Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Directional element to determine faults on ungrounded power systems

Directional element to determine faults on ungrounded power systems

US Patent 6721671 · Granted Apr 13, 2004

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Method, apparatus and computer program product for fault protection2011
Compensated inverse-time undervoltage load shedding systems2009
Method for protecting an electric generator2008
Bus total overcurrent system for a protective relay2005
Ground fault detection system for ungrounded power systems2004
Voltage and current source selection system for use in the protection, automatio2003
Line differential protection system for a power transmission line2003
Sensitive ground fault detection system for use in compensated electric power di2003
System for obtaining phase-ground voltages from a broken delta VT voltage connec2003
Fault type selection system for identifying faults in an electric power system2003
Line differential protection system for a power transmission line2003
Delta filter with an adaptive time window for protective relays2002