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Results 1 - 10 of 10
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Concerns about the present derating factors used for reeled trailing cables prompted researchers at the NIOSH to determine new derating factors for reeled coal mining trailing cables.
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9/1/2006 - Peer reviewed journal articlesThere are potential detrimental effects of capacitance charging currents during line-to-ground faults in mine power distribution systems. A representative mine power system is modeled, and simulations with faults at various locations are conducted.
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8/23/2016 - Contracts and cooperative agreementsA contract to develop technology that is broadly applicable to mobile and battery-driven equipment in hazardous environments.
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7/19/2016 - Contracts and cooperative agreementsA contract to develop new technologies for emergency de-energizing of batteries, and to demonstrate prototype systems designed for application in a battery system currently employed in mining operations.
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7/1/2002 - Conference papersThis paper summarizes the results obtained from a field-scale test and shows that mapping voids within a coal pile is possible.
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5/1/2001 - Peer reviewed journal articlesOverhead electric power lines present a serious electrocution hazard to personnel in a variety of industries. There is a practical low-cost concept to detect actual contact of mobile equipment with a high-voltage line and provide a warning.
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10/1/1999 - Conference papersPresented in this paper is a theoretical review of the relationships that should exist between electrical winding parameters and the mechanical vibration of a-c machine elements under normal and faulted operating conditions.
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5/1/1999 - Peer reviewed journal articlesThis paper analyzes the impact of more accurate transformer models on voltages and fault currents which are realized from loadflow and fault studies of mine power systems.
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9/1/1974 - Contract reportsTwo different techniques were used to make measurements of the absolute value of electromagnetic noise in an operating hardrock mine, Grace Mine, located near Morgantown, Pennsylvania.
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1/1/1984 - Reports of InvestigationsElectromagnetic narrow-band signals were transmitted through the earth at 27 coal mines located throughout the United States. From those tests, apparent earth conductivity values were derived based upon a homogeneous half-space model of the earth.
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Content source: National Institute for Occupational Safety and Health, Mining Program