Sensitive dc ground fault relays for coal mines

Michael R. Yenchek, Frederick C. Trutt, Jeffrey L. Kohler, Lloyd A. Morley, Thomas Novak

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Recent US Bureau of Mines sponsored research aimed at virtually eliminating electrocutions on de utilization cireuits has resulted in an effective dc cireuit protection device, called a sensitive ground fault relay (GFR). This relay can detect and act to interrupt small deadly ground currents that can trigger ventricular fibrillation in humans while ignoring spurious power System Signals. Initially relay Performance criteria were established to ensure reliability for mine duty as well as effectiveness for shock prevention. Mineworthy prototypes, consisting of a saturable-transformer current sensor and an electronic relay, were construeted. They complied with the Performance Standards in laboratory tests.

Original languageEnglish
Pages (from-to)736-741
Number of pages6
JournalIEEE Transactions on Industry Applications
Issue number4
StatePublished - 1987

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


Dive into the research topics of 'Sensitive dc ground fault relays for coal mines'. Together they form a unique fingerprint.

Cite this