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Mining Publication: Detection of Downed Trolley Lines Using Arc Signature Analysis
Keywords: Data analysis Electrical arcs Fire and explosion prevention Fires Trolley wire
Original creation date: May 1997
Authors: JS Peterson, GP Cole
Report of Investigations - May 1997
Download PDF Document (2.26 MB)
NIOSHTIC2 Number: 00238991
Pittsburgh, PA: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, NIOSH, DHHS (NIOSH) Publication No. 97-123, Report of Investigations 9639 1997 May :1-13
A cost effective and practical system for monitoring hauling system electrical current patterns was developed. The aim was to reduce the hazards associated with electrical fault currents from fallen coal mining trolley hauling system lines. The current could result in local heating or arcing and thus increase the risk of a fire. Computerized electrical current analysis techniques were tested at several Pennsylvania coal mining sites on mining trolley hauling systems using a range of currents. Current readings were taken during all phases of the loading process, under normal (light, intermediate and heavy traffic) and during simulated arcing and bolted fault conditions. Voltage data collected from these trials were used to develop a microprocessor based fault detection algorithm, which field tests showed was 95% accurate. The frequency of the rectifier current and the imposed fault signal were used to detect arcing faults. The authors conclude that this improves the detection and extinguishing of self sustaining arcs thus minimizing fire risk.
Image of publication Detection of Downed Trolley Lines Using Arc Signature AnalysisReport of Investigations - May 1997
Download PDF Document (2.26 MB)
NIOSHTIC2 Number: 00238991
Pittsburgh, PA: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, NIOSH, DHHS (NIOSH) Publication No. 97-123, Report of Investigations 9639 1997 May :1-13
See Also
Analysis of Mine Fires for All U.S. Metal/Nonmetal Mining Categories, 1990-2001
Analysis of Mine Fires for All U.S. Underground and Surface Coal Mining Categories: 1990-1999
Determining the Root Causes of Flame Cutting and Welding Fires in Underground U.S. Coal Mines
Effectiveness of Various Concentrations of an Inert Gas Mixture for Preventing and Suppressing Mining Equipment Cab Fires: Development of a Dual-Cab Fire Inerting System
Ignition of Hydraulic Fluid Sprays by Open Flames and Hot Surfaces
Innovative Strategies for Mine Fire Preparedness
Performance-Based Fire Safety Designs for Self-Escape in Underground Mines
Structural Analysis and Design of Seals for Coal Mine Safety
Technology News 456 - A Fault Detection Neural Network for DC Trolley System Protection
An Underground Coal Mine Fire Preparedness and Response Checklist: The Instrument
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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