Through phase-angle measurements [induction motor starting safety].
Yenchek-MR; Cawley-JC; Brautigam-AL; Peterson-JS
IAS '00: Conference Record of the 2000 IEEE Industry Applications Conference: Thirty fifth IAS Annual Meeting, October 8-12, 2000, Rome, Italy. Piscataway, NJ: Institute of Electrical and Electronics Engineers, 2000 Oct; 4:2695-2702
The National Institute for Occupational Safety and Health investigated how the starting of induction motors may cause nuisance tripping of short-circuit protection on coal mine power systems. This research had a dual purpose: 1) to identify how motor-start waveforms differ from those for short circuits and 2) to devise a method to provide short-circuit protection without intentional time delays to account for motor starts. This technology will help ensure that surface temperatures of energized electrical apparatus will not exceed gas or dust ignition thresholds when short circuits occur.
Coal-mining; Mining-industry; Electrical-safety; Electrical-hazards; Underground-mining; Mining-equipment; Electrical-equipment; Electrical-properties; Electronic-circuits; Voltage-regulation;
National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236-0070
IAS '00: Conference Record of the 2000 IEEE Industry Applications Conference: Thirty fifth IAS Annual Meeting, October 8-12, 2000, Rome, Italy