Inventor · disambiguated record
Normann Fischer
Also filed as: FISCHER NORMANN
40 granted patents·2 pending applications·364 citations·filing 2005–2025
97Inventor score
Files withSCHWEITZER ENGINEERING LAB INC29KASZTENNY BOGDAN Z5SCHWEITZER EDMUND O III4FINNEY DALE S1GUZMAN-CASILLAS ARMANDO1
Top patents by PatentIndex Score
42 records- 0196US10819261B1Security improvements for electric power generator protectionSCHWEITZER ENGINEERING LAB INC·Filed 2020·Granted Oct 27, 2020·4 cites·20 claims
- 0296US7196884B2Apparatus 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
- 0394US7425778B2Apparatus 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
- 0494US7345488B2Apparatus 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
- 0593US10379991B2Systems and methods for routing sampled values upon loss of primary measurement equipmentSCHWEITZER ENGINEERING LAB INC·Filed 2017·Granted Aug 13, 2019·20 cites·20 claims
- 0692US8682496B2Electric power system automation using time coordinated instructionsSCHWEITZER EDMUND O III·Filed 2012·Granted Mar 25, 2014·18 cites·23 claims
- 0792US8289668B2Charging current compensation for line current differential protectionKASZTENNY BOGDAN Z·Filed 2009·Granted Oct 16, 2012·23 cites·25 claims
- 0892US7345863B2Apparatus and method for identifying a loss of a current transformer signal in a power systemSCHWEITZER ENGINEERING LAB INC·Filed 2005·Granted Mar 18, 2008·27 cites·54 claims
- 0991US11143715B2Broken conductor detection in a multiple-phase electric power delivery systemSCHWEITZER ENGINEERING LAB INC·Filed 2020·Granted Oct 12, 2021·3 cites·20 claims
- 1091US7903381B2Negative sequence differential elementSCHWEITZER ENGINEERING LAB INC·Filed 2008·Granted Mar 8, 2011·24 cites·25 claims
- 1190US10288688B2Systems and methods for monitoring and protecting an electric power generatorSCHWEITZER ENGINEERING LAB INC·Filed 2015·Granted May 14, 2019·5 cites·22 claims
- 1290US8154836B2Line current differential protection upon loss of an external time referenceKASZTENNY BOGDAN Z·Filed 2009·Granted Apr 10, 2012·18 cites·20 claims
- 1388US8275486B2Electric power system automation using time coordinated instructionsSCHWEITZER EDMUND O III·Filed 2010·Granted Sep 25, 2012·12 cites·20 claims
- 1488US8275485B2Electric power system automation using time coordinated instructionsSCHWEITZER EDMUND O III·Filed 2010·Granted Sep 25, 2012·11 cites·27 claims
- 1587US8553379B2Transformer differential protectionKASZTENNY BOGDAN Z·Filed 2009·Granted Oct 8, 2013·16 cites·31 claims
- 1687US8321162B2Minimizing circulating current using time-aligned dataLABUSCHAGNE CASPER A·Filed 2010·Granted Nov 27, 2012·17 cites·29 claims
- 1786US9007731B2Leveraging inherent redundancy in a multifunction IEDFINNEY DALE S·Filed 2012·Granted Apr 14, 2015·9 cites·36 claims
- 1884US11631972B2Accurate modeling of equipment overexcitation damage curvesSCHWEITZER ENGINEERING LAB INC·Filed 2020·Granted Apr 18, 2023·1 cites·22 claims
- 1984US8275487B2Electric power system automation using time coordinated instructionsSCHWEITZER EDMUND O III·Filed 2010·Granted Sep 25, 2012·7 cites·20 claims
- 2083US8559146B2Line current differential protection upon loss of an external time referenceKASZTENNY BOGDAN Z·Filed 2012·Granted Oct 15, 2013·6 cites·20 claims
- 2179US11316455B2Generator rotor turn-to-turn fault detection using fractional harmonicsSCHWEITZER ENGINEERING LAB INC·Filed 2020·Granted Apr 26, 2022·1 cites·20 claims
- 2277US10753976B2Detection of transient high torque events associated with rotating machinery in electric power systemsSCHWEITZER ENGINEERING LAB INC·Filed 2017·Granted Aug 25, 2020·2 cites·23 claims
- 2376US11196369B2Generator loss-of-field protectionSCHWEITZER ENGINEERING LAB INC·Filed 2019·Granted Dec 7, 2021·1 cites·19 claims
- 2475US10962608B1High-impedance fault detection using wireless current transformersSCHWEITZER ENGINEERING LAB INC·Filed 2019·Granted Mar 30, 2021·3 cites·20 claims
- 2573US8031447B2Transformer through-fault current monitorSCHWEITZER ENGINEERING LAB INC·Filed 2008·Granted Oct 4, 2011·6 cites·24 claims
- 2671US10474142B2Detection of cross-country faultsSCHWEITZER ENGINEERING LAB INC·Filed 2017·Granted Nov 12, 2019·1 cites·20 claims
- 2770US10270859B2Systems and methods for system-wide digital process bus fault recordingSCHWEITZER ENGINEERING LAB INC·Filed 2016·Granted Apr 23, 2019·1 cites·24 claims
- 2870US9128140B2Detection of a fault in an ungrounded electric power distribution systemSCHWEITZER ENGINEERING LAB INC·Filed 2014·Granted Sep 8, 2015·2 cites·20 claims
- 2969US12461171B2Single phase broken conductor detectionSCHWEITZER ENGINEERING LAB INC·Filed 2023·Granted Nov 4, 2025·0 cites·24 claims
- 3069US12249948B2Split-phase protection of generatorsSCHWEITZER ENGINEERING LAB INC·Filed 2022·Granted Mar 11, 2025·0 cites·18 claims
- 3167US12418168B2High-impedance differential protection using a diversity of signalsSCHWEITZER ENGINEERING LAB INC·Filed 2024·Granted Sep 16, 2025·0 cites·20 claims
- 3267US12176716B2Line reactor protection security using local frequency measurementSCHWEITZER ENGINEERING LAB INC·Filed 2023·Granted Dec 24, 2024·0 cites·20 claims
- 3364US12316112B2Breaker control units and related systems and methodsSCHWEITZER ENGINEERING LAB INC·Filed 2022·Granted May 27, 2025·0 cites·19 claims
- 3461US8649142B2Equivalent alpha plane fault determination for a multi-terminal power apparatusKASZTENNY BOGDAN Z·Filed 2009·Granted Feb 11, 2014·3 cites·29 claims
- 3560US7940054B2System and method to zero-sequence verify ground return path integrity by comparing measured zero-sequence current in an autotransformer with a second zero-sequence current sourceSCHWEITZER ENGINEERING LAB INC·Filed 2006·Granted May 10, 2011·3 cites·15 claims
- 3659US2025321292A1Method to detect single-phase-to-ground faults in electric power systemsSCHWEITZER ENGINEERING LAB INC·Filed 2025·Application pending·0 cites
- 3758US2025132599A1Adaptive protective relay event reportsSCHWEITZER ENGINEERING LAB INC·Filed 2023·Application pending·0 cites
- 3852US12504446B2Fault current sensor with adjacent phase fault immunitySCHWEITZER ENGINEERING LAB INC·Filed 2024·Granted Dec 23, 2025·0 cites·22 claims
- 3951US11411390B2Secure and dependable restricted earth fault protection for electric power generators and transformersSCHWEITZER ENGINEERING LAB INC·Filed 2020·Granted Aug 9, 2022·0 cites·20 claims
- 4051US8194374B2Differential element with harmonic blocking and harmonic restraint operating in parallelGUZMAN-CASILLAS ARMANDO·Filed 2009·Granted Jun 5, 2012·1 cites·26 claims
- 4150US10522995B2Overcurrent element in time domainSCHWEITZER ENGINEERING LAB INC·Filed 2017·Granted Dec 31, 2019·0 cites·9 claims
- 4229US9435835B2Validation of electric power system monitoring systemsWATKINS MATTHEW B·Filed 2011·Granted Sep 6, 2016·0 cites·27 claims
Join the waitlist — get patent alerts
Get an alert when Normann Fischer files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →