Insulator historical development

Insulator historical development is not a long time. The application of power time is not long. But the application of the insulator is rapid development. Now the insulator has been used in many places.


The first polymers used for electrical insulators were bisphenol and cycloaliphatic epoxy resins.
Introduced commercially in the mid1940s, bisphenol epoxy resins were the first polymers used for electrical insulators, and are still used to make electrical insulators for indoor and outdoor applications. Cyloaliphatic epoxys (CE) were introduced in 1957. They are superior to bisphenol because of their greater resistance to carbon formation. However, the first commercial CE insulators failed shortly after installation in outdoor environments. Since then, new CE formations have resulted in improved electrical performance.
In the early 1960s, distribution class (CE) insulators were first sold commercially in the U.S. under the name GEPOL. These units failed due to surface damage and puncture. CE was used later in experimental 500 kV station breaker bushings, and in 115 kV bushings in the 1970s, and for suspension insulators by Transmission Development Limited (TDL) of England. The TDL suspension insulators used slant sheds to provide natural washing of contamination.

Now, the development of science and technology becomes faster and faster. Insulator historical development’s development pace is becoming more and more quickly, too.

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