Picture of a black hole

Strathclyde Open Access research that creates ripples...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of research papers by University of Strathclyde researchers, including by Strathclyde physicists involved in observing gravitational waves and black hole mergers as part of the Laser Interferometer Gravitational-Wave Observatory (LIGO) - but also other internationally significant research from the Department of Physics. Discover why Strathclyde's physics research is making ripples...

Strathprints also exposes world leading research from the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

Discover more...

Radiometric measurement of circuit breaker interpole switching times

Moore, P.J. (2004) Radiometric measurement of circuit breaker interpole switching times. IEEE Transactions on Power Delivery, 19 (3). pp. 987-992. ISSN 0885-8977

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

Monitoring the switching times of circuit breakers is important in the condition assessment of the operating mechanism. Although methods exist for this, they are not applicable to existing plant without retrofitting. Recent research shows that arcing produces impulsive radio-frequency radiation. Using direct digital sampling of the antenna signals, impulses from operating circuit breakers (CBs) may be recorded. From timing analysis of the received impulses, the interpole switching time of the CB can be measured. Results of this method are shown for a field trial on a 132-kV SF6 CB attached to a capacitor bank. The relationship between the opening and closing impulses is discussed. This method of timing measurement can be applied to an energized CB. Measurement of the interpole switching times is completely noninvasive, whereas the overall switching time requires a clamp CT fitted on the CB wiring.