AS IEC 62217-2021 Polymeric HV insulators for indoor and outdoor use — General definitions, test methods and acceptance criteria.
4 Identification
The manufacturer’s drawing shall show the relevant dimensions and information necessary for identifying and testing the insulator in accordance with this International Standard and the applicable IEC product standard(s). The drawing shall also show applicable manufacturing tolerances.
Each insulator shall be marked with the name or trademark of the manufacturer and the year of manufacture. In addition, each insulator shall be marked with the rated characteristics specified in the relevant IEC product standards. These markings shall be legible, indelible and their fixings (if any) weather- and corrosion-proof.
5 Environmental conditions
The normal environmental conditions to which insulators are submitted in service are defined according to Table 1 .
When special environmental conditions prevail at the location where insulators are to be put in service, they shall be specified by the user by reference to IEC 60721 -1 .
6 Information on transport, storage and installation
Manufacturers of insulators shall provide appropriate instructions and information covering general conditions during transport, storage and installation of the insulators. These instructions can include recommendations for cleaning or maintenance.
7 Classification of tests
The tests are divided into four groups as follows:
7.1 Design tests
The design tests are intended to verify the suitability of the design, materials and method of manufacture (technology).
A polymeric insulator design is generally defined by:
– materials of the core, housing and manufacturing method;
– material of the end fittings, their design, and method of attachment;
– layer thickness of the housing over the core (including a sheath where used).
Additional parameters defining design may be given in the relevant product standard.
When changes in the design of a polymeric insulator occur, re-qualification shall be
carried out according to the prescriptions of the relevant product standard. Typically, only part of the tests is repeated. A survey of the tests is given in Annex C.
When a polymeric insulator is submitted to the design tests, it becomes a parent insulator for a design class and the results shall be considered valid for the whole class. This tested parent insulator defines a design class of insulators which have the following characteristics:
a) same materials for the core and housing and same manufacturing method;
b) same material of the end fittings, the same design and the same method of attachment;
c) same or greater minimum layer thickness of the housing over the core (including a sheath where used).
Additional parameters defining a class of design may be given in the relevant product standard.AS IEC 62217 pdf download.