Abstract: A fault current limiter is provided. According to an embodiment of the present disclosure, the fault current limiter includes a switch whose contact point is opened when a fault current occurs; a current limiting element configured to limit the fault current when the fault current occurs; and a diode being serial-connected to the current limiting element, wherein a breakdown voltage of the diode is higher than a voltage drop by an impedance of the switch when a normal current flows.

Abstract: A method of and apparatus for fault detection utilizing a diagnostic procedure by a diagnostic device to detect a short circuit between at least two of a plurality of load electrical connections, the diagnostic procedure comprising applying a test electrical signal to each of the load electrical connections in turn and while applying the test electrical signal to a first one of the load electrical connections, detecting whether an electrical output is present, in response, on any other of the load electrical connections, wherein the detecting by the diagnostic device includes applying the test electrical signal to the first one of the load electrical connections in an operational mode of the apparatus when an electrically controlled switch connected to the first one of the load electrical connections is in an off state.

Abstract: The present invention provides a method to ensure that distributed resources of a power distribution system remain connected to the circuitry of the power distribution system when a fault occurs at a distributed resource node to assist in identifying the location of the fault by continuing to inject a direct current (DC) signal from the controllable voltage source converter of at least one DC voltage distributed resource into the distribution system and modulating an alternating current (AC) signal on top of the direct current (DC) signal.

Abstract: Devices (10) support a use of investigation signals for investigating cable systems comprising cables (101) and loads (111). The loads (111) comprise rectifier circuits (201) coupled to storage circuits (202). The devices (10) comprise charger circuits (1) for producing charging signals for charging the storage circuits (202) such that they have reduced impacts on performances of the investigation signals. The devices (10) may further comprise discharger circuits (2) for discharging signaling circuits (121) after being charged by the charger circuits (1). The devices (10) may further comprise investigation circuits (3) for producing the investigation signals and controller circuits (4) for controlling the other circuits (1-3) and reception circuits (5) for receiving responses to the investigation signals and analysis circuits (6) for analyzing the responses in view of the investigation signals and for in response to analysis results defining a problem (102-104) and/or a location of a problem (102-104).

Abstract: A method and apparatus for discriminating between electric field sources. In one embodiment, the apparatus comprises a mobile detection system comprising a sensor probe for remotely measuring an electric field generated by an electric field source in a patrolled area; and a processor, coupled to the sensor probe, for processing data received from the sensor probe to generate a first field strength and at least a second field strength for determining whether the electric field source is potentially hazardous.

Abstract: The present invention provides a method to ensure that distributed resources of a power distribution system remain connected to the circuitry of the power distribution system when a fault occurs at a distributed resource node to assist in identifying the location of the fault by continuing to inject current from the distributed resources into the distribution system, wherein at least one of the distributed resources is a cogeneration resource.

Abstract: The present invention provides a system to ensure that distributed resources of a power distribution system remain connected to the circuitry of the power distribution system when a fault occurs at a distributed resource node to assist in identifying the location of the fault by continuing to inject current from the distributed resources into the distribution system, wherein at least one of the distributed resources is a solar panel.

Abstract: The invention relates to a controller, and more particularly, to systems, devices and methods of processing multiple sensor signals of a gyroscope. The signal processor includes: a front end amplifier for converting a signal into a voltage variation signal; at least one analog-to-digital converter coupled to the front end amplifier and operative to convert an analog signal into a digital signal; and at least one demodulator coupled to the analog-to-digital converter and operative to demodulate the digital signal to thereby extract an envelope signal therefrom.

Abstract: The invention relates to a jib-bracing system for a revolving tower crane, in the case of which the length of a jib (2) and the length of a bracing means (5) for the jib can each be changed. The bracing means comprises at least part of a cable (6) of which one end can be connected to the jib at at least two different fixed points (8, 9) arranged on the jib, wherein a deflecting element (7), over which the cable can be guided, is arranged on the jib, and wherein the one end of the cable can be fastened at at least one of the fixed points when the cable has been guided over the deflecting element.

Abstract: An electrical power supply device includes a DC voltage source with terminals, a controller, and an insulation-defect detecting device for detecting an insulation defect of the voltage source. The device has input terminals connected to source terminals, and circuits connected between respective input terminals and an intermediate point. The insulation-defect current-detection circuit connects between ground and the intermediate point. Both circuits have current-limiter circuits that open and close a connection between respective inputs and the intermediate point. Both current-limiter circuits are rated for traversal by a current of less than a standardized safety threshold when the first current-limiter circuit is closed and one of the terminals of the DC voltage source is shorted to ground. The control circuit is configured to simultaneously keep one current-limiter circuits open and the other closed.

Abstract: The system control apparatus for equipment for causing equipment to collaboratively operate includes: equipment profile management means for managing an equipment profile that is metadata representing the electrical properties of the equipment; control scenario management means for managing a control scenario in which is described metadata that states an operation to be fulfilled by the equipment; equipment detection means for detecting control-targeted equipment; electrical status monitoring means for monitoring an electrical status related to transfer of electrical power caused by equipment interconnections; equipment selection means for selecting equipment for use on the basis of the metadata described in the control scenario and the equipment profile; and control execution means for controlling the selected equipment.

Abstract: An RFVGA variably controls a gain according to an RFVGA gain control signal and amplifies and outputs a reception signal. A low-pass filter filters a signal output from a frequency converter. An OFDM demodulator generates a digital signal based on an output signal from the low-pass filter. A power detection evaluation circuit controls the RFVGA gain control signal based on a voltage value (DET0) of the RFVGA gain control signal or a voltage value (DET1) of the output signal from the RFVGA, and a voltage value (DET3) of an output signal from the low-pass filter and a voltage value (DET2) of an intermediate node of the low-pass filter.

Abstract: The present invention provides a method to ensure that distributed resources of a power distribution system remain connected to the circuitry of the power distribution system when a fault occurs at a distributed resource node to assist in identifying the location of the fault by continuing to inject current from the distributed resources into the distribution system. The system contains multiple power electronics based converters which convert the local direct current (DC) distributed sources (DRs) to the alternating current (AC) of the grid. The converters also provide the capability of limiting the current in the system when a fault occurs. The converters also protect the power distribution system equipment against high fault currents.

Abstract: Current imbalance may be detected in a 3-phase power system by monitoring current output between two points of a phase signal provided along wire pairs from an inverter to a motor. In some embodiments, each wire of a wire pair leading to the motor from the inverter may be provided with a line current sensor. A comparison of current output from each wire in the wire pair may be performed to determine if a current imbalance is present. In some embodiments, a phase current sensor may be coupled to a phase input of the inverter. Failures in the 3-phase system may be detected by measuring the output from each phase current sensor for imbalanced distribution of power output. In some embodiments, the output from the phase current sensors may be compared to an output of a line current sensor along the same phase for current imbalances or harness failures.

Abstract: A local positioning system uses a power delivery network throughout a facility to easily deploy inexpensive electromagnetic receivers for capturing location fingerprints from the transmission of wireless devices. These captured fingerprints are then compared with a database of similar fingerprints compiled from a facility surveying process. Location of the wireless device is inferred from the known location corresponding to that survey-derived fingerprint that is most highly correlated with the fingerprint derived from the wireless device. The known location may then be used to provide a logical mapping of the wireless device within facility floor plans or the like.

Abstract: This invention concerns methods and devices for calibrating a partial discharge measuring device and for locating faults on cables. In the method, calibration signals, which can include a band-limited white noise, are used with a periodically repeated signal course. By averaging over a predetermined period duration (T) of the calibration signal, it is possible, in the case of a partial discharge measurement, to recalibrate the measuring device continuously during the measurement, and additionally on cables to determine the fault location with great precision.

Abstract: A device for detecting the insulation resistance of a high-voltage battery system of a motor vehicle that includes a high-voltage battery and a high-voltage component which is operatively connected to terminals of the high-voltage battery via converters. The device includes a reference resistor operatively connected to the terminals of the high-voltage battery via switches, with a voltage measurement device configured to detect the voltage present between each respective terminal and a reference potential of the vehicle; a voltage measurement device configured to measure the voltage between the terminals; and a coupling circuit configured to monitor the high-voltage component when the contactors are open.

Abstract: A device and method for protection of an electrical apparatus against touch currents, the device configured to be connected between a source of electrical power and a device onboard a motor vehicle, and including a circuit for detecting leakage currents and for estimating touch currents, configured to be connected to the electrical connection lines of the apparatus, a circuit measuring frame current, and a mechanism controlling operation of the apparatus according to the estimated level of the touch currents and the measured level of the frame current. The device and method can in one embodiment be used to protect against leakage currents during recharging of a hybrid or electrically driven motor vehicle.

Abstract: An insulation detection circuit suitable for detecting an insulation status between a high voltage power and a low voltage power of a vehicle is disclosed. The circuit includes a first energy storage unit, a second energy storage unit, a constant current unit, and a detection unit. The first energy storage unit is coupled to the high voltage power. The second energy storage unit is coupled between the first energy storage unit and the low voltage power. The constant current unit is coupled between the first energy storage unit and the second energy storage unit. The detection unit is coupled to the second energy storage unit for detecting a current change of the second energy storage unit. When the detection unit detects that current flowing through the second energy storage unit is smaller than a predetermined value, a detection signal representing that the insulation status is abnormal is outputted.

Abstract: An energy supply system including an electrical energy storage system having multiple storage modules, in particular a battery system, an ascertaining device for ascertaining state variables of the storage modules and an energy transmission device for energy transmission between the storage modules and a downstream electrical device. It is provided that the energy transmission device has multiple d.c. chopper converters, which are connected to one another in parallel and/or in series at the output end, and each of the d.c. chopper converters is connectable to a storage module of the energy storage system, and the energy supply system has a trigger device for triggering the d.c. chopper converters as a function of the ascertained state variable of the respective connected storage module. Also described is a method for operating an energy supply system.

Abstract: It is an object of the invention to, in fault detection of a PWM load device, provide a fault detection device and a fault detection method, which are capable of appropriately detecting fault of the load device in the case where such load device is connected the duty ratio of the PWM waveform of which is different, or where such load device is connected the magnitude of current of which is different. The fault detection device samples a current flowing through the load device on a predetermined cycle, decides, based on sampled values, a current-driven period and decides, by using sampled values in the current-driven period, a drive current value for determining whether or not there is a fault.

Abstract: 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 unsynchronized measurements are taken at both ends of the line. It is a technological object of the invention to improve the accuracy of damage location. The technical result of the invention is achieved by accurately synchronizing the current and voltage values measured at the ends of the line and unsynchronized in time on measurement. Synchronization is effected by aligning the oscillograms at both ends of the line with the short circuit start section.

Abstract: 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 faults, the isolation voltage swings up and down to known values. When a fault occurs, the isolation voltage will not to swing to the known values, and thus the isolation resistance can be measured and alarm generated if the isolation resistance falls below a threshold value.

Abstract: An integrated circuit structure can include a plurality of solder bumps coupled in series forming a chain and a plurality of diodes, wherein each diode is coupled to one of the plurality of solder bumps. The integrated circuit structure also can include a first pad coupled to the solder bump of the plurality of solder bumps at an end of the chain. The first pad can be configured to provide a test current responsive to application of a forward bias voltage to each diode of the plurality of diodes.

Abstract: An apparatus for measuring electrical parameters for an electrical system measures a first and second parameters of the electrical system between connections to the electrical system. A processor determines a third electrical parameter of the electrical system as a function of the first parameter and the second parameter. Wireless communication is provided between components of the apparatus.

Abstract: An electrical joint monitoring device including a mounting assembly and a wireless transponder unit. The mounting assembly includes a first conductive contact structured to electrically connect to a first conductive member of an electrical joint and a second conductive contact structured to electrically connect to a second conductive member of the electrical joint. The wireless transponder unit includes a control unit electrically connected to the first and second conductive contacts and an antenna electrically connected to the control unit. The wireless transponder unit is configured to sense a voltage difference between the first and second conductive contacts, to generate information based on the voltage difference, and to output the information to a wireless reader unit via the antenna.

Abstract: 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 current or voltage in the electrical circuit. A processor connected to the sensor receives sensor data corresponding to the current or voltage in the circuit. The processor is configured to determine a location of a loose connection in the electrical circuit based on the current or voltage data and a switching sequence of the plurality of switches.

Abstract: A method is provided for current-based detection of an electrical fault in an electrical network of a motor vehicle, the network having at least: one battery, one pulse-controlled inverter, one d.c. voltage converter, and an intermediate circuit associated with the pulse-controlled inverter. The method includes: detecting magnitudes of each a battery current, a d.c. voltage converter current, and an intermediate circuit current; comparing current magnitudes according to provided equations; and checking based on the comparison of whether a specifiable deviation has been exceeded. An alternative method for voltage-based detection of an electrical fault in an electrical network of a motor vehicle includes: detecting magnitudes of each a battery voltage, a d.c. voltage converter voltage, and an intermediate circuit voltage; comparing voltage magnitudes according to provided equations; and checking based on the comparison of whether a specifiable deviation has been exceeded.

Abstract: A battery system for vehicle comprises a battery unit that is constituted with a plurality of serially connected cell groups each include a plurality of serially connected battery cells, integrated circuits that are each disposed in correspondence to one of the cell groups of the battery unit and each measure terminal voltages at the battery cells in the corresponding cell group, and a signal transmission path through which one of the integrated circuits is connected to another one of the integrated circuits or to a circuit other than that of the integrated circuits.

Abstract: A fuel injection control apparatus includes a low-side driver, arranged electrically downstream of an injector and operable to drive the injector with a changeover of an ON-OFF state thereof in response to a drive signal from a CPU; a high-side driver, arranged electrically upstream of the injector and downstream of a power source, and having an ON-OFF state thereof which may be changed in response to the drive signal from the CPU; a high-side return signal detection unit and a low-side return signal detection unit. Each of the low-side and high-side drivers includes a transistor arranged inside an ECU. The CPU diagnoses a function of a drive circuit based on the presence or non-presence of return signals received from the high-side return signal detection unit and the low-side return signal detection unit with respect to predetermined driving states of both the low-side and high-side drivers.

Abstract: The present invention is a finger voltage sensor that includes a base finger ring worn by a user that works near an electrical source, an electricity sensor disposed on the base finger ring, the electricity sensor detects one or more electrical fields associated with the electrical source and a warning light disposed on the base finger ring, the warning light emits a constant light when the electricity sensor is activated and is in communication with the electricity sensor. The finger voltage sensor can also include a beeper instead of a warning light and a base finger ring that includes a hook and loop fastener that is releasably attached to a user's finger.

Abstract: An alarm system for alarming whenever there is a power leakage from an electronic device, includes a voltage decreasing circuit, a switch circuit and an alarm circuit. The voltage decreasing circuit receives a first voltage from a live wire output terminal and outputs a second voltage. The switch circuit outputs a control signal when the power leakage is detected. The switch circuit is electrically connected to a connection port. The connection port is electrically connected to the live wire output terminal and a neutral wire output terminal. The alarm circuit receives the control signal and alarms. If there is power leakage from the electronic device, the first voltage from the live wire input terminal flows into the ground wire input terminal via the electronic device; the switch circuit turns on and the alarm circuit is closed to alarm.

Abstract: A branch circuit monitoring system (BCMS) for monitoring branch circuit currents in one or more electrical circuit panels is described. The system is comprised of a data center server, one or more panel processors, each with one or more collection devices, and one or more current sensors per collection device. The BCMS is designed to be installed entirely inside the panel without the need for a dedicated enclosure or power supply to facilitate ease of installation and low-cost. The BCMS also allows for future upgradability through standard software updates so that the system can be updated or patched easily. The BCMS data center server collects, aggregates, stores, and serves historical branch circuit current data from the panel processors to networked users via a web server to provide visualization of data such as tables, charts, and gauges.

Abstract: 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 subsystems. For insulation fault location, a differential current measuring device, a test signal generator and a blocking device are arranged in each subsystem. The insulation monitoring device additionally comprises a selective decoupling device arranged in each subsystem. Furthermore, the invention relates to a method for determining a cross impedance between two subsystems on the basis of the insulation monitoring system according to the invention.

Abstract: A noise current passing through a substrate on which an electronic component is mounted is suppressed in a housing, to provide a malfunction of an electronic device. A substrate (103) on which an electronic component is mounted is secured to a housing (102) by a metal spacer (108) and a screw (104). A noise control member (100) mainly composed of an insulation substance is disposed between the metal spacer (108) and the substrate (103). A first conductive film is formed on the metal spacer-side of the noise control member (100), and a second conductive film is formed on the substrate-side of the noise control member (100). A resistance member (101) is disposed between the first conductive film and the second conductive film. A noise current introduced from the housing to the substrate can be suppressed by the resistance member.

Abstract: A method and an apparatus for detecting an earth fault on a three-phase electric line are provided. The apparatus includes means for determining a neutral admittance on the basis of a residual current and a residual voltage, means for comparing the determined neutral admittance to a predetermined operation characteristic to detect an earth fault on the three-phase electric line, and means for determining one or more harmonic components of the residual current and one or more harmonic components of the residual voltage. The harmonic components have frequencies n*fn such that n?2 and fn is a fundamental frequency. The means for determining a neutral admittance are configured to use at least one of the determined one or more harmonic components of the residual current and at least one of the determined one or more harmonic components of the residual voltage for determining the neutral admittance.

Abstract: 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 electric conductor. The auxiliary unit comprises a current sensor for measuring the intensity of the current flowing in the electric conductor and a first detection means for detecting the voltage outage load-side from the circuit breaker. The method comprises the following steps: measuring the intensity of the current flowing in the electric conductor, detecting the voltage outage load-side from the electric circuit breaker, determining a cause of the detected voltage outage load-side from the circuit breaker, said cause being selected from the group consisting in: an electric overload, a short-circuit and a voltage drop.

Abstract: Various embodiments provide systems and methods for controlling sub-system components during power disturbance events. More particularly, various embodiments provide systems and methods for preventing a controller (215) within a sub-system from turning OFF a switching device (220) during power disturbance events related to other sub-systems.

Abstract: An inverter device for feeding electrical energy from a DC-power source into a power grid includes a pair of bus lines to be connected to the DC-power source; a plurality of capacitors connected in series between the bus lines; a surveying topology surveying an integrity of the plurality of capacitors, and to provide a signal indicating a loss of integrity of one capacitor of the plurality of capacitors; a voltmeter measuring a voltage drop over the plurality of capacitors; a DC/AC-inverter; and a controller. in case of the signal indicating a loss of integrity of one capacitor of the plurality of capacitors, the controller compares the voltage drop over the plurality of capacitors to a lost integrity threshold voltage value, and reduces a current load to the plurality of capacitors by reducing the power uptake of the DC/AC-inverter, when the voltage drop exceeds the lost integrity threshold voltage value.

Abstract: An assembly and circuit structure for measuring current through an integrated circuit (IC) module device is disclosed. The circuit structure includes a power supply, at least one IC module device, at least one amplifier, and a resistive washer. The power supply can be configured to generate direct or alternating current. The at least one IC module device having a pair of terminals can be configured to receive the generated current. The at least one amplifier can be configured to measure the amount of current that flows through the IC module device. The at least one amplifier may be electrically coupled to a resistor. Also, a resistive washer may be configured to oppose current flow through the at least one IC module so as to redirect current to flow through the resistor.

Abstract: A circuit for exciting at least one DC sensor is provided in which the circuit has a digital regulation controller connected to a main system and to a regulation loop. The main system has a DAC connected to the sensor via a non-inverted amplified path and via an inverted amplified path in order to send sensor excitation signals including a DC component in differential mode. The regulation system includes an ADC connected to the amplified paths. The circuit includes a monitoring system that is connected to the controller in parallel with the converter in order to send signals as a function of an AC component of the signals taken from the amplified paths. The digital controller is arranged to inject a sinewave in common mode into the excitation signals and to analyze signals output by the monitoring system and signals output by the ADC.

Abstract: A device for detecting a fault attack, including: a circuit for detecting an interruption of a power supply; a circuit for comparing the duration of said interruption with a first threshold; and a counter of the number of successive interruptions of the power supply having a duration which does not exceed the first threshold.

Abstract: A current differential protection system for a multi-terminal power line includes a current sensor for sensing a current at a local terminal, a controller for time synchronizing the local terminal and remote terminals, and a fault detection module to detect a fault in the multi-terminal power line if a differential current exceeds a threshold value. The controller includes a time measurement exchange module for exchanging time stamp data with remote terminals, an upper range clock for exchanging time stamp data with remote terminals and a lower range clock for indexing the current at the local terminal. A first time period of the upper range clock is N times a second time period of the lower range clock where N is a number of multi-terminals. The controller includes a clock offset calculation module for determining an average time offset based on time stamp data from remote terminals and the local terminal.

Abstract: A system and method for detecting excess voltage drop (EVD) in a three-phase electrical distribution circuit includes a diagnostic system comprising a processor that is programmed to receive three-phase voltages and currents provided to terminals of the electrical machine, determine fundamental components of the three-phase voltages and currents provided to the terminals, and compute positive, negative, and zero sequence currents from the fundamental components.

Abstract: 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 located on the distribution network, for sensing current and dividing the distribution network into at least two regions. The fault location evaluation apparatus includes a fault region determination unit for determining which one of the at least two regions is a fault region where a fault occurs therein by calculating the sensed current from the at least one sensor.

Abstract: A method for detecting a fault of an operating switch connected to an evaluating unit by at least one signal. The switch having at least a first switch circuit for initiating a vehicle function. A signal that specifies the switch position is sensed by the evaluating unit. The first switch circuit is connected to a first potential of the vehicle electrical system and to the signal line to form a first contact branch. The first switch circuit is bridged by a diode device in the non-conducting direction with respect to the first potential, the evaluating unit generates a test voltage, which is greater than the first potential, the test voltage is applied to the signal line, and, the potential being applied to the signal line of the first contact branch is evaluated by means of the evaluating unit in order to detect a fault.

Abstract: A resistor element that is coupled between each of voltage measurement points of a measurement object and a voltage measurement circuit is further coupled to a path of a constant current between a power supply side constant current circuit and a ground side constant current circuit. By controlling the operation of the power supply side constant current circuit and the ground side constant current circuit with a control circuit, the control circuit switches the switch circuit on and off to prevent a voltage drop due to an electric current that turns on the switch circuit.

Abstract: A device for measuring electrical current, voltage and temperature in a conductor made of rigid material is disclosed. The conductor is formed from two conductor sections, between which an electrical resistor element is provided that is made of a material having greater resistance than the material of the conductor sections. In the region of the resistor element, a flattened area with a depression is provided, over which a measuring arrangement, through which a portion of the current flowing through the conductor flows, is placed in the manner of a bridge. In the measuring arrangement is arranged in the vicinity of a contact piece by means of which the conductor can be connected in an electrically conducting manner to another conductor such that the heat generated at the contact point is measured.

Abstract: An equivalent power method for reducing the effects of voltage variation during at least one active material actuation event, includes determining an applied real output based on the ideal voltage of a voltage source, the corresponding ideal output of a controller, and a measured real voltage, and for providing voltage out of bounds compensation, by further determining a difference based on the maximum available power output of the controller during said at least one event, and applying the difference to determine the applied real output during subsequent event(s).

Abstract: A first integrated circuit includes a first voltage output circuit for outputting a voltage, which proportionally increases in correspondence to an angular position of a throttle valve, a first protective resistor, a first output terminal connected to the first protective resistor, and a first abnormality detection circuit for outputting a first abnormality detection signal based on a voltage produced by the first protective resistor. A second integrated circuit is configured similarly to the first integrated circuit by a second voltage output circuit, a second protective resistor, a second output terminal, and a second abnormality detection circuit.