Media type: E-Article Title: Sensitive DC Ground Fault Relays for Coal Mines Contributor: Yenchek, Michael R.; Trutt, Frederick C.; Kohler, Jeffrey L.; Morley, Lloyd A.; Novak, Thomas Published: Institute of Electrical and Electronics Engineers (IEEE), 1987 Published in: IEEE Transactions on Industry Applications, IA-23 (1987) 4, Seite 736-741 Language: Not determined DOI: 10.1109/tia.1987.4504973 ISSN: 0093-9994 Keywords: Electrical and Electronic Engineering ; Industrial and Manufacturing Engineering ; Control and Systems Engineering Origination: Footnote: