Inventor

FISCHER NORMANN

US41 patents

⚠️ This page may combine multiple inventors who share the name “FISCHER NORMANN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

FISCHER NORMANN

SCHWEITZER ENGINEERING LAB INC

Apparatus and method for detecting the loss of a current transformer connection coupling a current differential relay to an element of a power system

Systems and methods for routing sampled values upon loss of primary measurement equipment

Negative sequence differential element

Apparatus and method for identifying a loss of a current transformer signal in a power system

Apparatus and method for determining a faulted phase of a three-phase ungrounded power system

Apparatus and method for compensating secondary currents used in differential protection to correct for a phase shift introduced between high voltage and low voltage transformer windings

Security improvements for electric power generator protection

Systems and methods for monitoring and protecting an electric power generator

Broken conductor detection in a multiple-phase electric power delivery system

High-impedance fault detection using wireless current transformers

Detection of transient high torque events associated with rotating machinery in electric power systems

Transformer through-fault current monitor

Breaker control units and related systems and methods

System 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 source

Accurate modeling of equipment overexcitation damage curves

Generator loss-of-field protection

Detection of cross-country faults

Detection of a fault in an ungrounded electric power distribution system

Generator rotor turn-to-turn fault detection using fractional harmonics

Systems and methods for system-wide digital process bus fault recording

Single phase broken conductor detection

Split-phase protection of generators

Line reactor protection security using local frequency measurement

Secure and dependable restricted earth fault protection for electric power generators and transformers

High-impedance differential protection using a diversity of signals

Adaptive clock offset estimation for protection devices without time-based synchronization

Overcurrent element in time domain

Fault current sensor with adjacent phase fault immunity

KASZTENNY BOGDAN Z

Charging current compensation for line current differential protection

Line current differential protection upon loss of an external time reference

Line current differential protection upon loss of an external time reference

Transformer differential protection

Equivalent alpha plane fault determination for a multi-terminal power apparatus

SCHWEITZER EDMUND O III

Electric power system automation using time coordinated instructions

Electric power system automation using time coordinated instructions

Electric power system automation using time coordinated instructions

Electric power system automation using time coordinated instructions

LABUSCHAGNE CASPER A

Minimizing circulating current using time-aligned data

FINNEY DALE S

Leveraging inherent redundancy in a multifunction IED

GUZMAN-CASILLAS ARMANDO

Differential element with harmonic blocking and harmonic restraint operating in parallel

WATKINS MATTHEW B

Validation of electric power system monitoring systems