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송재용(J. Y. Song),길경석(G. S. Kil),신광철(G. C. Shin),박종국(J. K. Park),심재원(J. W. Sim) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
In this study, a ubiquitous sensor for condition monitoring of insulators and lightning arresters installed in power distribution lines and electric traction vehicles is presented. The sensor consists of two parts; a leakage current measurement and a lightning surge detection. Measured data are transmitted to a supervisory computer through ZigBee protocol based on IEEE 802.15.4. To detect leakage current, a window type Mn-ZCT is used and a low-noise amplifier with a gain of 60 ㏈ is designed, and this can measure leakage current in ranges of 100 ㎂ ~ 5 ㎃. A sample-hold (S/H) and a Rogowski coil are injected to analyze the magnitude of surge current in ranges from 500 A to 10 ㎄ with 8/20 ㎲-waveform.