A new approach to inspect the internal pressure of vacuum switchgear |
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| Authors: | Li-wen Luo Zi-yu Zhao Hai-yu Li |
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| Affiliation: | (1) Department of Electrical Engineering, Shanghai Jiaotong University, Shanghai, 200240, China;(2) School of Electrical & Electronic Engineering, the University of Manchester, Manchester, UK |
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| Abstract: | A new approach is developed to inspect the internal pressure within the vacuum switchgear by no means of magnet-exciting coil, micro-discharge threshold voltage Ud and field emission threshold voltage Ue, all of which are available in laboratory. Experimental results show that internal pressure is a function of the ratio of the micro-discharge threshold voltage to the field emission threshold voltage i.e., Ud/Ue. By this method, the internal pressure in the range of 100-10-4 Pa within vacuum chambers can be inspected without magnet-exciting coil which is required in conventional magnetron discharge method. |
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| Keywords: | vacuum switchgear internal pressure micro-discharge field emission |
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