Nanosecond Response of a ZnO Element in a Coaxial Line

Rosado, J., German, D. M. and Waters, Ronald 1998. Nanosecond Response of a ZnO Element in a Coaxial Line. Measurement Science and Technology 9 (9) , pp. 1620-1625. 10.1088/0957-0233/9/9/035

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Abstract

ZnO surge arresters have become widely used for overvoltage protection in high-voltage power systems. In order to examine response in the nanosecond regime, a toroidal element from a practical arrester has been incorporated into a coaxial line and subjected to transient voltages of 5 ns risetime and 8.8 kV prospective peak. It is shown that the current in the element may be deduced from terminal voltage measurements without use of a current transducer. For the test voltages used, the element showed a high-permittivity capacitive response with no measurable relaxation time or significant voltage nonlinearity; the non-uniform electric field distribution in the element in the pre-conduction phase thus remains undistorted. Such coaxial configurations could have practical applications in power supply, communications or data systems

Item Type:	Article
Status:	Published
Schools:	Engineering
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Publisher:	IOP Publishing
ISSN:	09570233
Last Modified:	24 Nov 2017 14:59
URI:	https://orca.cardiff.ac.uk/id/eprint/107049

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