An Approach to Diagnose Pressure Hazard of Vacuum Bulbs
Vacuum bulbs may encounter tbe pressure rise hazard that results in failure in interrupting over currents in power systems. The pressure may unexpectedly increase due to a slow leak through cracks after a long period of operation in the power system. Several methods for monitoring the pressure onsite have been proposed so far, but most of them are poor in the ability to checkup the hazardous pressure level of 1 Pa or less. The present paper reports the results of a primitive attempt conducted for diagnostic purposes. In the study, by monitoring the electrification on the insulator surface of a real vacuum bulb, we successfully provide a method to detect the pressure rise around 10-1 Pa.
Osamu Yamamoto Hiroki Naruse Hiroshi Morii
Department of Electrical Engineering, Kyoto University, Kyoto, Japan Power Engineering R&D Center, Kansai Electric Power Co Inc., Amagasaki, Hyogo, Japan
国际会议
西安
英文
249-252
2011-10-23（万方平台首次上网日期，不代表论文的发表时间）