Ansi-C29.9-1983 Post Type Insulator

8/3/2019 Ansi-C29.9-1983 Post Type Insulator

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ANSI (299 83 .. 0724150 0004075 7 II A-oC\-o , \ ANSI C29.91983

for wet-process porcelain insulators -apparatus, post-type

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right by the AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)eo 27 13,16,37 1996-,


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ANSI (29.9 83 II 0724150 0004076 9 II

ANSIC29.9-1983R.vlsion of

ANSI C29.91971

American National Standardfor Wet-Process Porcelain Insulators -Apparatus, Post -Type

SecretariatNational Electrical Manufacturers AssociationInstitute of Electrical and Electronics Engineers

Approved December 14, 1982American National Standards Institute, Inc

by the A ME RIC AN N AT IO NAL ST AN DA RD S INS TIT UT E ( AN SI)Sep 27 13d6:37 1996


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ANSI (29.9 83 0724150 0004077 0

AmericanNationalStandard

An American National Standard implies a consensus of those substantially concerned with itsscope and provisions. An American National Standard is intended as a guide to aid the manu-facturer, the consumer, and the general public. The existence of an American National Stan-dard does not in any respect preclude anyone, whether he has approved the standard or not,from manufacturing, marketing, purchasing, or using products, processes, or procedures notconforming to the standard. American National Standards are subject to periodic review andusers are cautioned to obtain the latest editions.The American National Standards Institute does not develop standards and will in no circum-stances give an interpretation of any American National Standard. Moreover, no person shallhave the right or authority to issue an interpretation of an American National Standard in thename of the American National Standards Institute.CAUTION NOTICE: This American National Standard may be revised or withdrawn at anytime. The procedures of the American National Standards Institute require that action betaken to reaffirm, revise, DT withdraw this standard no later UUIn five years from the dateof approval. Purchasers of American National Standards may receive current informationon all standards by calling or writing the American National Standards Institute.

Published byAmerican National Standards Institute1430 Broadway, New York, New York 10018

Copyright 1983 by American National Standards Institute, IncAll rights reserved.No part of this publication may be reproduced in any form,in an electronic retrieval system or otherwise, withoutthe prior written permission of the publisher.Printed in the United States of AmericaAIM683/6

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by th e A ME RIC AN N AT IO NA L S TA ND AR DS IN ST IT UT E ( AN SI)"", 27 13016,37 1996


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ANSI (299 63 .. 0724150 0004078 2 ..

Foreword (This Foreword is not a part of American National Standard C29.9-1983.)it The first edition of this standard was based essentially on the EEI-NEMA (Edison ElectricInstitute-National Electrical Manufacturers Association) Standards for Wet-Process Por-celain Insulators (Apparatus, Post-Type), EEl TDI-59, NEMA 147-1956. It was developedby the American National Standards Committee on Insulators for Electric Power Lines,C29.This standard has been revised three times by the C29 Committee. This third revision(1) makes numerous editorial changes deemed to improve clarity; (2) removes porcelaincolor as a requirement; (3) changes the test description for ferrous metal parts galvaniz-ing; (4) moves packing requirements to an appendix; (5) requires electrical tests to bemade on completely assembled insulators; (6) revises the mechanical prooftest require-ments; (7) increases routine tension test values to 50 percent of rating; and (8) adds optional routine cantilever and bending movement tests. .Suggestions for improvement of this standard will be welcome. They should be sent tothe National Electrical Manufacturers Association, 2101 L Street, sw , Washington,D.C. 20037.This standard was processed and approved for submittal to ANSI by American NationalStandards Committee on Insulators for Electric Power Lines, C29. Committee approvalof the standard does no t necessarily imply that all committeemembers voted for its ap-proval. At the time it approved this standard, the C29 Committee had the followingmembers: ..O. Compton, ChairmanC. H. White, Secretary

Orzanization Represented Name of RepresentativeAssociation of American Railroads (AAR) .................... (Representation Vacant)Electric Light and Power Group ................... , 1; B. Filch. A. S. JagtianiW.C. LauthR. F. Lehman

I.WeberE. F _Marchbank (All)I.1' . Markey.(Alt) .

Institute of Electrical and Electronics Engineers . : ....... 0. Compton .T. A. PinkhamW. E. RichardN. E. Spauldlng (ALI)National Electrical Manufacturers Association .. .- .......... A. C. BakerG. A. BolinR. Drideweser1. W.,CarterB. E. KingsburyJ. L. NichollsII. J. SandwickA. E. SchwalmU.S. Department of the Army (Liaison) ................. .1. S. RobertsonU.S. Department o f Energy .. ; : .................... - - .R. L. Brown

by th e A ME RIC AN N AT IO NA L S TA ND AR DS IN ST IT UT E ( AN SI)~'P 27 13,16,37 1996


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ANSI (29.9 83 .. 0724150 0004079 4 ..

Contents SECTION PAGE1. Scope 52. Definitlons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 53. General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 54. Material. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 55. Dimensions and Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 56. Marking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 67. Samples, Inspection, and Tests '.' " 67.1 General.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67.2 Design Tests. . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . 67.3 Quality Conformance Tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 67.4 Routine Tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 78. Referenced American National Standards . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7Tables

Table 1 Dimensions and Characteristics of Post-Type ApparatusInsulators 350 Kilovolts Basic Impulse Insulation Level (BIL) and Below . . 8

Table 2 Dimensions and Characteristics of Post- Type ApparatusInsulators above 350 Kilovolts Basic Impulse Insulation Level (BIL) 9

Figure 1 Tolerances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10AppendixesAppendix A Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Appendix B Additional Electrical Design Tests ........................ 11

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by th e A ME RIC AN N AT IO NAL S TA ND AR DS IN STIT UT E ( AN SI)Sep 27 13,16,37 19 96


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ANSI (29.9 83 .. 0724150 0004080 0 ..

American National Standardfor Wet-Process Porcelain InsulatorsApparatus, Post -Type

1: ScopeThis standard covers outdoor high-voltage post-typeapparatus insulators made of wet-process porcelainand used in the transmission and distribution of elec-trical energy .

2. Definitions2.1 See Section 2 of American National StandardTest Methods for Electrical Power Insulators, ANSIC29.1-1982, for definitions or terms.2.2 In this standard the word "insulator" shall referto a unit or to a stack of two or more units.2.3 The technical reference numbers appearing intables are a widely used and recognized identificationseries for apparatus insulator units or stacks.

3. General3.1 Insulators shall conform to all respects to the re-quirements hereinafter stated. The text and tables sup-plement each other and shall be considered as part ofthis standard.3.2 Some insulators are tapered and may contain unitsthat have certain characteristics whose strengths ex-ceed those given in the tables. Each unit shall complywith the manufacturer's strength requirements.3.3 Manufacturers' drawings, if furnished, shall showthe outline of the insulators, together with all pertinentdimensions. Any variations in these dimensions due tomanufacturing tolerances shall be indicated.

4. Material4.1 Insulators shall be made of good commercial gradewet-process porcelain.4. Z The entire porcelain surface of the insulators thatwill be exposed after assembly shall be glazed. The en-tire porcelain surface shall be relatively free from im-perfections. Color is not a part of this standard. Ifgrayis required, it shall be in accordance with AmericanNational Standard Gray Finishes for Industrial Appara-tus and Equipment, ANSI Z55.1-1967 (R1913), andconform to Munsell notation sBG 7.0/004 with thefollowing tolerances:

(1) Hue: 12 (3G to 78)(2) Color: 0.5(3) Chroma: -0.2 to + 0.6

4.3 Metal parts shall be made of a good commercialgrade of malleable iron, ductile iron, or steel. Ferrousparts other than stainless steel shall be galvanized inaccordance with Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware, ASTM A15380.1

5. Dimensions and Characteristics5.1 Dimensions and characteristics of the insulatorsshall be in accordance with Tables 1 and 2 andFigure 1.5,2 Shell diameters given for the insulators listed inTable 1 shall not be exceeded bymore than three per-cent to ensurephysical clearances in assembled ap-paratus.5.3 Minimum dimensions are limited by other speci-fied characteristics.

'Copies are available from ASTM, 1916 Race Street , Phi ladel-phia, PA 19103.

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by the A ME RIC AN N AT IO NA L S TA ND AR DS IN ST IT UT E ( AN SI)ep 27 13,16,37 1996


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AMERICAN NATIONAL STANDARD C29.9-1983ANSI (29.9 83 .. 0724150 0004081 2 ..

6. MarkingEach insulator unit shall bear symbols identifying themanufacturer and giving the year of manufacture. Themarking shall be legible and durable.

7. Samples, Inspection, and Tests7.1 General. Tests descrlbed in 7.2 shall be requiredonly on insulators of new designs. Tests describ ed in7.3 shall be required 011 eaeh lot of insulators. Testsdescribed in 7.4 shall be made on each insulator. Elec-trical tests described in 7.2 shall be conducted on com-pletely assembled insulators.~ 7.2.1 Low-Frequency Wet Withstand. Three insula-tors shall be selected at random and tested in accordancewith 4.5 of ANSI C29 .11982. Failure of any insulatorto meet the rated wet withstand value, as given in theapplicable table, shall constitute failure to meet therequirements of this standard.

7.2.2 Critical-Impulse Flashover, Positive. Threeinsulators shall be selected at random and tested in ac-cordance with 4.7 of ANSI C29.11982. Failure of theaverage critical-impulse flashover value of the three In -sulators to equal or exceed 92 percent of the ratedcrltical-impulse flashover value, as given in the ap-plicable table, shall constitute failure to meet the reoquirements of this standard.

7.2.3 Impulse Withstand. Three insulators shall beselected at random and tested in accordance with 4.8of ANSI C29.119S2. Failure of any insulator to meetthe rated impulse-withstand value, as given in theap-plioable table, shall constitute failure to meet the re-quirements of this standard.

f 7.2.4 RadioInfluence Vo~e (RIV). Three insula-tors shall be selected at random and tested in ac-cordance with 4.9 of ANSI C29.11982. If one or moreinsulators fail to meet the requirements given in theapplicable table, three additional insulators shall beselected at random and tested. Failure of one or moreof these additional insulators shall constitute failureto meet the requirements of this standard.7.2.S Thermal Shock. Three insulators shall beselected at random and tested for ten complete cyclesin accordance with 5.5 of ANSI C29.1-1982. Formultiunit Insulators, three of each type of unit in thestack shall be tested. The temperature of the hot-waterbath shall be approximately 150F (66C) and thetemperature of the cold-water bath shall be approxi-mately 39F (4C). At the end of the tenth cycle,6

the test specimens shall be checked for electricalsoundness. If one insulator fails, three additional in.sulators shall be selected at random and tested. Failureof more than one insulator from the first sample, orfrom the first and second samples combined, shallconstitute failure to meet the requirements of thisstandard.

7.2.6 Compression Strength. Three insulators shallbe selected at random and tested in accordance with5.1.4.4 of ANSI C29.11982. For multiunit Insula-tors, three of each type of unit in the stack shall betested. Failure of the average strength of the three in.sulators or units to meet the strength requirementsgiven in the tables or to meet the specified higherstrength requirement, where applicable, or failure of .anyone insulator or unit to equal 85 percent of thatstrength requirement shall constitute failure to meetthe requirements of this standard.

7.2.7 Torsional Strength. Three insulators shall beselected at random and tested in accordance with5.104.2 of ANSI C29.11982. For multiunit insula.tors, three of each type of unit in the stack shall betested. Failure of the average strength of the threeinsulators or units to meet the strength requirementsgiven in the tables or to meet the specified higherstrength requirement, where applicable, or failure ofanyone insulator or unit to equal 85 percent of thatstrength requirement shall constitute failure to meetthe requirements of this standard.7.3 Quality Conformance Tests''

7.3.1 Visual and Dimensional Tests. Conformitywith 4.2 may be determined by visual inspection. Allinsulators not conforming to 4.2 fail to meet the reoquirements of this standard.

Three insulators shall be selected at random fromthe lot and their dimensions checked against the di-mensions of the manufacturer's drawing. Failure ofmore than one of these insulators to conform to thedimensions on the drawing shall constitute failure ofthe lot to meet the requirements of this standard.

7.3.2 Porosity. Test specimens shall be selectedfrom insulators destroyed in other tests and tested in. accordance with 5.4 of ANSI C29.11982. Penetra-tion of the dye into the body of the dielectric shallconstitute failure of the lot to meet the requirementsof this standard.

7.3.3 Galvanizing Test. Five pieces representativeof each type of galvanized hardware used with the In -sulators shall be selected at random and tested in ac-

Substantia l experience indicates tha t a total of one-half per-cent of the number of insulators in the. lot ls sufficient toestablish characteristics demonstrable by destructive tests,

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h t b y t he A ME RIC AN N AT IO NA L S TA ND AR DS IN ST IT UT E ( AN SI)p 27 13,16,37 199 6


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ANSI (29.9 83 .. 0724150 0004082 4 IIAMERICAN NATIONAL STANDARD C29.9-1983

cordance with Section 6 of ANsr C29.1-1982. Fiveto ten measurements shall be uniformly and randomlydistributed over the entire surface. The average thick-ness value for each individual specimen and the averageof the entire sample shall equal or exceed the following:

Average ofIndividualSpecimenardware

Average ofEntire Sample

Hardware .(except nuts/bolts)

Nuts/bolts3.4 mil 3.1mll2.1 mil l.7 mil

I- . . . . . . '

If the average of one specimen, or if the average ofthe entire sample, fails to comply with the above. tenadditional pieces of the same type of hardware shall beselected at random and tested. Failure of the retestsample to comply with the minimum thickness criteriashall constitute failure of the lot to meet the require-ments of this standard.

7.3.4 Cantilever Strength. Three insulators shall beselected at random and tested in accordance with5.1.4.1 of ANSI C29.1-1982. For multiunit insulators,three of each type of unit in the stack shall be tested.The units may be tested in a stack or individually.Failure of the average strength of the three insulatorsor units to meet the strength requirements given inthe tables or to meet the specified higher strengthrequirement, where applicable, or failure of anyoneinsulator or unit to equal 85 percent of that strengthrequirement shall constitute failure to meet the re-quirements of this standard.

7.3.5 Tensile Strength. Three insulators shall beselected at random and tested in accordance with5.1.4.3 of ANSI C29.11982. For multiunit insulators.three of each type of unit in the stack shall be tested.Failure of the average strength of the three insulatorsor units to meet the strength requirements given in thetables or to meet the specified higher strength require-ment, where applicable, or failure of anyone insulatoror unit to equal 85 percent of that strength require-ment shall constitute failure to meet the requirementsof this standard.7.4 Routine Tests

7.4.1 Flashover. Each hollow-core insulator unitshall be subjected to a routine flashover test beforeassembly in accordance with 7.1 of ANSI C29.11982.For this test, an electrode shall be placed on eachside of, and adjacent to, the porcelain barrier. All unitsthat puncture fail to meet the requirements of thisstandard.7.4.2 Mechanical Proof

7.4.2.1 Each insulator of the type given in Table] shall be subjected to one of the following tests.

(1) A tension test in accordance with 5.1.4.3 ofANSI C29.1-1982. The load applied shall be not lessthan 50 percent of the tension strength shown in thetable.

(2) A cantilever test in accordance with 5.1.4.1 ofANSI C29.1-1982.. The load applied shall be not lessthan 40 percent of the cantilever strength shown inthe table. The test shall be performed in each of thefour quadrants.

Successful completion of either the tension testor cantilever test shall constitute demonstration ofconformance with the requirements ofthis standard.

7.4.2.2 Each insulator of the type given inTable 2 shall be subjected to one of the followingtests.

(1) A tension test in accordance with 5.1.4.3 ofANSI C29 .1-1982. The load applied shall be not lessthan 50 percent of the tensile strength shown in thetable.

(2) A cantilever test in accordance with 5.1.4.1of ANSI C29.1-1982. The load applied shall be notless than 40 percent of the cantilever strength shownin table. The test shall be performed in each of thefour quadrants.

(3) A bending moment test inwhich the bendingmoment simultaneously loads each end of the unit inproportion to the unit rating. The test shall be repeatedin each of the four quadrants. The proof test momentshall be not less than 40 percent of the bendingmoment rating of the unit.

Successful completion of either the tension test orthe cantilever test or the bending moment test shallconstitute demonstration of conformance With therequirements of this standard. A unit rated higher thanthe stack in which it is contained shall be tested at50 percent of the tension rating of the unit or at 40percent of the cantilever or bending moment ratingof the unit, as applicable.

8. Referenced American National StandardsWhen the following American National Standards refer-red to inthis document are superseded by a revisionapproved by the American National Standards Institute,Inc, the revision shall apply:American National Standard Test Methods for Elec-trical Power Insulators, ANSI C29.1-1982American National Standard Gray Finishes for Indus-trial Apparatus and Equipment. ANSI Z55.l1967(R1973)

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ight by the A MERICAN NATIONAL S TAND ARD S INS TITU TE (A NSI)Sep 27 13,16,37 1996


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Ansi-C29.9-1983 Post Type Insulator