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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

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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.

Item type: Article
ID code: 3577
Keywords: condition monitoring, digital monitoring, high voltage circuit breakers, impulsive noise, radiometric monitoring, switching times, Electrical engineering. Electronics Nuclear engineering
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 12 Jun 2007
    Last modified: 06 Dec 2013 17:01
    URI: http://strathprints.strath.ac.uk/id/eprint/3577

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