AS IEC 62217:2021 pdf free.Polymeric HV insulators for indoor and outdoor use一General definitions, test methods and acceptance criteria.
7.2 Type tests
The type tests are intended to verify the main characteristics of a polymeric insulator, which depend mainly on its shape and size. Type tests shall be applied to polymeric insulators belonging to an already qualified design class. The type tests shall be repeated only when the type of the polymeric insulator is changed. The parameters defining a type of polymeric insulator are given in the relevant product standard.
The applicable type tests are given in the relevant product standard.
7.3 Sample tests
The sample tests are intended to verify the characteristics of polymeric insulators which depend on the quality of manufacture and on the materials used. They are made on insulators taken at random from lots offered for acceptance.
The applicable sample tests are given in the relevant product standard.
7.4 Routine tests
These tests are intended to eliminate polymeric insulators with manufacturing defects. They are carried out on every insulator to be supplied.
The applicable routine tests are given in the relevant product standard.
8 General requirements for insulator test specimens
Insulator test specimens for tests of polymeric insulators shall be checked prior to tests:
• for correct assembly, for example by applying the mechanical routine test specified in the relevant product standard,
• by visual examination according to the relevant product standard;
• for conformance of dimensions with the actual drawing.
The measurement of creepage distances shall be related to the design dimensions and tolerances as determined from the insulator drawing, even if this dimension is greater than the value originally specified. When a minimum creepage is specified, the negative tolerance is also limited by this value.
In the case of insulators with creepage distance exceeding 3 m, it is allowed to measure a short section around I m long of the insulator and to extrapolate.
The housing colour of the test specimens shall be approximately as specified in the drawing.
The number of test specimens, their selection and dimensions are specified in the relevant clauses of this standard or in the relevant test standards.AS IEC 62217 pdf download.