In some insulator tender document, they will list insulator standards, such as 33kV pin type composite insulator can be produced in accordance with international standards.

                    IEC standard                               33kV pin type composite insulator

List some standards of 33kV pin type composite insulator
◆ IEC 60120: dimensions of ball and socket couplings of string insulator units
◆ IEC 60815: guide for the selection of insulators in respect of polluted conditions
◆ ISO 1461: Metallic coatings – hot dip galvanized coatings on fabricated ferrous products- requirements
◆ ISO 1460: Metallic coatings – hot dip galvanized coatings on fabricated ferrous products- metals – determination of mass per unit area – gravimetric method
◆ IEC 61109: composite insulators for AC overhead lines with normal voltage greater than 1000V- definition, test methods and acceptance criteria
◆ IEC 60383: Tests on insulators of ceramic materials or glass for overhead lines with normal voltage greater than 1000V

Some countries buy 33kV pin type composite insulator in accordance with national standards. Orient Power cam produced 33kV pin type composite insulator according to customers’ requirements.

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