Development of a DC Current Limiting and Interrupting System for Mines

Details

• Personal Author:
  Hamilton HB ; Yenchek, Michael R.
• Description:
  A switching system for high-fault-current 300- and 600-Vdc mine power systems is presented. The system consists of paralleled main and auxiliary contactor circuits with a liquid metal current limiting device (CLD) in series with the auxiliary contactor. Upon detection of a fault, the current is commutated into the CLD circuit. The liquid metal vaporizes, increasing the CLD resistance and considerably decreasing the actual current to be interrupted. This system materially reduces the wear and tear on contactors because of the reduced interrupting requirement. The CLD is pressurized; when the current is interrupted, liquid metal flows back into the bore. Thus, it is self-resetting. Basic design principles, materials used, and test results are presented. [Description provided by NIOSH]
• Subjects:
  Coal Dust Mining Occupational Health Safety
• Keywords:
  Electrical-transmission Electronic-components Electronic-devices Electronic-equipment Mining-equipment Mining-industry Underground-mining
• Series:
  Mining Publications
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  OSHA Region 3 ; Pennsylvania ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PRC - Pittsburgh Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  64-79
• NIOSHTIC Number:
  nn:20033473
• Citation:
  Proceedings of the Sixth WVU Conference on Coal Mine Electrotechnology, Morgantown, West Virginia, July 28-30, 1982. Cooley WL, ed., Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract J0123017, 1982 Nov; :64-79
• Editor(s):
  Cooley WL
• Federal Fiscal Year:
  1983
• Peer Reviewed:
  False
• Source Full Name:
  Proceedings of the Sixth WVU Conference on Coal Mine Electrotechnology, Morgantown, West Virginia, on July 28-30, 1982.
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:0893def88de23b0bc3672c3d41dca6d79c5e1781a846d28c202fd2f74fe30cfd777c888efb9a4fef6bde641a54b183c925d536f1dc86b5d5b3ca4bcb11c535fd
• Download URL:
  https://stacks.cdc.gov/view/cdc/226923/cdc_226923_DS1.pdf
• File Type:
  [PDF - 2.02 MB ]