Ground Fault and Overcurrent Protection Criteria for Coal Mine AC Distribution Systems

Details

• Personal Author:
  Kiefer JA ; Kohler, Jeffrey L.
• Description:
  Ground fault and overcurrent protection criteria for coal mine ac distribution systems were examined by authorization of the Bureau of Mines. The report begins with a literature review that discusses relaying topics including instrument transformers, ground fault pickup methods, static relaying, and comparison of relaying techniques. A chapter on ground fault relaying provides recommendations for maximum and minimum pickup levels as a function of maximum ground current and power system line-to-ground capacitance. Research in the area of phase overcurrent protection has resulted in a complete set of procedural recommendations for the selection and setting of overcurrent relays and current transformers, molded-case circuit breakers, and distribution system fuses in coal mine power systems. The final chapter discusses relay system maintenance and introduces a unique test set that is used to test the performance of relaying systems in coal mines. [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:
  1-174
• NIOSHTIC Number:
  nn:10002224
• NTIS Accession Number:
  PB82-137001
• Citation:
  NTIS: PB/82-137001; :1-174
• Federal Fiscal Year:
  1980
• Performing Organization:
  Ketron, Inc.
• Peer Reviewed:
  False
• Source Full Name:
  NTIS: PB/82-137001
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:a099215dee57c0bfcaf0bbf5e44f2567ac84016133d61db1a811ce92456d489efb9757469d8a5a425877fff7e8ee1f2ff4d7c0e4977250cc57bbf5951318aa2e
• Download URL:
  https://stacks.cdc.gov/view/cdc/234928/cdc_234928_DS1.pdf
• File Type:
  [PDF - 7.24 MB ]