Title :
Fail-safe earth-fault-detection device for battery supplies
Author :
Virr, L.E. ; Pearson, F.K.
Author_Institution :
UK Safety in Mines Research Establishment, Department of Energy, Buxton, UK
fDate :
8/1/1974 12:00:00 AM
Abstract :
An electronic method for detecting an earth fault on a fully insulated battery system that fails to safety in the event of supply, component or connection failure, is described. The particular application to battery-driven coal-mine locomotives is discussed, and a device recently built and tested by the authors for this purpose is described in detail. The device is such that intrinsic safety for methane-air mixtures may be achieved, if desired, with flameproof enclosure of a minimal number of components, and in normal operation even a zeroresistance fault to earth on the battery, to which it is connected, cannot cause ignition of hydrogen-oxygen gas mixtures.
Keywords :
earthing; electric locomotives; fault location; power supplies to apparatus; safety; secondary cells; H2/O2 gas mixtures; battery supplies; coal mine locomotives; component failure; connection failure; earth fault detection device; electronic method; fail safe systems; flameproof; fully insulated battery system; intrinsic safety; methane air mixtures; supply failure; zero resistance fault;
Journal_Title :
Electrical Engineers, Proceedings of the Institution of
DOI :
10.1049/piee.1974.0190
