Assignee
SCHWEITZER ENGINEERING LAB INC
US·647 granted patents·72 pending applications·6,577 citations·filing 1989–2025
Top patents by PatentIndex Score
719 records- 0199US9627881B2Fault detection in electric power delivery systems using underreach, directional, and traveling wave elementsSCHWEITZER ENGINEERING LAB INC·Filed 2016·Granted Apr 18, 2017·26 cites·12 claims
- 0299US9594112B2Fault detection in electric power delivery systems using underreach, directional, and traveling wave elementsSCHWEITZER ENGINEERING LAB INC·Filed 2015·Granted Mar 14, 2017·29 cites·23 claims
- 0399US8655609B2Fault location using traveling wavesSCHWEITZER ENGINEERING LAB INC·Filed 2012·Granted Feb 18, 2014·57 cites·34 claims
- 0498US11283835B1Systems and methods for establishing a secure communication link in an electric power distribution systemSCHWEITZER ENGINEERING LAB INC·Filed 2020·Granted Mar 22, 2022·32 cites·19 claims
- 0598US10581237B2High-frequency electric power system signal processing systemSCHWEITZER ENGINEERING LAB INC·Filed 2016·Granted Mar 3, 2020·14 cites·20 claims
- 0698US9470748B2Fault detection in electric power delivery systems using underreach, directional, and traveling wave elementsSCHWEITZER ENGINEERING LAB INC·Filed 2015·Granted Oct 18, 2016·31 cites·24 claims
- 0798US8990036B1Power line parameter adjustment and fault location using traveling wavesSCHWEITZER ENGINEERING LAB INC·Filed 2014·Granted Mar 24, 2015·39 cites·21 claims
- 0898US8781766B2Fault location using traveling wavesSCHWEITZER ENGINEERING LAB INC·Filed 2013·Granted Jul 15, 2014·31 cites·19 claims
- 0998US7382272B2System, a tool and method for communicating with a faulted circuit indicator using a remote displaySCHWEITZER ENGINEERING LAB INC·Filed 2005·Granted Jun 3, 2008·118 cites·37 claims
- 1098US7227441B2Precision Rogowski coil and method for manufacturing sameSCHWEITZER ENGINEERING LAB INC·Filed 2005·Granted Jun 5, 2007·68 cites·22 claims
- 1198US6845333B2Protective relay with synchronized phasor measurement capability for use in electric power systemsSCHWEITZER ENGINEERING LAB INC·Filed 2003·Granted Jan 18, 2005·134 cites·22 claims
- 1298US6662124B2Protective relay with synchronized phasor measurement capability for use in electric power systemsSCHWEITZER ENGINEERING LAB INC·Filed 2002·Granted Dec 9, 2003·143 cites·15 claims
- 1397US10310005B2Time-domain distance line protection of electric power delivery systemsSCHWEITZER ENGINEERING LAB INC·Filed 2018·Granted Jun 4, 2019·7 cites·19 claims
- 1497US10180451B2Electric power system monitoring using high-frequency signalsSCHWEITZER ENGINEERING LAB INC·Filed 2016·Granted Jan 15, 2019·12 cites·20 claims
- 1597US10090664B2Time-domain directional line protection of electric power delivery systemsSCHWEITZER ENGINEERING LAB INC·Filed 2016·Granted Oct 2, 2018·11 cites·20 claims
- 1697US7630863B2Apparatus, method, and system for wide-area protection and control using power system data having a time component associated therewithSCHWEITZER ENGINEERING LAB INC·Filed 2007·Granted Dec 8, 2009·117 cites·24 claims
- 1797US7480580B2Apparatus and method for estimating synchronized phasors at predetermined times referenced to an absolute time standard in an electrical systemSCHWEITZER ENGINEERING LAB INC·Filed 2006·Granted Jan 20, 2009·47 cites·62 claims
- 1897US7227442B2Precision printed circuit board based rogowski coil and method for manufacturing sameSCHWEITZER ENGINEERING LAB INC·Filed 2005·Granted Jun 5, 2007·62 cites·20 claims
- 1996US11211788B2Fire risk mitigation in electric power systemsSCHWEITZER ENGINEERING LAB INC·Filed 2020·Granted Dec 28, 2021·7 cites·19 claims
- 2096US10819261B1Security improvements for electric power generator protectionSCHWEITZER ENGINEERING LAB INC·Filed 2020·Granted Oct 27, 2020·4 cites·20 claims
- 2196US9520860B2Time distribution switchSCHWEITZER ENGINEERING LAB INC·Filed 2013·Granted Dec 13, 2016·24 cites·20 claims
- 2296US7930117B2Systems and methods for power swing and out-of-step detection using time stamped dataSCHWEITZER ENGINEERING LAB INC·Filed 2008·Granted Apr 19, 2011·34 cites·65 claims
- 2396US7710693B2Apparatus and method for providing protection for a synchronous electrical generator in a power systemSCHWEITZER ENGINEERING LAB INC·Filed 2006·Granted May 4, 2010·77 cites·16 claims
- 2496US7463467B2Relay-to-relay direct communication system and method in an electric power systemSCHWEITZER ENGINEERING LAB INC·Filed 2005·Granted Dec 9, 2008·43 cites·29 claims
- 2596US7196884B2Apparatus and method for detecting the loss of a current transformer connection coupling a current differential relay to an element of a power systemSCHWEITZER ENGINEERING LAB INC·Filed 2005·Granted Mar 27, 2007·47 cites·39 claims
- 2696US5680324ACommunications processor for electric power substationsSCHWEITZER ENGINEERING LAB INC·Filed 1995·Granted Oct 21, 1997·130 cites·24 claims
- 2796US5317472AApparatus for insuring the security of output signals from protective relays used in electric power systemsSCHWEITZER ENGINEERING LAB INC·Filed 1992·Granted May 31, 1994·116 cites·10 claims
- 2895US11336564B1Detection of active hosts using parallel redundancy protocol in software defined networksSCHWEITZER ENGINEERING LAB INC·Filed 2021·Granted May 17, 2022·8 cites·22 claims
- 2995US11112815B1Fault isolation and restoration schemeSCHWEITZER ENGINEERING LAB INC·Filed 2020·Granted Sep 7, 2021·7 cites·17 claims
- 3095US10833507B2Island detection and control of a microgridSCHWEITZER ENGINEERING LAB INC·Filed 2017·Granted Nov 10, 2020·9 cites·21 claims
- 3195US10649020B2High-impedance fault detection using coordinated devicesSCHWEITZER ENGINEERING LAB INC·Filed 2017·Granted May 12, 2020·7 cites·23 claims
- 3295US10310004B2Time-domain differential line protection of electric power delivery systemsSCHWEITZER ENGINEERING LAB INC·Filed 2016·Granted Jun 4, 2019·6 cites·20 claims
- 3395US9769060B2Simulating, visualizing, and searching traffic in a software defined networkSCHWEITZER ENGINEERING LAB INC·Filed 2015·Granted Sep 19, 2017·27 cites·19 claims
- 3495US9686125B2Network reliability assessmentSCHWEITZER ENGINEERING LAB INC·Filed 2015·Granted Jun 20, 2017·29 cites·20 claims
- 3595US7856327B2State and topology processorSCHWEITZER ENGINEERING LAB INC·Filed 2008·Granted Dec 21, 2010·25 cites·74 claims
- 3695US7660088B2System, apparatus and method for compensating the sensitivity of a sequence element in a line current differential relay in a power systemSCHWEITZER ENGINEERING LAB INC·Filed 2006·Granted Feb 9, 2010·57 cites·52 claims
- 3795US7570469B2Dynamically configurable relay element and related methodsSCHWEITZER ENGINEERING LAB INC·Filed 2006·Granted Aug 4, 2009·36 cites·40 claims
- 3895US7474192B2Precision Rogowski coil and method for manufacturing sameSCHWEITZER ENGINEERING LAB INC·Filed 2007·Granted Jan 6, 2009·30 cites·6 claims
- 3995US7398411B2Self-calibrating time code generatorSCHWEITZER ENGINEERING LAB INC·Filed 2005·Granted Jul 8, 2008·41 cites·30 claims
- 4094US11598800B2Distance elements for line protection near unconventional sourcesSCHWEITZER ENGINEERING LAB INC·Filed 2022·Granted Mar 7, 2023·2 cites·22 claims
- 4194US11152916B2Generating a representation of high-frequency electric power delivery system data using deviations from a trendSCHWEITZER ENGINEERING LAB INC·Filed 2020·Granted Oct 19, 2021·4 cites·18 claims
- 4294US11012016B2Energy packet control of generator prime moverSCHWEITZER ENGINEERING LAB INC·Filed 2020·Granted May 18, 2021·4 cites·20 claims
- 4394US10951057B1Reliable power module for improved substation device availabilitySCHWEITZER ENGINEERING LAB INC·Filed 2020·Granted Mar 16, 2021·4 cites·20 claims
- 4494US10637233B2Fault magnitude calculation during current transformer saturationSCHWEITZER ENGINEERING LAB INC·Filed 2018·Granted Apr 28, 2020·9 cites·20 claims
- 4594US9509399B2Transmission line protection using traveling waves in optical ground wire fiberSCHWEITZER ENGINEERING LAB INC·Filed 2016·Granted Nov 29, 2016·8 cites·20 claims
- 4694US9160158B2Coordinated high-impedance fault detection systems and methodsSCHWEITZER ENGINEERING LAB INC·Filed 2013·Granted Oct 13, 2015·13 cites·20 claims
- 4794US7720619B2Systems and methods for detecting high-impedance faults in a multi-grounded power distribution systemSCHWEITZER ENGINEERING LAB INC·Filed 2006·Granted May 18, 2010·35 cites·37 claims
- 4894US7460590B2Handheld communication tester and method for testing direct serial communication capability of an intelligent electronic device in a power systemSCHWEITZER ENGINEERING LAB INC·Filed 2005·Granted Dec 2, 2008·31 cites·34 claims
- 4994US7425778B2Apparatus and method for compensating secondary currents used in differential protection to correct for a phase shift introduced between high voltage and low voltage transformer windingsSCHWEITZER ENGINEERING LAB INC·Filed 2005·Granted Sep 16, 2008·41 cites·47 claims
- 5094US7345488B2Apparatus and method for determining a faulted phase of a three-phase ungrounded power systemSCHWEITZER ENGINEERING LAB INC·Filed 2005·Granted Mar 18, 2008·31 cites·29 claims
Showing the top 50 of 719 patent records by PatentIndex Score.
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