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Post insulator cantilever strength is one main of electrical parameters and should be tested in accordance with insulator specifications and customer’s requirements.

According to insulator design, insulator cantilever strength has
◆ Ultimate mechanical strength
◆ Combined mechanical and electrical strength
◆ Time-load withstand strength
◆ Mechanical-impact strength

Post insulator cantilever strength is one of mechanical strength and designed in accordance with ANSI or client’s requirements.

We should do Post insulator cantilever strength tests, how to do this tests?
Three insulators shall be selected at random and tested in accordance with 5.1.4.1 ANSI C29.1-1982. For multiunit insulators, three of each type of unit in the stack shall be rested.

The units may be tested in a stack or individually. Failure of the average strength of three insulators or units to meet the strength requirements given in the tables or to meet the specified higher strength requirement, where applicable, or failure of any one insulator or unit to equal 85 percent of that strength requirement shall constitute failure to meet the requirements of ANSI C29.9 standard.

You can learn the Post insulator cantilever strength test in this article, you can learn more according to ANSI or IEC specifications.

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