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EVS-HD 474 S1:2003

Dimensions of ball and socket couplings of string insulator units

General information
Withdrawn from 15.10.2020
Base Documents
IEC 60120:1984; HD 474 S1:1986
Directives or regulations
None
Standard history
Status
Date
Type
Name
15.10.2020
Main
01.02.2003
Main
Applies to string insulator units of the cap and pin and long rod types and their associated metal fittings for overhead lines. Includes six standard sizes designated by the nominal pin diameters which form the basis of the standard. Defines each standard size by the dimensions of the pin ball, of the socket and the hook-on 'Go' gauge. States dimensions of twin-balled pins for coupling of two sockets. Tabulates clearance and locking conditions. Appendices give information on extreme positions of the pin ball in the socket as well as on gauges for checking dimensions.
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