SIST HD 474 S1:1998

SLOVENSKI STANDARD
SIST HD 474 S1:1998
01-februar-1998
Dimensions of ball and socket couplings of string insulator units
Dimensions of ball and socket couplings of string insulator units
Maße von Klöppel-Pfannen-Verbindungen für Kettenisolatoren
Dimensions des assemblages à rotule et logement de rotule des éléments de chaînes
d'isolateurs
Ta slovenski standard je istoveten z: HD 474 S1:1986
ICS:
29.080.10 Izolatorji Insulators
SIST HD 474 S1:1998 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST HD 474 S1:1998

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SIST HD 474 S1:1998

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SIST HD 474 S1:1998

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SIST HD 474 S1:1998
CEI
NORME
INTERNATIONALE IEC
120
INTERNATIONAL
Troisième édition
STANDARD
Third edition
1984
1982 a été incorporé dans cette réimpression
Le contenu du corrigendum de mai
The contents of the corrigendum of May 1982 has been included in this reprint
Dimensions des assemblages à rotule et
logement de rotule des éléments de chaînes
d'isolateurs
Dimensions of ball and socket couplings of
string insulator units
réservés Copyright — all rights reserved
CO CEI 1984 Droits de reproduction —
No part of this publication may be reproduced or utilized in
Aucune partie de cette publication ne peut être reproduite ni
any form or by any means, electronic or mechanical,
utilisée sous quelque forme que ce soit et par aucun pro-
including photocopying and microfilm, without permission
cédé, électronique ou mécanique, y compris la photocopie et
in writing from the publisher.
les microfilms, sans l'accord écrit de l'éditeur.
Bureau Central de la Commission Electrotechnique Internationale 3, rue de Varembé Genève, Suisse
Commission Electrotechnique Internationale CODE PRIX
International Electrotechnical Commission PRICE CODE
Q
IEC MeeayHapopHaa 3neKTpoTexHH g ecnaa KOMHCCHR
• Pour prix, voir catalogue en vigueur
•
For price, see current catalogue

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SIST HD 474 S1:1998
120 © I E C 1984 — 3
CONTENTS
Page
FOREWORD 5
PREFACE 5
Clause
1. Scope 7
2. Object 7
3. Plan of the standard 7
4. Pin ball 7
5. Socket 9
6. Hook-on "GO" gauge 9
7. Lower part of the insulator 9
8. Locking device 9
10
9. Dimensions of the pin ball
11
10. Dimensions of the socket end
12
11. Dimensions of the hook-on "GO" gauge
14
12. Dimensions of twin-balled pins
15
13. Clearance between the pin ball and the socket end
16
14. Effectiveness of locking the pin ball
17 15. Dimensions of the hole for the split-pin
18
16. Dimensions of the hole for the W-clip
A — Sliding position and over-tilting position of the pin ball in the socket end . 19
APPENDIX
21 APPENDIX B — Recommended gauges

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SIST HD 474 S1:1998
— 5 —
120©IEC 1984
INTERNATIONAL ELECTROTECHNICAL COMMISSION
DIMENSIONS OF BALL AND SOCKET COUPLINGS
OF STRING INSULATOR UNITS
FOREWORD
1) The formal decisions or agreements of the I E C on technical matters, prepared by Technical Committees on which all the
National Committees having a special interest therein are represented, express, as nearly as possible, an international
consensus of opinion on the subjects dealt with.
they are accepted by the National Committees in that
2) They have the form of recommendations for international use and
sense.
In order to promote international unification, the I E C expresses the wish that all National Committees should adopt the text
3)
ce between the
of the I E C recommendation for their national rules in so far as national conditions will permit. Any divergen
tional rules should, as far as possible, be clearly indicated in the latter.
I E C recommendation and the corresponding na
PREFACE
This standard has been prepared by Sub-Committee 36B: Insulators for Overhead Lines, of I E C
Technical Committee No. 36: Insulators.
It replaces the second edition of I E C Pub lication 120 (1977).
The text of this standard is based upon the following documents:
Six Months' Rule Report on Voting
81A
36B(CO)78 36B(CO)81 and
Further information can be found in the Repo rts on Voting indicated in the table above.
The following I E C publications are quoted in this standard:
and Pin Type.
Publications Nos. 305 (1978): Characteristics of String Insulator Units of the Cap
372 (1984): Locking Devices for Ball and Socket Couplings of String Insulator Units — Dimensions and
Tests.
433 (1980): Characteristics of String Insulator Units of the Long Rod Type.

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SIST HD 474 S1:1998
120 © — 7 —
IEC 1984
DIMENSIONS OF BALL AND SOCKET COUPLINGS
OF STRING INSULATOR UNITS
1. Scope
This standard applies to string insulator units of the cap and pin and long rod types and their
associated metal fittings.
2. Object
The object of this standard is to define the dimensions of a series of standard ball and socket
couplings using the standard locking devices (see I E C Publication 372: Locking Devices for Ball
and Socket Couplings of String Insulator Units) in order to permit the assembly of insulators or
metal fittings supplied by different manufacturers.
Note. — Only the dimensions necessary for assembly are dealt with in this standard. Properties of material and working
loads are not specified. The co-ordination of dimensions with strength classes is specified in I E C Publications
305: Characteristics of String Insulator Units of the Cap and Pin Type, and 433: Characteristics of St ring
Insulator Units of the Long Rod Type.
Plan of
3. the standard
This standard includes s ix standard sizes designated by the nominal pin diameters which form
the basis of the standard. Each standard size is defined by the dimensions of the pin ball, of the
socket and of the hook-on "GO" gauge specified in Clauses 9 to 11. Dimensions of twin-balled pins
for coupling of two sockets are stated in Clause 12. Clearance and locking conditions are tabulated
in Clauses 13 and 14. Dimensions of the hole for the locking device are stated in Clauses 15
and 16.
All dimensions are expressed in millimetres.
For the pin ball and the socket, dimensions apply to the finished product after any surface
treatment.
Extreme positions of the pin ball in the socket are given in Appendix A.
Typical examples of gauges for checking the dimensions of pin balls and sockets are given in
Appendix B.
4.
Pin ball
The pin ball shall conform to the dimensions specified in Clause 9. The main dimensions
governing the shape of the pin ball are h t, d2, rt and r2. Dimension r3 is given for guidance because
its accurate value may be obtained only by the drawing. In addition, the shank diameter d 1, must
not exceed the specified values within a length equal to H 3 of the corresponding worn hook-on
"GO" gauge (see Clause 11).

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SIST HD 474 S1:1998

120 © I E C 1984 — 9
Socket
5.
The socket interior shall conform to the dimensions specified in Clause 10, which also specifies
the minimum thickness of the locking device.
Sockets according to the clause mentioned are shown with flat bottoms. Sockets with rounded bottoms with
Notes 1. —
radii of curvature not less than the dimensions r2 of the pin balls can also be used. In this case, the dimensions
R, have to be correspondingly decreased.
2. — The 16 mm standard size according to Clause 10 includes two alternative sockets. The reason for this is that,
d, there is a need for a socket fitting exactly the standard pin ball and its predecessors with
on the one han
2
r^ = 23 (alternative A) and, on the other hand, there is a need for a socket also accepting pin balls with r . 50
H1, H an T. Alternative
(alternative B). Alternative A and alternative B are identical except for dimensions 2 d
A, having the smaller dimensions, is preferable where assembly with existing pin balls does not require
alternative B.
Hook-on "GO" gauge
6.
The external dimensions of the socket have not been laid down. However, the socket shall
permit acceptance of the hook-on "GO" gauge according to Clause 11.
7. Lower part of the insulator
The shape of the lower part of the insulator shall be such that assembly with the socket of
maximum external dimensions according to Clause 6 will always be possible.
8. Locking device
The locking device, i.e. a split-pin or W-clip, shall be designed for locking the minimum-size pin
ball in the maximum size socket. This requirement is fulfilled if the locking devices standardized
in I E C Publication 372 are used.

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SIST HD 474 S1:1998
120 © C E I 1984
— 10 —
9. Dimensions de la tige à rotule
Dimensions of the pin ball
d,
h,
d2
181177
Désignation
de l'assemblage
r3*
d, dZ h, r1 r r4
Designated size
of coupling
1,5+ô
11 11,941 22,843 9,142 35 35 3,5
13,443 23 50 3
16 17_7,22 33,3_7,5
3t ,5
21 4146 19,544 27 60 5,7 3,5+I
20
_7,3
70 6,6
24 2544 4948 2147 40
4+1,5
57_7,9 23,5_7,8 55 80 8 4,5+
28 29_7,5
i'
6541 27_7,9 70 90 10 5+
32
33—?,6
1,5
indicatif.
* Donné à titre
Given for guidance.

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SIST HD 474 S1:1998
120 © I E C 1984
10. Dimensions du logement à rotule
Dimensions of the socket end
D,
Assemblage 16 B, 20
Assemblage 11, 16A, 24, 28, 32
Coupling
Coupling
112
H23)
pour
agrafes pour
goupilles
et
variantes norma-
Désignation
de l'assemblage lisées z
de
2)
R5 T
H, R4
R, R3
D, D2 D3 goupilles
Designated size
of coupling for
for
W-clips
and standard
alternative split-pins
split-pins
Min. Min. Min.
Min. Min.
16,3 35 4 1,5 4 4,8
11 12,5+ 03 24,5 24,5 10,5+0,3 15,5
14,5+46 20,5 21,6 23 3 3 5 5,5
16 A 1) 19,2+0;6 34,5 34,5
+ ô
B1) >6
25 25,5 23 3 3 5 7,9
16 19,2+4,6 34,5 34,5 17
20,5+24,1
+ô 1
28,5 29,3 27 6 3,5 7 7,0
20 23 42,5 42,5
24,5
42,5
32,5 33,5 40 5 4 10 8,7
24 27,5+ 51 51 23,5+
24,9 24,9
26+ 36,5 37,4 55 8 4,5 12 10
28 32+ 59 59
0,3
0,3
42 43 70 10 5 14 11,5
32 36+ 67,5 67,5 30+
1)Voir la note 2 de l'article 5
See Note 2 of Clause 5.
2) Hauteur du dispositif de verrouillage.
Thickness of the locking device.
goupille ne repose pas toujours sur le fond du logement de rotule. La
3) On donne une valeur plus grande parce que, clans ce cas, la
position de la lisée est déterminée parla position H3 du centre du trou, par son diamètre D4 (voir article 15) et par
goupille norma
en contact
la dimension F2 (voir Publication 372 de la C E I) ; elle est aussi influencée par les extrémités des branches restant
correct pour les goupilles.
avec le logement de rotule. Les valeurs de H2 assurent un jeu
A greater value is given because in this case the split-pin does not always rest on the bottom of the socket. The position of the
st dard split-pin is determined by the position H3 of the centre of the hole and its diameter D4 (see Clause 15) and dimension F2
an
(see I E C Publication 372) and is also influenced by the tips of the legs resting in contact with the socket. The values of H 2 ensure
the correct clearances for split-pins.

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SIST HD 474 S1:1998
— 12 — 120 O C E I 1984
11. Dimensions du calibre d'accrochage « PASSE »
Dimensions of the hook-on "GO" gauge
D,
D,
D4
184177

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SIST HD 474 S1:1998
Désignation de
l'assemblage
H3 R, R2 R3 R4 R5 R5
Calibre - Gauge D, D2 D3 D4 H, H2
Designated size
of coupling
Contour max.
1,450 49,70
12,000 22,950 25,322 60,15 9,250 17,775 23,775 35,075 35,075 3,631 2,80
I)
Max. contour
Contour nominal
Neuf
22,920 25,348 59,95 9,220 17,860 23,860 35,060 35,060 3,616 1,460 49,80 2,70
11,980
New Nominal contour
11
Contour min .
22,890 25,374 59,75 9,190 17,945 23,945 35,045 35,045 3,601 1,470 49,90 2,60
I) 11,960
Min. contour
22,800 25,400 59,55 9,100 18,000 24,000 35,000 35,000 3,556 1,500 50,00 2,50
Usé 2) - Worn 2) 11,900
Contour max.
50,086 3,071 2,939 71,70 2,80
1) 17,122 33,490 35,326 90,59 13,572 20,686 31,786 23,086
Max. contour
Contour nominal
Neuf
50,068 3,055 2,952 71,80 2,70
17,096 33,450 35,351 90,39 13,536 20,768 31,868 23,068
New Nominal contour
16
Contour min. 2,965
I) 17,070 33,410 35,376 90,19 13,500 20,850 31,950 23,050 50,050 3,039 71,90 2,60
Min. contour
35,400 89,99 13,400 20,900 32,000 23,000 50,000 2,993 3,000 72,00 2,50
Usé 2) - Worn 2) 17,000 33,300
Contour max . 45,484 120,95 19,702 25,551 42,151 27,101 60,101 5,845 3,425 89,55 3,45
I) 21,150 41,220
Max. contour
Contour nominal
Neuf
21,120 41,170 45,523 120,65 19,656 25,678 42,278 27,078 60,078 5,824 3,440 89,70 3,30
New Nominal contour
.
20 Contour min 41,120 45,561 120,35 19,610 25,805 42,405 27,055 60,055 5,803 3,455 89,85 3,15
I) 21,090
Min. contour
45,600 120,05 19,500 25,900 42,500 27,000 60,000 5,753 3,500 90,00 3,00
Usé 2) - Worn 2) 21,000 41,000
ntourmax. Max. c
25,172 49,250 50,490 140,90 21,242 25,971 46,171 40,121 70,121 6,732 3,914 104,55 3,45
11
Max. contour
Neuf Contour nominal
25,136 140,60 21,186 26,093 46,293 40,093 70,093 6,706 3,932 104,70 3,30
49,190 50,527
New Nominal contour
Contour min . 24
25,100 49,130 50,564 140,30 21,130 26,215 46,415 40,065 70,065 6.680 3,950 104,85 3,15
I)
Min. contour
2) - Worn 2) 25,000 49,000 50,600 140,00 21,000 26,300 46,500 40,000 70,000 6,615 4,000 105,00 3,00
Usé
Contour max .
29,190 57,290 66,870 165,94 23,770 29,100 51,100 55,135 80,135 7,994 4,414 129,55 3,45
1)
Max. contour
Contour nominal
Neuf
29,150 57,215 66,915 165,64 23,708 29,250 51,250 55,104 80,104 7,967 4,432 129,70 3,30
New Nominal contour
28 Contour min.
t) 29,110 57,140 66,960 165,34 23,646 29,400 51,400 55,073 80,073 7,938 4,450 129,85 3,15
Min. contour
23,500 29,500 51,500 55,000 80,000 7,864 4,500 130,00 3,00
Usé 2) - Worn 2) 29,000 57,000 67,000 165,04
. Contour max
27,300 34,000 61,400 70,150 90,150 9,719 4,914 149,55 3,45
I) 33,220 65,310 85,800 198,45
Max. contour
Neuf Contour nominal
65,230 85,850 198,22 27,225 34,175 61,600 70,112 90,113 9,683 4,932 149,70 3,30
33,170
New Nominal contour
32
Contour min,
33,120 65,150 85,900 197,98 27,150 34,350 61,800 70,075 90,075 9,647 4,950 149,85 3,15
I)
Min. contour
Usé 2) - Worn 2) 33,000 65,000 86,000 197,83 27,000 34,500 62,000 70,000 90,000 9,572 5,000 150,00 3,00
1) Le contour du calibre neuf doit être compris entre les contou rs maximal et minimal.
rs .
The contour of the new gauge must fall between the maximum and minimum contou
2) Voir l'article Bl.
See Clause Bl.

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SIST HD 474 S1:1998
— 14 — 120 © CEI 1984
12. Dimensions des haltères
Dimensions of twin-balled pins
Désignation
de l'assemblage
h4
Designated size
of coupling
11 47_x,5
4
16 63_°,0
20 83_°,2
24 90_3,5
28
97_3,5
32
120_02,0
185/77
Pour les autres dimensions, voir l'article 9.
For other dimensions, see Clause 9.

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SIST HD 474 S1:1998
- 15 -
120 © I E C 1984
Jeu entre la tige à rotule et le logement de rotule
13.
Clearance between the pin ball and the socket end
D,
186/77
logement de rotule.
La tige à rotule se trouve à l'intérieur du
La tige à rotule se trouve dans l'entrée du logement de rotule.
The pin ball in the socket interior.
The pin ball in the socket entry.
Désignation
P 0
D2-d2
Di-di
i
de l'assemblage
D3-d2
Designated size
Min.
Min. Max. Min. Min. Max.
of coupling
1,7 1,4 3,9 1,6
11 0,6 3,0 1,7
5,0 1,2 1,2 1,1 4,0 1,6
16 A 2,2
2,2 5,0 1,2 1,2 3,6 6,5 3,7
16 B
1,5 1,5 1,0 4,5 2,0
20 2,0 5,4
2,5 6,4 2,0 2,0 2,5 6,7 2,8
24
2,5 7,2 3,0
3,0 7,4 2,0 2,0
28
2,5 2,5 3,0 8,2 3,5
32 3,0 7,9
Jeu entre la tige et le dispositif de verrouillage.
1 )
the locking device.
Clearance between the pin ball and

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SIST HD 474 S1:1998
— 16 — 120 © C E I 1984
de la tige à rotule
14. Efficacité du verrouillage
Effectiveness of locking the pin ball
188/77
hauteur minimale du dispositif de verrouillage
T =
minimum thickness of the locking device
efficacité du verrouillage
S
effectiveness of locking
Désignation
S
de l'assemblage
Designated size
Min.
of coupling
0,9
11
1,5
16 A
16 B 1,4
20 2,5
2,0
24
28 2,8
32 3,3

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SIST HD 474 S1:1998
120 0 I E C — 17 —
1984
15. Dimensions du logement de la goupille
trou de
Dimensions of the hole for the split-pin
IN Axe de l'assemblage
Axis of the coupling
Section YY
Section YY
230/84

EXEMPLE 2a EXEMPLE 2b
EXEMPLE 1

EXAMPLE 2a EXAMPLE 2b
EXAMPLE 1
Assemblages
DS K L
normalisés
D4 H3
Standard
Min. Max.
Min.
couplings
± ±
0,4 13,5 3,75+ô 3,5 0,6 24
11 7,5
±
± 4,75+ô 4 0,7 32
16A 9,5 0,5 16,0
±
± 18,0 5+ 5 1 32
16 B 10 0,5
ô
ô,2
± ±
10 0,5 18,0 5+ 5 1 40
20
6+ô'5
±
± 1
24 12 0,5 21,5 6 51
6,5+o,s
±
± 24,0 7 1,2 59
28 13 0,5
±
±
0,5 28,0 7,5+,1),5 8 1,4 68
32 15
sont valables pour les goupilles normalisées et les variantes de goupilles
Les dimensions
(voir Publication 372 de la C E I).
rnative split-pins (see I E C Publi-
The dimensions are applicable to both standard and alte
cation 372).

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SIST HD 474 S1:1998
120 © C E I 1984
— 18 —
trou pour le logement de l'agrafe
16. Dimensions du
Dimensions of the hole for the W-clip
`//////////// //i
Section YY
l'assemblage
Axe de
Axis of coupling
Section XX
231/84
Assemblages
B2
normalisés L
B 1 H3
Standard
Min. Max.
couplings
±
±
11 12,5 0,8 24 6,5 0,8 18
7 ± 0,8 24
16A 16 ± 1 33
± ±
33 9,5 0,8 24
16 B 16 1
±
±
17 1 34 8,5 0,8 29
20
±
± 10,5 0,8 34
24 17,5 1 34,5
± ±
1 39 11,5 0,8 42
28 20
±
± 48
22 1 42 13,0 0,8
32
la hauteur 1/3 doit être main-
longueur du logement pour laquelle
La dimension B 2 est la
tenue.
pas importante.
Au-delà de B2, la forme du logement n'est
3 shall be maintained.
is the length of the recess over which the height H
Dimension B2
2, the shape of the recess is not important.
Beyond B

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SIST HD 474 S1:1998
120 © I E C 1984 — 19 —
APPENDIX A
ANNEXE A
POSITION DE GLISSEMENT ET POSITION SLIDING POSITION AND OVER-TILTING
POSITION OF THE PIN BALL IN
DE BASCULEMENT DE LA TIGE
À ROTULE DANS LE LOGEMENT THE SOCKET END
DE ROTULE
A1. Position de tige à le logement de rotule
glissement de la rotule dans
Sliding position of the pin ball in the socket end
Désignation
a'
de l'assemblage
a° moyen
Designated size
average
of coupling
11 1,3
16 A 4,0
16 B 4,0
20 3,3
24
2,7
28 2,5
189177
32 2,0
A2. Posi
tion de basculement de la tige à rotule dans le logement de rotule
Over-tilting posi tion of the pin ball in the socket end
Désignation
f q
de l'assemblage
moyen
Designated size
average
of coupling
11 12,0
16 A 9,5
16 B 12,0
20 9,0
24 10,0
28 9,0
190/77 32 9,0
1) Les valeursf3 correspondent à des tolérances raisonnables
de H2.
J3 values assume reasonable tolerances for H2.

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SIST HD 474 S1:1998
120 © I E C 1984 — 21 —
APPENDIX B
RECOMMENDED GAUGES
B 1. Tolerance system
The tolerances for the gauges follow the ISO system. This means that the "NOT GO" gauges
only have manufacturing tolerances which are symmetrically located in relation to the corre-
. It also means that the "GO" gauges have allowances
sponding tolerance limit of the coupling pa rt
for wear and manufacturing tolerances which fall within the tolerance zone of the coupling
part.
ry to use the allowance for
...