Inventor
ROBERTS JEFFREY B
US32 patents
⚠️ This page may combine multiple inventors who share the name “ROBERTS JEFFREY B”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SCHWEITZER ENGINEERING LAB INC
26 patentsUS6256592B1Jul 3, 2001
Multi-ended fault location system
SCHWEITZER ENGINEERING LAB INC104 citations97
US6590397B2Jul 8, 2003
Line differential protection system for a power transmission line
SCHWEITZER ENGINEERING LAB INC73 citations96
US6028754AFeb 22, 2000
System for preventing undesired protective relay tripping actions due to coupling capacitor voltage transformer transients
SCHWEITZER ENGINEERING LAB INC54 citations96
US5703745ADec 30, 1997
System for detection of transients from a coupling capacitor voltage transformer used in a protective relay
SCHWEITZER ENGINEERING LAB INC63 citations96
US6573726B1Jun 3, 2003
Sensitive ground fault detection system for use in compensated electric power distribution networks
SCHWEITZER ENGINEERING LAB INC64 citations94
US6518767B1Feb 11, 2003
Line differential protection system for a power transmission line
SCHWEITZER ENGINEERING LAB INC115 citations94
US6839210B2Jan 4, 2005
Bus total overcurrent system for a protective relay
SCHWEITZER ENGINEERING LAB INC38 citations93
US6785105B2Aug 31, 2004
Ground fault detection system for ungrounded power systems
SCHWEITZER ENGINEERING LAB INC20 citations93
US6011480AJan 4, 2000
Protection quality capability for protective relays used in an electric power system
SCHWEITZER ENGINEERING LAB INC52 citations93
US5694281ADec 2, 1997
Zero sequence voltage-polarized directional element for protective relays
SCHWEITZER ENGINEERING LAB INC50 citations93
US5515227AMay 7, 1996
Fault identification system for use in protective relays for power transmission lines
SCHWEITZER ENGINEERING LAB INC47 citations93
US5365396ANov 15, 1994
Negative sequence directional element for a relay useful in protecting power transmission lines
SCHWEITZER ENGINEERING LAB INC26 citations93
US5349490ASep 20, 1994
Negative sequence directional element for a relay useful in protecting power transmission lines
SCHWEITZER ENGINEERING LAB INC29 citations93
US6721671B2Apr 13, 2004
Directional element to determine faults on ungrounded power systems
SCHWEITZER ENGINEERING LAB INC43 citations92
US6608742B2Aug 19, 2003
Voltage and current source selection system for use in the protection, automation and control of an electric power system
SCHWEITZER ENGINEERING LAB INC36 citations92
US6417791B1Jul 9, 2002
Delta filter with an adaptive time window for protective relays
SCHWEITZER ENGINEERING LAB INC40 citations92
US5883578AMar 16, 1999
Loss of potential determination for use in protective relays for electric power systems
SCHWEITZER ENGINEERING LAB INC25 citations92
US5808845ASep 15, 1998
System for preventing sympathetic tripping in a power system
SCHWEITZER ENGINEERING LAB INC24 citations92
US5731943AMar 24, 1998
Protective relay having out-of-step logic capability
SCHWEITZER ENGINEERING LAB INC50 citations92
US7582986B2Sep 1, 2009
Compensated inverse-time undervoltage load shedding systems
SCHWEITZER ENGINEERING LAB INC42 citations91
US6101075AAug 8, 2000
System for improving protective relay coordination with other protective elements in power system
SCHWEITZER ENGINEERING LAB INC11 citations74
US6084755AJul 4, 2000
Protective relay-based monitoring system of DC power within an electric power substation
SCHWEITZER ENGINEERING LAB INC9 citations74
US5602707AFeb 11, 1997
Detection of transformer high side fuse operations in a power transmission system
SCHWEITZER ENGINEERING LAB INC12 citations74
US5041737AAug 20, 1991
Programmable bus-tie relay having a plurality of selectable setting groups
SCHWEITZER ENGINEERING LAB INC17 citations74
US5790418AAug 4, 1998
Adaptive polarizing memory voltage time constant
SCHWEITZER ENGINEERING LAB INC10 citations73
US5262679ANov 16, 1993
Polarizing potential transfer switch circuit for use with power transmission lines
SCHWEITZER ENGINEERING LAB INC11 citations69