New insight into the detection of high-impedance arcing faults on DC trolley systems.
IEEE Trans Ind Appl 1999 Sep/Oct; 35(5):1169-1173
High-impedance arcing faults are difficult to detect with conventional switchgear, and the presence of these faults in coal mine power systems represents a significant fire hazard. Research was performed to identify plausible techniques that would discriminate between the high-impedance arcing faults and legitimate load currents on the dc trolley system. This paper briefly summarizes that effort and focuses on the frequency characteristics of the arc current. After the arc was modeled as a stochastic process, good agreement was obtained between experimental observations and mathematical predictions.
Mine-fires; Electrical-hazards; Coal-mining; Electrical-resistance; Power-generation
Control Technology & Personal Protective Equipment; Other Occupational Concerns
IEEE Transactions on Industrial Applications