Abstract
A survey is given of available data on the sparkover of air under various geometrical electrode arrangements. As positive switching impulses have been found to be the more severe stresses for external insulation, only the positive polarity is dealt with in detail; however, some data concerning the negative polarity in particular gap configurations have been included together with data for alternating voltages. Parameters affecting the dielectric strength of air insulation, such as gap geometry and spacing, radius of the conductor and the presence of surface protrusions, waveshape, voltage polarity and the effects of humidity and density, are surveyed. Finally, minimum clearances and gap factors for various electrode arrangements encountered in practice have been determined and compared with a recent IEC assessment method based upon data using the reference rod-plane airgap.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IEE Proceedings - Science, Measurement and Technology
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
