BS EN 61466-1:1997 Composite string insulator units for overhead lines with a nominal voltage greater than 1 000 V. Standard strength classes and end fittings
This part of IEC 61466 is applicable to composite
string insulator units for a.c. overhead lines with a
nominal voltage greater than 1 000 V and a
frequency not greater than 100 Hz.
It also applies to insulators of similar design used in
substations or on electric traction lines.
This standard applies to string insulator units of
composite type with ball, socket, tongue, clevis,
Y-clevis or eye couplings, or a combination thereof.
The object of this standard is to prescribe specified
values for the mechanical characteristics of the
composite string insulator units and define the
main dimensions of the couplings to be used on the
composite string insulator units in order to permit
the assembly of insulators or fittings supplied by
different manufacturers and to allow, whenever
practical, interchangeability with existing
installations.
It also defines a standard designation system for
composite string insulator units.
NOTE 1 General definitions and methods of testing are given in
IEC 1109.
NOTE 2 Only the dimensions necessary for assembly of the
couplings are dealt with in this International Standard.
Properties of material and working loads are not specified. The
co-ordination of dimensions of the end-fittings with the strength
classes is specified in Clause 7.
BS EN 61466-1:1997 history
2016BS EN 61466-1:2016 Composite string insulator units for overhead lines with a nominal voltage greater than 1000 V. Standard strength classes and end fittings
1997BS EN 61466-1:1997 Composite string insulator units for overhead lines with a nominal voltage greater than 1 000 V. Standard strength classes and end fittings