of n
42、ew designs. Tests described in 8.3 shall be required on each lot of insulators. Tests described in 8.4 shall be made on each insulator. 8.2 DESIGN TESTS 8.2.1 Low-Frequency Dry Flashover Test Three insulators shall be selected at random and tested in accordance with 4.2 of ANSI C29.1, “Low-Frequency
43、 Dry Flashover Voltage Tests.” Failure of the average dry flashover value of the three insulators to equal or exceed 95% of the rated dry flashover value, as given in the applicable figure, shall constitute failure to meet the requirements of this standard. 8.2.2 Low-Frequency Wet Flashover Test Thr
44、ee insulators shall be selected at random and tested in accordance with 4.3 of ANSI C29.1, “Low-Frequency Wet Flashover Tests.” Failure of the average wet flashover value of the three insulators to equal or exceed 90% of the rated wet flashover value, as given in the applicable figure, shall constit
45、ute failure to meet the requirements of this standard. Designation Diameter Groove-Height Relationship, as Applicable (in.) Diameter Groove-Height Relationship, as Applicable (mm) Letter (in.) Minimum Maximum (mm) Minimum Maximum A 1 - - 45 3 - - C 2 9/16 57 3 14 22 F 2 9/16 73 3 14 22 J 3 89 3 6 16
46、 K 4 102 3 6 16 N 6 9/16 152 3 14 22 ANSI/NEMA C29.6-2015 Page 3 2015 National Electrical Manufacturers Association 8.2.3 Critical Impulse Flashover Tests Positive and Negative Three insulators shall be selected at random for the critical impulse flashover test, positive, and three for the critical
47、impulse flashover test, negative, and tested in accordance with 4.7 of ANSI C29.1, “Impulse Flashover Voltage Tests.” Failure of the average critical impulse flashover value of the three insulators to equal or exceed 92% of the rated critical impulse flashover value, as given in the applicable figur
48、e, shall constitute failure to meet the requirements of this standard. 8.2.4 Radio-Influence Voltage Test Five insulators shall be selected at random and tested in accordance with 4.9 of ANSI C29.1, “Radio-Influence Voltage Tests.” If one or more insulators fails to meet the requirements given in th
49、e applicable figure, five additional insulators shall be selected at random and tested. Failure of one or more of these additional insulators shall constitute failure to meet the requirements of this standard. 8.2.5 Thermal Shock Test Five insulators shall be selected at random and tested for 10 complete cycles in accordance with 5.5 of ANSI C29.1, “Thermal Test.” The temperature of the hot water bath shall be approximately 150F (66C), and the temperature of the cold water bath shall be approximately
