Type tests for composite post insulator
To ensure the quality of the composite post insulator, Orient Power does the tests according to the test’s standards. The type tests for composite post insulator are very important.
The electrical type tests for composite post insulator shall be performed only once on insulators satisfying the conditions above and shall be performed with arcing or field control devices (which are generally necessary on composite insulators at transmission voltages) if they are an integral part of the insulator type. An insulator type is electrically defined by the arcing distance, creepage distance, shed inclination, shed diameter and shed spacing.
composite post insulator polymer post insulator
Damage limit proof test and test of the tightness of the interface between end fittings and insulator housing:
It is a part of the type tests for composite post high voltage insulator. Both ends of one of the four specimens shall, at the end of the 96 h test, be subjected crack indication by dye penetration, in accordance with ISO 3452, on the housing in the zone embracing the complete length of the interface between the housing and metal fitting and including an additional area, sufficiently extended, beyond the end of the metal part.
The indication shall be performed in the following way:
1. The surface shall be properly pre-cleaned with the cleaner;
2. The penetrant shall be applied on the cleaned surface and left to act for 20 min;
3. The surface shall be cleaned of the excess penetrant and dried;
4. The developer shall be applied, if necessary;
5. The surface shall be inspected.
Some housing materials may be penetrated by the penetrant. In such cases, evidence shall be provided to validate the interpretation of the results.
Except the composite post insulator, we also produce porcelain station post insulator C6-550, C10-550 and IEC porcelain station post insulator C6-750, C8-750, C10-750. As we are professional manufacturers, we have large quantities of knowledge about the insulators, and we also have the tests for porcelain station post insulator C6-550, C10-550 and IEC porcelain station post insulator C6-750, C8-750, C10-750, such as the sample tests for HV porcelain station post insulator and design tests for ceramic station post insulator.