Mining Publication: A Passive Means to Detect Hot Trolley Insulators
ShareCompartir
Original creation date: January 2000
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.
Authors: MR Yenchek, AJ Hudson
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 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
- Content source: National Institute for Occupational Safety and Health, Mining Program