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Mine Power Distribution. Proceedings: Bureau of Mines Technology Transfer Seminar, Pittsburgh, Pennsylvania, March 19, 1975.

Anonymous

NTIS: PB 250 748 :114 pages

10008067

The papers contained herein summarize results of various recent Bureau of Mines investigations in the area of mine power distribution systems. They are based on information from Bureau personnel, contractors and grantees, and the Mining Enforcement and Safety Administration. Conclusions drawn from a series of parameter measurements on mine power systems, taken over a 3-year span, are presented. Personnel and equipment hazards due to faults on isolated, solidly grounded, and resistance grounded three-phase systems are discussed. Two papers cover DC applications of circuit breakers, including a novel protection scheme for trolley lines. The methods of suppressing induced arcing currents and voltages in a- c machines are evaluated. An evaluation program for ground monitors is described. Acceptance test procedures and the importance of various parameters for trailing cable splices are covered. A number of techniques for locating faults in trailing cables are described.

19750101

IH; Information Circular;

1975

PB-250748

A07

IC 8694

PRC;

NTIS: PB 250 748

PA;