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ABB post insulators

ABB post insulators made of wet-process porcelain and used in the transmission and distribution of electrical energy, also called outdoor high-voltage post-type apparatus insulators.

ABB post insulators

ABB post insulators shall refer to a unit or to a stack of two or more units. The technical reference numbers appearing are widely used and recognized identification series for apparatus insulator units and stacks.

Some ABB post insulators are tapered and may contain units that have certain characteristics whose strengths exceed those given in the standards. Each unit shall comply with the manufacturer’s strength requirements.

Low frequency wet withstand test is one main of design tests. Three post insulators shall be selected at random and tested in accordance with 4.5 of ANSI C29.1-1982. Failure of any insulator to meet the rated wet withstand value, as given in the applicable table, shall constitute failure to meet the requirement of ANSI C29.9-1983.

Minimum dimensions are limited by other specified characteristics. Each post insulator unit shall bear symbols identifying the manufacturer and giving the year of manufacture. The marking shall be legible and durable.

 

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