1、NEMA Standards PublicationNational Electrical Manufacturers AssociationANSI/NEMA C29.3-2015Wet Process Porcelain Insulators Spool TypeANSI/NEMA C29.3-2015 American National Standard for Wet Process Porcelain Insulators Spool Type Secretariat: National Electrical Manufacturers Association Approved: J
2、uly 29, 2015 Published: September 16, 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 development and approval of
3、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 (ANSI) standards and guideline publications, of which the document contained he
4、rein 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 publication. While NEMA administers the process and establishes rules to promote fai
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9、. Anyone using this document should rely on his or her own independent judgment or, as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any given circumstances. Information and other standards on the topic covered by this publication may be a
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11、 or installations for safety or health purposes. Any certification or other statement of compliance with any health- or safety-related information in this document shall not be attributable to NEMA and is solely the responsibility of the certifier or maker of the statement. ANSI/NEMA C29.3-2015 Page
12、 i 2015 National Electrical Manufacturers Association 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 establishe
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18、Institute. Published by National Electrical Manufacturers Association 1300 North 17th Street, Suite 900, Rosslyn, Virginia 22209 2015 National Electrical Manufacturers Association All rights, including translation into other languages, reserved under the Universal Copyright Convention, the Berne Con
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20、 States of America ANSI/NEMA C29.3-2015 Page ii 2015 National Electrical Manufacturers Association FOREWORD (This Foreword is not part of American National Standard C29.3-2015) The first edition of this standard was issued in 1961 and was based essentially on the EEI-NEMA (Edison Electric InstituteN
21、ational Electrical Manufacturers Association) Standards for Wet-Process Porcelain Insulators (Spool Type), EEI TDJ-53, NEMA 141-1952. Subsequent revisions were developed by the American National Standards Committee on Insulators for Electric Power Lines, ASC C-29. The principal differences between t
22、his edition and the previous (1982) edition are revisions to the color and marking requirements, inclusion of U.S. customary units in the Table of Dimensions, and a change in the acceptance criteria for the transverse strength test. Suggestions for improvement of this standard are welcome. They shou
23、ld be sent by the date 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
24、 Committee (ASC) 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 ASC C29 Committee had the following members: A. Jagtiani, Chairman G. Winstanley, Secr
25、etary Organization Represented: 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.
26、George (alt) J. Varner (alt) ANSI/NEMA C29.3-2015 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)
27、 Bonneville Power Administration D. Liebhaber J. Havel (alt) Tennessee Valley Authority J. Nelson R. Stargel (alt) Western Area Power Administration R. Clark ANSI/NEMA C29.3-2015 Page iv 2015 National Electrical Manufacturers Association Contents Foreword ii 1 Scope 1 2 Referenced Standards 1 3 Defi
28、nitions 1 4 General . 1 5 Material . 1 6 Dimensions and Characteristics 1 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 8.3 Quality Conformance Tests . 2 8.3.1 Dimensional Tes
29、t . 2 8.3.2 Visual Test . 2 8.3.3 Porosity Test 3 8.3.4 Transverse-Strength Test . 3 Appendix . 9 Figures Figure 1 Spool Insulator, Class 53-1 4 Figure 2 Spool Insulator, Class 53-2 5 Figure 3 Spool Insulator, Class 53-3 6 Figure 4 Spool Insulator, Class 53-4 7 Figure 5 Spool Insulator, Class 53-5 8
30、 ANSI/NEMA C29.3-2015 Page 1 2015 National Electrical Manufacturers Association 1 Scope This standard covers spool-type insulators made of wet-process porcelain and used in the transmission and distribution of electric energy. 2 Referenced Standards This standard is intended to be used in conjunctio
31、n with the latest approved revisions of the following standards: ANSI C29.1 Test Methods for Electrical Power Insulators ASTM D 1535 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
32、 in all respects to the 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 dimensi
33、ons due to manufacturing 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 r
34、etesting. If two or more insulators fail to comply, or if any failure occurs during the retesting, the complete lot is considered as not complying with the requirements of this standard. 5 Material 5.1 The insulator shall be made of commercial-grade wet-process porcelain that meets the mechanical an
35、d electrical requirements of this standard. 5.2 The surface of the shells exposed after the assembly shall be glazed for porcelain insulators. NOTEThe most commonly requested color for porcelain is gray. If gray is required, it shall be in accordance with ASTM D 1535, Standard Practice for Specifyin
36、g Color by the Munsell System, and shall conform to Munsell notation 5BG 7.0/0.4 with the 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. 6 Dimensions and Characteristics 6.1 Figures 1-5
37、 (see pages 4-8) are drawings of insulator types. Dimensions and characteristics of the insulators shall be in accordance with these figures. 6.2 When specified, neck designations and dimensions shall be as shown in Table 1. ANSI/NEMA C29.3-2015 Page 2 2015 National Electrical Manufacturers Associat
38、ion Table 1 Neck Designations and Dimensions 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 K 4 102 3
39、 6 16 N 6 9/16 152 3 14 22 7 Marking Each insulator shall include markings to identify: 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
40、 Tests 8.1 GENERAL Tests described in 8.2 shall be required only on insulators of new designs. Tests described in 8.3 shall be required on each lot of insulators. 8.2 DESIGN TESTS 8.2.1 Low-Frequency Dry Flashover Test Three insulators shall be selected at random and tested in accordance with Sectio
41、n 4.2 of ANSI C29.1, “Low-Frequency 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 L
42、ow-Frequency Wet Flashover Test Three insulators shall be selected at random and tested in accordance with Section 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 gi
43、ven in the applicable figure, shall constitute failure to meet the requirements of this standard. 8.3 QUALITY CONFORMANCE TESTS 8.3.1 Dimensional Test Three insulators shall be selected at random from the lot and their dimensions checked against the dimensions on the manufacturers drawing. Failure o
44、f one or more of these insulators to conform, within manufacturing tolerances, to the dimensions on this drawing shall constitute failure of the lot to meet the requirements of this standard. 8.3.2 Visual Test If visual inspection is required on lots of 500 or more insulators, 50 insulators shall be
45、 selected at random from the lot. If more than four but fewer than 10 of the insulators fail to meet the requirements of 5.2, 100 additional insulators shall be selected at random from the same lot. Failure of more than a total of 10 insulators from both the first and second samples shall constitute
46、 failure of the lot to meet the requirements of this standard. ANSI/NEMA C29.3-2015 Page 3 2015 National Electrical Manufacturers Association 8.3.3 Porosity Test A minimum of three specimen samples shall be selected from insulators destroyed in other tests and tested in accordance with Section 5.4 o
47、f ANSI C29.1, “Porosity Test.” Penetration of the dye into the body of the dielectric shall constitute failure of the lot to meet the requirements of this standard. 8.3.4 Transverse-Strength Test Five insulators shall be randomly selected and tested in accordance with Section 5.1.6 of ANSI C29.1, “S
48、pool Insulators (Transverse Strength).” Failure of the strength of any of the five insulators to meet the strength requirements given in the applicable figure shall constitute failure of the lot to meet the requirements of this standard. The re-test procedure in Section 4.3 is applicable to this tes
49、t. ANSI/NEMA C29.3-2015 Page 4 2015 National Electrical Manufacturers Association NOTES: (1) “A” neck (2) All dimensions are in inches. Figure 1 Spool Insulator, Class 53-1 See American National Standard C29.1 Rating Section Mechanical Values Transverse strength, lbs (kN) 2000 (8.9) 5.1.6 Electrical Values Low-frequency dry flashover, kV 20 4.2 Low-frequency wet flashover, kV Vertical 8 4.3 Horizontal 10 4.3 ANSI/NEMA C29.3-2015 Page 5 2015 National Electrical Manufacturers Association NOTE
