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Title: Predictive maintenance of vacuum switchgear
Authors: Su, S
Zeng, X
Li, KK
Chan, WL 
Li, W
Keywords: Discharges (electric)
Electric current measurement
Electric field measurement
Maintenance engineering
Short-circuit currents
Vacuum arcs
Vacuum interrupters
Issue Date: 2004
Publisher: IEEE
Source: Conference record of the 2004 IEEE Industry Applications Conference : Converting theory to practice : 39th IAS Annual Meeting : 3-7 October, 2004, Seattle, v. 3, p. 1737-1740 How to cite?
Abstract: The vacuum switchgear interrupts short circuit current with vacuum interrupter. The internal pressure of vacuum interrupter, which can only be measured in an undetached approach, is the key to the arc interrupting capability of vacuum switchgear. An electric field measurement based approach is developed in this paper. This approach and the magnetron discharge current measurement based approach are employed in combination to detect the internal pressure of the vacuum switchgear to facilitate the predict replacement of the vacuum interrupter of the switchgear. The magnetron discharge based approach is employed to calibrate the internal pressure within vacuum interrupter accurately offline and the electric field measurement based approach is employed to detect the deterioration trends online. The apparatus developed followed by the electric field measurement approach has been applied on three power utilities for about three years and the measured data with aforementioned two approaches are provided in this paper.
ISBN: 0-7803-8486-5
ISSN: 0197-2618
DOI: 10.1109/IAS.2004.1348705
Appears in Collections:Conference Paper

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