Overhead line porcelain insulators performance and testing is important, means that insulator test can inspect the Overhead line porcelain insulators performance whether qualified or not.
The schedule of tests and requirements for testing shall be in accordance with the requirements of Tables 1 to 3 inclusive of AS 2947.1.
The insulators offered shall be type tested in accordance with the requirements of AS 2947.1, AS 3608 or AS 3609 as applicable.
Type test certificates are to be submitted with the offer.
Testing shall have been undertaken at a NATA registered testing authority and must have been carried within the last ten (10) years. The following insulators are exempt from this requirement:
Low voltage (LP.LV, SH.LV.2) & Strain (GY type)
Note: Should suppliers be unable to provide a type test certificate from a NATA registered testing authority, then evidence must be provided that the testing authority is:
Independent of the manufacturer; and
Nationally accredited to carry out the relevant tests.
The materials used for the manufacture of the W-clips for ball and socket insulators shall be subjected to the qualification tests in accordance AS 60372.
All insulators shall be sample tested in accordance with the requirements of AS 2947.1, AS 3608 or AS 3609 as applicable.
“W” clips supplied with ball and socket insulators shall be sample tested in accordance with AS 60372.
Sample testing shall be undertaken by a NATA registered testing authority.
All sample test certificates shall state the lower confidence limit of the results (mean minus three  standard deviations) and this shall be greater than the specified minimum value.
Sample test certificates shall be supplied with each delivery of insulators (i.e. not by separate mail) and the lot numbers shall be marked on the sample test certificate and the packaging of the lot delivered.
Routine tests shall be carried out in accordance with the requirements of AS 2947.1, AS3608 or AS 3609 as applicable.
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