Sensitive Ground-Fault Protection for Mines. Phase I. Alternating- Current Utilization

Details

• Personal Author:
  Morley LA ; Novak T ; Trutt, Frederick C.
• Description:
  This report covers research and development of ground-fault relays for use on low-voltage alternating-current utilization circuits in mining. Sensitive relaying employs very low pickup levels such that, when used in conjunction with very high resistance grounding, the exposure of a human to ventricular fibrillation is significantly reduced. To delineate the desired relay characteristics, the report reviews and updates previous research in this area. The critical relay component for sensitive ground-fault relays has been found to be the current transformer. Electronics for two prototype relays-- an analog relay and a digital relay--have been produced through the research, and information is presented so that either may be duplicated. [Description provided by NIOSH]
• Subjects:
  Occupational Health Safety
• Series:
  Mining Publications
• Subseries:
  Open File Report
• Document Type:
  Text
• Genre:
  Conference Publications ; Final Contract Report
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PRC - Pittsburgh Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-90
• NIOSHTIC Number:
  nn:10004471
• NTIS Accession Number:
  PB85-185767
• Citation:
  NTIS: PB/85-185767 :90 pages
• Federal Fiscal Year:
  1984
• Performing Organization:
  Penn State Univ.
• Peer Reviewed:
  False
• Source Full Name:
  NTIS: PB/85-185767
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:80b97e2af0cd08335ee1deb151052b0a94b520df5b169afab08be3018ba471933ac4eaec30da8b01d7e18286e94bad7912ee5a07e065975965591e1a847a96bf
• Download URL:
  https://stacks.cdc.gov/view/cdc/235348/cdc_235348_DS1.pdf
• File Type:
  [PDF - 3.51 MB ]