ANSI C29.3-1986 - Wet-Process Porcelain Insulators Spool Type

7/27/2019 ANSI C29.3-1986 - Wet-Process Porcelain Insulators Spool Type

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ANSI C29.3-1986

for wet process porcelain insulators -spool type



A N S I @C29.3-1986

Revis ion ofANSI C29.3-I980

American National Standard

for Wet Process Porcelain Insulators -Spool Type

Secretar iat

National Electr ical Manufacturers Associat ion

Approved October 2,1986

Am erican Nation al Standards Inst i tute, Inc -



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Standard

Published by

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Copyright O 1986 by American N ational Standards Institute, Inc

All rights reserved.

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Printed in the United Sta tes of America

AlM1186/7



(ThisForeword is not part of Am erican National Standard C29.3-1986.)ForewordTh e first edition of this standard was issued in 1961 and was based essentially on the EEI-

NEMA (Edison Electric Institute-Na tional Electrical Man ufacturers Assoc iation) Sta n-

dards for Wet-Process Porcelain Insulators (Spool T ype), E EI T DJ-53, NEMA 141-1952 .

Subsequent revisions were developed by the American National Standards Comm ittee on

Insulators for Electric Power Lines, C29.

The principal differences between th e 1977 and 1961 editions were: a change of colorrequirements; addition of neck designations, dimensions, and tolerances; deletion of re-

quireme nts for manufacturer’s production sam pling and tests; and deletion of the state-

ment regarding certified test data with regard to design tests. In t he 1980 edition, all

values were converted from U.S customary units to SI units. The 1986 edition moves

Section 7, Packaging, to the Appendix.

Suggestions for im provement of this standard will be welcome. They should be sent t o

NationalElectricalManufacturersAssociation,2101L Street, NW ,Washington,DC 20037.

This standard was processed and approved for submittal to AN SI by A ccredited Standards

Com mittee o n Insulators for Electric Pow er Lines, C29. Com mittee approval of t he stan-

dard does n ot necessarily imply th at all comm ittee members voted for its approval.A t

the time it approved thisstandard, the C 29 Com mittee had the following members:

Olin Compton , Chair

Joh n A. G authier, Secretary

Organization Represented Name ofRepresentative

Bonneville Power Ad ministration. . . . . . . . . . . . . . . . . . . . . . . . . . Robert L.BrownElectric Light and Power Group. . . . . . . . . . . . . . . . . . . . . . . . . . . G. A. Cook

A. S. JagtianiJ. F. KarcherE. F. MarchbankJ. WeberD. E. Soffrin (Ait)

Institute of Electrical and Electronics Engineers . . . . . . . . . . . . . . . . . O. ComptonT.A. PinkhamW. . RichardN. E. Spaulding (Ait)

National E lectrical Manufacturers Association . . . . . . . . . . . . . . . . . . A. C . BakerJ.W. arterR. HarapR.HarmonB. E. KingsburyJ. L.Nicho&J. D. SakichA. E. SchwalmH. V an Herk (Ait)

U.S.Department of the Army. . . . . . . . . . . . . . . . . . . . . . . . . . . . H. Snyder

Individiral Memb er

G . A. Davidson



PAGEContents SEmloN

1 . S c o p e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2 . Referenced American National Standards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4.General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

5. Material. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

6 . Dimensions and Characteristics 5

7.Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

8. Sampling, Inspectio n. and Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

8.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8.2 DesignTests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

8.2.1 Low-Frequ ency Dry Flashover Test . . . . . . . . . . . . . . . . . . . . . . . . . 68.2.2 Low-Frequ ency Wet Flashover Test . . . . . . . . . . . . . . . . . . . . . . . . . 6

8.3 Quality Conformance Tes ts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

8.3.1 Dimensional Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

8.3.2 Visual Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

8.3.3 Porosity Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68.3.4 Transverse.StrengthTest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1 Neck D esignations and D imensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figures

Figure 1 Spool Insulator. Class 53-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure3 SpoolInsulator.Class53-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 2 Spo ol Insulator. Class 53-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 4 Spoo l Insulato r, Class 53.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 5 Spoo l Insulator, Class 53-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Appendix Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12



American National Standard

for Wet Process Porcelain Insulators -Spool Type

1. Scope

This standard covers spool-typ e insulators made of we t-

process porcelain and used in th e transmission and dis-

tribution of electric energy.

2. Referenced A merican National Standards

This standard is intended to be used in conjunctionwit h the following American National Standards. When

the referenced standards ar e superseded by a revision

approved by the American National Standards Institute,

Inc, the revision shall apply,

ANSI C29.1-1982, Test Methods for Electrical Power

Insulators

ANSI 255.1-1 967 (R 1973), G ray Finishes for Indus-

trial Apparatus and Equipment

3. Definitions

5.2 The entire surface of the insulator, w ith the ex-

ception of a firing surface, shall be glazed. Th e entire

surface shall be relatively free from imperfections.

Color is no t a part of this stan dard. If gray is require d,

it shall be in accordance with ANSI 255.1-1967

(R1973), and conform to Munsellnotation 5BG 7.0/0.4

with the following tolerances:

(1) Hue: f 12 (3G to 7B)

(2) Value: f 0.5

(3) Chroma: -0.2 t o t0 .6

6. Dim ensions and Characteristics

6.1 Figures 1 through 5 (see pages 7-1 1) are drawings

of insulator ty pes. Dim ensions and characteristics of

th e insulators shall be i n accordance with these figures.

6.2 When specified, neck designations and dimensions

shall be as sh own in Table 1.

See Section 2 of ANSI C29.1-1982 for definitions of

terms.7. Marking

4. General

4.1 Insulato rs shall conform in al i respects to the re-

quirements of th is standard, The text and figures sup-

plement each other and shall be considered part of

this standard

4.2 Manufacturer’s drawings, if fu rnished, shall showthe o utline of the insulators, together with all pertinen t

dimensions, Any variations in th ese dimension s due t o

manufacturing tolerances shall be indicated.

5. Material

5.1 The insulators shall be mad e of good co mmercial-

grade w et-process porcelain.

Each insulator shall bear a sy mbol identifying the

man ufacture r. The marking shall be b oth legible anddurable.

Table 1

Neck Designations and Dimensions

DesignationLetter

Diameter(millimeters)

Groove-Height Relationshipas Applicable (millimeters)

Minimum Maximum

A 45 f 3C 51 f 3F 7 3 f 3J 89 f 3

K 102f 3N 152f 3

-

14 2214 226 166 16- -

5



AMERICAN NATIONAL STAN DARD C29.3-1986

8. Sampling, Inspection, and T ests

8.1 Gen eral. Tests described in 8.2 shall be required

only on in sulators of new designs. Tests described in

8.3 shall be required’on each lot of insulators.

8.2 Design Tests

insulators shall be selected at random and tested inaccordance with 4.2 of ANSI C29.1-198 2.Failure

of t he average dry flashover value of th e three insula-

tors to equal or exceed 95 %of the rated d ry flash-

over value, as given in the applicable figure, shall con-

stitute failure to m eet the requirements of this stan-

dard.

8.2.2 Low -Frequen cy Wet Flashover Test. Three

insulators shall be selected at random and tested in ac-

cordance with 4.3 of ANSI C29.1-19 82.Failure of the

average wet flashover value of th e three insulators t o

equal or exceed 9% of th e rated w et flashover value,

as given in th e app licable figure, shall cons titute failureto meet the requirements of this standard.

8.3 Quality Conformance Tests’

8.3.1 Dimensional Test. Three in sulators shall be

selected at random from th e lot and their dim ensions

8.2.1 Low-Frequency Dry Flashover Test. Three

Substantial test experience indicates that a total of 1/2%ofthe number of insulators in the lot is sufficient to establishcharacteristics demonstrable by destructive tes ts.

6

-___-I-

checked against the dimensions on the manufacturer’s

drawing. Failure of more than one of these insulators

to conform , within manufacturing tolerances, to th e

dimensions on this drawing shall constitute failure of

the lot t o meet th e 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 selected at random from th e lot. If more than 4 but

fewer tha n 10 of th e insulators fail to m eet the require-ments of 5.2, 100 additional in sulators shall be se lected

at random from the same lot. Failure of more than a

total of 10 insulators from b oth the first and second

samples shall constitute failure of the lot to m eet th e

requirements of this standard.

8.3.3 Porosity Test. Spe cimen s shall be selected

from insulators destroyed in other tests and tested

in accordance with 5.4 of ANSI C29.1-19 82.Penetra-

tion of th e dye jnto t he body of the dielectric shall con-

stitute failure of the lot t o meet the requirements of

this standard.

8.3.4 TransverseStrength T est, Five insulators

shall be selected at random and tested in accordance

with 5.1.6 of ANSI C29.1-1982.Failure of the aver-

age strength of th e five insulators t o meet the strength

requirem ents given in th e applicab le figure, or failure

of any one insulator to equal 85 % of that strength re-

quirement, shall constitute failure of the lot t o meet

the requirements of this standard.



AMERICAN NATIONAL STANDARD C29.3-1986

13

GROOVE MUST SEANOT LESS THAN21 D I A M A N D R E L

P4 5 7 - + (NOTE1112 1.5

18 + 1.5-0

22 5.1.5

NOTES :(1 ) “A ” neck.(2 ) AU dimen sions are in m illimeters

Mechanical Values

Rating

Transverse strength, newton s 890 0

Electrical V aluesLow-frequency dry flashover, kilovolts 20

Vertical 8Horizontal 10

Low-frequency wet flashover, kilovolts

See American NationalStandard C29.1 -1982

Section

,5.1.6

4 .2

4.34 .3

Figure 1

Spool Insulator, Class 53-1

7



AMERICAN NATIONAL STAN DARD C29.3-1986

-79 p - 4 5 2 3 (NOTE . 5 1ì - r

NOT LESS THAN33 DIA MANDREL

1 /------I A\

192 3 \ir38

GROOVE MUST SEAT 76 i 1.5

NOTES:(1 ) "A" neck.(2) Ali dimensions are in m illimeters

Mechanical Values

Electrical Values

Transverse strength, newtons

Low-frequency d ry flashover, kilovolts

Low-frequency we t flashover, kilovoltsVerticalHorizontal

L A - 4 2 1.5

Rating

13300

25

1215

I

-8 t 1.5-0

See American NationalStandard C29.1-1982

Section

5.1.6

4.2

4.34.3

Figure 2


8



AMERICAN NATIONA L STANDARD C29.3-1986

GROOVE MUST SEATNOT LESS THA N21 DIA MANDREL

18 + 1.5-0

24 2 1.5

NOTES :

(i) A” neck.

(2 ) Ail dimensions are in millimeters

RatingMechanical Values

Electrical Values

Transverse strength, newtons 178 00

Low-frequencydry flashover, kilovolts 25

Vertical 12

Horizontal 15

Low-frequencywet flashover, kiiovolfs

Figure3


See American National

SectionStm datd C29.1-1982

1.5

5.1.6

4.2

4.34.3

9



AMERICAN NATIONAL STANDAR D C29.3-1986

GROOVE M US T SEATN O T LESS THAN30 D I A M AN D R EL

NOTES:(i) “F” neck.(2 ) AU dimensions are in millimeters

Rating-Mechanical Values

Electrical Values

Transverse strength, newtons 20000

Low-frequency dry flashover, kilovolts 25

Low-frequency wet flashover, kilovoltsVertical 12Horizontal 15

Figure4


10

See American NationalStandard C29.1-1982

Section

5.1.6

4.2

4.34.3



AMERICANNATIONAL STANDARD C29.3-1986

I = 102i 31 1 73 2 3 ( NOT E I)

GROOVE MUS T SEATNOT LESS THAN21 DIA M A NDRE L

I ’ II

I

I

I

hL----JI

I lI l

52.5

I

I

II I1

I1 I

181t1.5-0i42 1.5

NOTES:(1 ) ‘IF” eck.(2 ) Ail dimensions are in m illimeters

Rating

Transverse strength, newtons 267 00Mechanical Values

Electrical Values

-

Low-frequency dry flashover, kilovolts 35Low-frequ ency wet flashover, kilovolts

Vertical 18Horizontal 25

See Am erican NationalStandard C29.1-19 8 2

Section

5.1.6

4 .2

4 .34.3

I

‘ 3

Figure 5


11



(This Appendix is not par t of American N ational Standard C29.3-1986, ut is included for informa-Appendix tion only.)

Packaging

Packaging of insulators should be such as to afford reasonable and proper p rotec tion to the

insulators in shipping and handling.

Each box or container should be marked w ith the number of pieces contained therein; th e cata-

log number, or class num ber, or description of th e co nten ts; and th e manufacturer’s name.

12



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ANSI C29.3-1986 - Wet-Process Porcelain Insulators Spool Type

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Transcript of ANSI C29.3-1986 - Wet-Process Porcelain Insulators Spool Type