Title :
How sensitive is your ground fault protection?
Author :
Judd, Michael Ray ; Davis, James Stuart
Author_Institution :
Allgeier, Martin & Associates, Inc., Joplin, MO
Abstract :
Single-phase reclosers are the normal choice for rural electric cooperatives which is designed to open for a continuous load of 140 A. However, when load currents exceeds the 70 A/phase range, three-phase reclosers are often selected to meet the increased load current requirements. The increased phase current settings cannot sense or interrupt for a minimum fault associated. Neutral current settings or ground trip settings provide a method for increased sensitivity for minimum faults
Keywords :
earthing; fault currents; power system faults; power system protection; sensitivity; 140 A; fault sensitivity; ground fault protection; ground trip; neutral current setting; three phase recloser; Distributed computing; Fault currents; Fault location; Ice; Impedance; Protection; Sparks; Springs; Substations;
Journal_Title :
Industry Applications Magazine, IEEE
DOI :
10.1109/MIA.2006.1678386
