By Topic

On the measurement of the dielectric strength of silicone elastomers

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Hans-Jörg Winter ; Wacker Chemie AG, Germany ; Jens Lambrecht ; Roland Bärsch

Critical reading of IEC 60243-1 shows that the standard does not give recommendations for the measurement of the dielectric strength of elastomeric materials (e.g. of silicone rubber). Specific recommendations for molded materials are provided in chapter 4.1.6 of the standard for thermosets and thermoplastics only. In the absence of specific recommendations for elastomeric materials often the procedure according to chapter 4.1.6 is used for elastomers as well. The specific electrical strength of 1 mm-plate shaped silicone elastomer specimens is measured to be 20 ... 40 kV/mm depending on the electrode arrangement. It is found that even major material modifications (extenders, degree of crosslinking etc.) do not lead to substantial changes of the specific electrical strength. Thus, the suitability of the method for silicone elastomers is limited. In contrary, the specific electrical strength of silicone elastomers was found to be higher than 100 kV/mm if measured with cast-in electrodes. Selected parameters were found to have a distinct influence in the specific dielectric strength. Since the application of embedded specimens requires high preparative effort for some elastomers the use of cast-in plate shaped specimens is desirable. Comprehensive investigation shows that a suitable electrode arrangement in combination with a suitable embedding material results in a specific electrical strength in the range of that of specimens with cast-in electrodes and allows a better investigation of material modifications. The findings will be part of the ongoing revision work of IEC 60243-1.

Published in:

Universities Power Engineering Conference (UPEC), 2010 45th International

Date of Conference:

Aug. 31 2010-Sept. 3 2010