Porcelain suspension insulators are used on overhead power transmission lines and has been tested by buzz method which simply consisting in applying a short-circuit to each insulator in a string and listening for a buzz-like sound indicating a good insulator.

Most of time, we should inspect Porcelain suspension insulators, such as
◆ new life line tester for Porcelain suspension insulators on high voltage power lines
◆ cement grown failure of Porcelain suspension insulators
◆ effect arcing on DC flashover performance of contaminated Porcelain suspension insulators for various suspension patterns at high altitudes
◆ microstructure based evaluation of field aged and new Porcelain suspension insulators
◆ cement growth failure mechanism in Porcelain suspension insulators
◆ mechanical characteristics of Porcelain suspension insulators for tension strings on HVDC transmission lines
◆ calculation of voltage distribution along Porcelain suspension insulators based on finite element method
◆ Effect of conductor high –temperature on Porcelain suspension insulators etc.

Leakage distance or creepage distance is an important technical data for Porcelain suspension insulators similarly to other porcelain insulators.

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