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Mining Publication: A Passive Means to Detect Hot Trolley Insulators
Keywords: Electrical insulation Temperature sensors Thermal detection Trolley wire
Original creation date: January 2000
Authors: MR Yenchek, AJ Hudson
Peer Reviewed Journal Article - January 2000
Download PDF Document (0.31 MB)
NIOSHTIC2 Number: 20020868
Min Eng 2000 Jan; 52(1):43-47
Faulty insulators on mine trolley/track haulageways may allow leakage of currents into the mine roof, which may ultimately result in the combustion of the roof material. The National Institute for Occupational Safety and Health (NIOSH), Pittsburgh Research Laboratory (PRL), devised a passive means to detect overheating insulators on direct current systems. The detector consists of spring-loaded cartridge that ejects a reflective streamer of white Teflon tape when subjected to elevated temperatures. The cartridge assembly can easily be installed over the outer metallic shell of an existing trolley line insulator. If an insulator overheats due to ground leakage currents, the visible streamer alerts mine personnel traveling on the haulageway.
Image of publication A Passive Means to Detect Hot Trolley InsulatorsPeer Reviewed Journal Article - January 2000
Download PDF Document (0.31 MB)
NIOSHTIC2 Number: 20020868
Min Eng 2000 Jan; 52(1):43-47
See Also
Derating Factors for Round and Flat Mine Trailing Cables
Detection of Downed Trolley Lines Using Arc Signature Analysis
Distributed Measurement of Conductor Temperatures in Mine Trailing Cables Using Fiber-Optic Technology
Electrical Fault Detection on Downed DC Trolley Lines
Motor Monitoring System for a Continuous Miner
Overview of Mine Fire Detection
Technology News 456 - A Fault Detection Neural Network for DC Trolley System Protection
Technology News 474 - A Passive Means to Detect Hot Trolley Insulators
Use of Infrared Sensors for Monitoring Methane in Underground Mines
Wireless Sensor Network with Methane Gas Cloud Detector and Absolute Pressure Sensor
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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