Matches 1 - 50 out of 74 1 2 >


Match Document Document Title
US20150077130 Insulation fault locating system using branch-selective feeding, and selective insulation fault monitoring system and method for determining a cross-connection impedance between two subsystems  
The invention relates to an insulation fault locating system using branch-selective feeding and to a selective insulation monitoring system for a branched IT system composed of multiple...
US20100312506 DISTANCE-TO-FAULT MEASUREMENT SYSTEM CAPABLE OF MEASURING COMPLEX REFLECTION COEFFICIENTS  
Techniques are disclosed for computing distance-to-fault (DTF) in communication systems. The techniques can be embodied, for instance, in a DTF system that provides a multi-port probing device and...
US20080164884 Powered device power classification with increased current limit  
A system and method of classifying a high powered device (PD) with an increased current limit includes: connecting a voltage to the PD, measuring current through a classification resistor...
US20050212525 Advanced 24/7 differential oscilloscope with remote access and security features for detection of neutral to earth voltage  
A method and device displays and saves 24 hours a day and all year round short and long term duration neutral to earth voltage events which occur in the proximity of animals. The detailed real...
US20140300370 Efficient Method Based on the Electromagnetic Time Reversal to Locate Faults in Power Network  
A time reversal process for determining a fault location in an electrical power network comprising multi-conductor lines, comprises measuring at an observation point located anywhere along one of...
US20120086459 Apparatus and Method for Fault Detection and Location Determination  
An electrical waveform is received over an electrical power line. A plurality of nominal electrical parameters are determined for the electrical power network and the plurality of nominal...
US20140260638 AUTOMATED FAULT LOCALIZATION IN PIPELINES AND ELECTRICAL POWER TRANSMISSION LINES  
Methods and apparatus for determining an estimated physical location of a fault in a pipeline or electrical transmission line using localization devices coupled thereto. In an embodiment, a first...
US20150048841 FAULT LOCATION SYSTEM AND METHOD FOR DISTRIBUTION NETWORK  
A fault location system for a distribution network is disclosed. The fault location system includes at least one sensor and a fault location evaluation apparatus. The at least one sensor is...
US20130049764 Systems, Methods, and Apparatus for Locating Faults on an Electrical Distribution Network  
Certain embodiments of the invention include systems, methods, and apparatus for locating faults on an electrical distribution network. According to an example embodiment of the invention, a...
US20130300430 ISOLATION MONITOR  
An isolation monitor is disclosed in which a switchable bias voltage is imposed on a chassis ground. An isolation voltage is measured when a bias voltage is applied. When there are no electrical...
US20110037480 METHOD FOR FAULT LOCATION IN UNCOMPENSATED POWER LINES WITH TWO-END UNSYNCHRONIZED MEASUREMENT  
A method is provided for fault location in uncompensated power lines with two-end unsynchronized measurement, finding an application in the power industry and for overhead and overhead-cable...
US20110031977 SYSTEM AND METHOD FOR LOCATING LINE FAULTS IN A MEDIUM VOLTAGE NETWORK  
This invention relates to a method and system for locating line faults in a medium voltage network (3). Heretofore, the known methods and systems provided relatively limited resolution of fault...
US20080068027 Power line surge arrestor monitoring system  
A monitoring system in accordance with one embodiment comprising a plurality of surge arrestors; a plurality of probes coupled, each one of the plurality of probes coupled to one of the plurality...
US20130221977 FAULT DIRECTION PARAMETER INDICATOR DEVICE AND RELATED METHODS  
A method of determining a fault direction parameter of a fault on an AC transmission line of a power distribution system relative to a measurement location of the transmission line. The method...
US20120068717 FAULT LOCATION IN A NON-HOMOGENEOUS ELECTRIC POWER LINE  
Fault location on a non-homogeneous electric power line that includes a plurality of sections by determining a section in which negative-sequence voltage magnitude profiles calculated from each...
US20100244851 Fault Direction Determination  
The invention concerns a method and computer program product for determining the direction of fault in an electrical power system as well as to a fault handling device. In the fault handling...
US20090009181 Current Differential Protection Relays  
In the field of current differential protection relays there is a need for improvements in or relating to the protection relays to allow them to accommodate current transformer saturation while...
US20080079437 Current Sensing Module and Assembly Method Thereof  
A current sensing module for disposal proximate a conductor is disclosed. The current sensing module includes a housing having a first section and a second section that together define an opening...
US20070182421 APPARATUS FOR DETECTING AN ATTACK ON AN ELECTRIC CIRCUIT  
An apparatus for detecting an attack on an electric circuit, wherein the electric circuit includes a current consumption threshold value discriminator to determine whether current consumption of...
US20100102824 ELECTRICAL NETWORK FAULT LOCATION BY DISTRIBUTED VOLTAGE MEASUREMENTS  
A method of locating a fault on an electrical network energized by a source uses a form of triangulation of voltage measurements at least three different locations on the network, with at least...
US20090061367 APPLIANCE HAVING A SAFETY STRING  
A gas-fired appliance is disclosed that includes a gas valve powered by a power source. A plurality of switching units, each responsive to a condition of the appliance, are arranged in series...
US20130307557 APPARATUS AND METHOD FOR INSPECTING SHORT CIRCUIT DEFECTS  
A method of inspecting a short circuit defect between first wires extending in a first direction and a second direction intersecting the first direction and second wires extending in the first or...
US20140159740 FAULT IDENTIFICATION AND LOCATION IN A POWER SUPPLY LINE WHICH IS FED FROM ONE SIDE  
A power supply line is divided into a plurality of sections by switching devices each having an associated measurement device that detects a current signal at a measurement point at the respective...
US20120217975 INDUCTIVE MONITORING OF A POWER TRANSMISSION LINE OF AN ELECTRICAL NETWORK  
A method includes inductively coupling an electrical sensor to a transmission line associated with a node of an electrical network, and capturing power transmission information associated with the...
US20100026309 Modular Electrical System and Method for its Operation  
A modular electrical system including a first current-emitting source module and a first current-consuming sink module which is connected to the first current-emitting source module is provided....
US20110012607 METHOD AND APPARATUS FOR GENERALIZED AC AND DC ARC FAULT DETECTION AND PROTECTION  
According to the features discussed herein, through a single generalized arc-fault detection algorithm, various types of series and/or parallel arc faults can be detected without any nuisance trip...
US20080001605 Voltage detecting regulator with O2 sensor  
The present invention provides a voltage detecting regulator with O2 sensor, and this regulating device uses a voltage detecting unit and a regulating unit. The voltage detecting unit detects the...
US20090273350 Systems and Methods for Detecting Wire Breaks  
A circuit is provided that includes a power source and a sensor circuit electrically coupled by a switch to the power source. The circuit further includes an A/D converter electrically coupled to...
US20080174317 Semiconductor device  
A semiconductor device includes: a plurality of pins for receiving a plurality of external mount test signals; and a signal generating unit for generating a plurality of internal test mode signals...
US20140111219 METHOD FOR LOCATING SHORT CIRCUIT IN AN OVERHEAD POWER TRANSMISSION LINE BY UNSYNCHRONIZED MEASUREMENTS AT BOTH ENDS THEREOF  
The claimed invention relates to the power industry and can be used for locating short circuits in power transmission lines by measuring the instantaneous current and voltage values when...
US20100165527 PROTECTION FOR BI-DIRECTIONAL SWITCH  
A bi-directional protection circuit employs a single comparator for detecting fault conditions. Diodes are coupled between a detection node and voltage dividers setting references for inverting...
US20140077820 GSM/GPRS BASED METHOD, SYSTEM AND COMPUTER PROGRAMS TO DETERMINE AND LOCATE HIGH IMPEDANCE FAULTS ON MEDIUM VOLTAGE DISTRIBUTION NETWORKS IN HIGH RESISTIVITY  
Embodiments of the present invention include systems, methods, computer-readable media, and computer programs to determine and locate one or more faults on a distribution network in a high...
US20150070026 METHOD FOR DETERMINING A CAUSE OF A VOLTAGE OUTAGE LOAD-SIDE FROM A CIRCUIT BREAKER, AUXILIARY UNIT FOR A CIRCUIT BREAKER, ELECTRIC SYSTEM COMPRISING A CIRCUIT BREAKER AND ONE SUCH AUXILIARY UNIT  
In this method, the voltage outage load-side is an opening of the circuit breaker, and the circuit breaker is able to interrupt the flow of electric current in an electric connection including an...
US20060244462 System and method for characterizing power on a local area network  
A tester for characterizing an Ethernet connection is provided. In one example the tester has a connector for coupling to an Ethernet port. The connector has a set of output lines connected to a...
US20060226849 Method and device for detecting a current  
A method and device for detecting a current are described. The present invention displays a value and looks for loads current of the CPU through an LED, a 7-segment display or a display monitor.
US20100085059 DIFFERENTIAL POWER DETECTION  
A method of determining a differential power condition includes comparing a voltage across a resistor to a first threshold. The voltage across the resistor is proportional to a difference between...
US20080211511 Method of Generating Fault Indication in Feeder Remote Terminal Unit for Power Distribution Automation System  
The present invention relates to a method of generating fault indication in a feeder remote terminal unit for a power distribution automation system. The method is performed in a distribution...
US20090140745 Power converter current sensor testing method  
A method of testing power converter current sensors is disclosed. The method may include receiving a current sensor test request and receiving measured currents from current measurements from the...
US20090184717 METHODS FOR COMMON MODE VOLTAGE-BASED AC FAULT DETECTION, VERIFICATION AND/OR IDENTIFICATION  
Methods for AC fault (ACF) detection are provided. In addition, methods for AC fault (ACF) detection and verification are provided. In addition, methods for identification of a module which is the...
US20110298470 DETECTION OF WELDED SWITCH CONTACTS IN A LINE CONVERTER SYSTEM  
A system for the detection of welded contacts in a circuit of a line converter system has a plurality of inverter switches, a plurality of utility switches in which a pair of utility switches is...
US20100309591 IMPEDANCE-BASED CURRENT SENSOR  
Arc fault detection method and apparatus employ an impedance-based current sensor to provide a sensing signal indicative of current through a conductor. The impedance-based current sensor diverts...
US20090309607 METHOD AND CIRCUIT ARRANGEMENT FOR DETECTING THE STATE OF A LOAD DEVICE WHICH CAN BE CONNECTED TO A SWITCHING CONNECTION  
A method for detecting the state of a load device which can be connected to a switching connection, wherein the switching connection can be coupled to, and decoupled from, a predefined switching...
US20140198420 Fault-Likely Detector  
A method, device, and system for detecting a fault for a protective device. The device can receive an input signal and detect a power spike in the input signal. If a power spike is detected in the...
US20140336959 FAULT LOCATION IN POWER DISTRIBUTION SYSTEMS  
A method of locating a fault on an electricity transmission line is disclosed. The transmission line has a known line impedance and is operable to transport electricity at one or more system...
US20140035596 DISPLAY APPARATUS AND METHOD FOR DETECTING ERROR FROM VOLTAGE THEREOF  
A display apparatus and a method for detecting a voltage error thereof, include a display unit which displays an image, a voltage supply which supplies a voltage to respective elements of the...
US20110058296 Method of Detecting a Fault Condition of a Load Control Device  
A load control device comprises a bidirectional semiconductor switch for controlling the amount of power delivered to an electrical load, and the bidirectional semiconductor switch further...
US20150102824 LOCATING LOOSE CONNECTIONS IN AN ELECTRICAL CIRCUIT  
An electrical system includes an electrical circuit having a plurality of current paths and a plurality of switches for directing current to the plurality of current paths. A sensor senses a...
US20070279068 Power diagnostic system and method  
A power diagnostic system and method for detecting faults is provided. The system includes a processor coupled to a plurality of sampling blocks; wherein the plurality of sampling blocks...
US20100259275 DEVICE FOR DETECTING AND LOCATING ELECTRIC DISCHARGES IN FLUID-INSULATED ELECTRICAL EQUIPMENT  
A device for detecting and locating at least one electric discharge in equipment insulated by fluid contained in an electrically-conductive housing. The equipment includes a plurality of grounding...
US20050127921 Voltage detecting circuit  
To provide a voltage detecting circuit, in which a leakage current of an output transistor is suppressed to reduce a consumed current without reducing a driving ability of the output transistor....

Matches 1 - 50 out of 74 1 2 >