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Passive means to detect hot trolley insulators.

Authors
Yenchek-M; Hudson-A
Source
Min Eng 2000 Jan; 52(1):43-47
NIOSHTIC No.
20020868
Abstract
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.
Keywords
Fire-prevention; Insulation-materials; Detectors; Mining-equipment; Mining-industry; Combustibility; Combustible-materials
Contact
NIOSH, Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236
CODEN
MIENAB
Publication Date
20000101
Document Type
Journal Article
Fiscal Year
2000
NTIS Accession No.
NTIS Price
Issue of Publication
1
ISSN
0026-5187
NIOSH Division
PRL
Source Name
Mining Engineering
State
PA
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