Abstract: The present invention relates to apparatuses and methods for measuring electrical currents. A measurement circuit is electrically separated from a primary conductor through which the current to be measured flows. An indirect coupling between the primary conductor and the measurement circuit is achieved by magnetic coupling. The magnetic field created by the current is detected by a magnetic field sensor, which forms part of the measurement circuit. To avoid unwanted capacitive coupling, according to at least some embodiments, an electrical shield is placed between the primary conductor and the measurement circuit. In some embodiments, a differential magnetic field sensor is placed in proximity to two opposite segments of the primary conductors to achieve differential sensing. The disclosed circuits are particularly useful in the design and manufacturing of highly integrated sensors, such as a sensors integrated into a single chip package, and can be used for PWM controlled currents.

Abstract: Magnetic sensor arrangement comprising a component board delimited by two opposing main surfaces and having an accommodation hole for accommodating at least part of a magnetic field generating structure, and a magnetic sensor package located at least partially between the two opposing main surfaces and configured for sensing a magnetic field generated by the magnetic field generating structure.

Abstract: An electrical cable analysis method includes providing an electrical cable comprising an elongated metallic element and a cable core, the cable core comprising an electrical conductor. The method includes connecting an electrical generator to an electrical circuit including the elongated metallic element, generating, by the electrical generator, a flow of an electrical current along the electrical circuit, detecting a magnetic field associated with the flow of the electrical current in the electrical cable, measuring at least one value relating to the magnetic field along a cable length of the electrical cable, and analyzing the measured at least one value to obtain information about at least one structural aspect of the electrical cable.

Abstract: According to one embodiment, a magnetic sensor includes a first conductive part circuit, an alternating current circuit part, a first direct current circuit part, and a first element. The first conductive part circuit includes a first conductive part including a first conductive part end portion and a first conductive part other-end portion, and a first alternating current transfer element electrically connected in series with the first conductive part. The first conductive part circuit includes a first circuit end portion and a first circuit other-end portion. The alternating current circuit part is configured to apply an alternating current voltage between the first circuit end portion and the first circuit other-end portion. The first direct current circuit part is configured to apply a first direct current voltage to the first conductive part end portion and the first conductive part other-end portion. The first element includes a first magnetic layer.

Abstract: A tester for a relay comprises an enclosure, a testing circuit that includes a controller, electronic switch components, a power source, indicator LEDs, a test start switch, a relay selector switch, and five electric leads each connected with one terminal of the relay. With the relay selector switch toggled to indicate the type of relay being tested, with power supplied to each lead, and with the test start switch actuated, the controller sets each lead to ground, in turn, and then count the number of other leads that are grounded as a result. The controller then illuminates the at least one indicator to indicate either the passing relay test or the failed relay test based on the counts measured. Once the leads connected to the relay coil are identified, cyclic testing of the relay can be performed.

Abstract: A method and system of assessing a condition of a boiler is disclosed. The assessing of the condition of the boiler establishes a baseline resistivity of a boiler waterwall for a first location of the boiler waterwall under a known temperature condition. A resistivity of the first location is measured under another temperature condition. The measured resistivity for the first location is compared to the baseline resistivity. A condition of the waterwall of the boiler is determined based on the comparison.

Abstract: The present invention relates to a current-sensor structure comprising a conductor for conducting electrical current in a current direction. The conductor has one or more conductor surfaces. At least one current sensor is disposed on, over, adjacent to or in contact with the conductor and is offset from a centre of the conductor in an offset direction orthogonal to the current direction and optionally parallel to a conductor surface. The current-sensor structure can comprise a substrate on which the conductor is disposed. The current sensor can be located on a side of the conductor opposite or orthogonal to a surface of the substrate. The current sensor can be aligned with, near to or adjacent to an edge of the conductor. The current-sensor structure can comprise a shield, such as a U-shaped laminated shield that at least partially surrounds the conductor and the current sensor.

Abstract: A current-sensor structure comprises a conductor for conducting electrical current in a current direction. The conductor has one or more conductor surfaces and an edge. At least one current sensor is disposed on, over, adjacent to or in contact with the conductor and is offset from a centre of the conductor in an offset direction orthogonal to the current direction. The current sensor is aligned with the edge of the conductor or the conductor has a width W and the current sensor is within a distance of W/2.5, W/3, W/4, W/5 or W/6 of the conductor edge. The current-sensor structure can comprise a substrate on which the conductor is disposed.

Abstract: Systems for identifying a meter that is out of calibration and methods of controlling the same include obtaining a power measurement value for each of a plurality of metering devices in a hierarchy of metering devices, calculating virtual metering points for a candidate metering device using metering devices connected upstream and/or downstream to the candidate metering device, and identifying the candidate metering device as being out of calibration by leveraging the virtual metering points and the candidate metering device's specification.

Abstract: The invention relates to an optical insulation monitoring device for power cables, having at least one optical waveguide for transmitting an optical signal integrated into a polymer film. The polymer film is arranged in such a way that the radially outer surface of the cable is surrounded by the polymer film in at least one longitudinal portion of the cable. At least some of the optical waveguides can be designed as multimode waveguides. The optical waveguides may be integrated in a plurality of layers in the polymer film, the optical waveguides of a first layer being arranged in staggered fashion with respect to the optical waveguides of a second layer arranged above or below the first layer. In this way, at least a section of the polymer film in the film plane is completely covered by the optical waveguides without any unwanted crosstalk between adjacent optical waveguides resulting.

Abstract: The technology provides for an extension member configured to direct a magnetic field from a magnet to a Hall Effect sensor to facilitate detection of magnetic field. By varying the dimensions of the extension member, which may be any arbitrary shape, the relative positions of the magnet and the Hall Effect sensor may be less constrained by the reach of the magnetic field of the magnet, thereby allowing more design possibilities. The extension member may be used in a case, where the extension member may facilitate detection of whether the case is open or closed, the extension member may further provide magnetic attraction to keep the case closed.

Abstract: A magnetic sensor includes at least one MR element and a coil. The coil includes at least one conductor portion. The at least one conductor portion is each located at a position such that a partial magnetic field generated by the conductor portion is applied to one of the at least one MR element, the one corresponding to the conductor portion, and extends along an imaginary curve curving to protrude in a direction away from the corresponding MR element.

Abstract: A power cable measurement system for facilitating measurements of a power cable terminated at an electrical substation and connected to an overhead busbar, including: a first movable structure provided with a first busbar connector, and a measurement equipment connector device configured to be electrically connected to the first busbar connector and to measurement equipment, wherein the first movable structure is configured to be maneuvered between a default lowered position in which the first busbar connector is disconnected from the overhead busbar, and a temporary elevated position in which the first busbar connector is set in electrical connection with the overhead busbar to provide an electrical connection between the overhead busbar and the measurement equipment connector device.

Abstract: In a voltage detection circuit, if a driving signal is provided from a control circuit to a drive target circuit that is one of a plurality of individual detection circuits, and a non-driving signal is provided from the control circuit to the other non-target circuits, switch portions of the non-target circuits are turned off to prevent a current from flowing through first transistors and second transistors of the non-target circuits, whereby generation of the output voltages in the non-target circuits is stopped, and a switch portion of the drive target circuit is turned on so as to allow a current to flow through a first transistor and a second transistor of the drive target circuit, whereby a voltage according to a voltage across both ends of an electricity storage cell corresponding to the drive target circuit is applied to an output conductive path.

Abstract: A device for simulating intermittent arc grounding faults in a power distribution network includes a sliding rail, a first and a second support frames, an insulated electrode disk, and an electrode disk motor. The first support frame is fixed on the left side of the slide rail, and the position of the second support frame relative to the first support frame can be adjusted through the sliding rail. The second support frame is provided with an electrode disk motor for driving the insulated electrode disk to rotate. An upper and a lower conductive bars are installed on the first support frame, their adjacent ends provided with an upper and a lower arc-shaped conductor sheets, and the insulated electrode disk having two circles of conductive pillars is located between the conductor sheets. The conductor sheets are respectively installed on the side of the conductive bars close to the conductive pillar.

Abstract: There is provided an impedance sensor capable of counting the number of microscopic biological materials and specifying their properties stably with high sensitivity. An impedance sensor includes a measuring electrode pair formed at a wiring layer in a multilayer-wiring circuit board and one or more dielectrophoresis electrodes formed at another wiring layer lower than the wiring layer.

Abstract: This disclosure describes a novel method and apparatus for testing TSVs within a semiconductor device. According to embodiments illustrated and described in the disclosure, a TSV may be tested by stimulating and measuring a response from a first end of a TSV while the second end of the TSV held at ground potential. Multiple TSVs within the semiconductor device may be tested in parallel to reduce the TSV testing time according to the disclosure.

Abstract: A method that is disclosed that includes the operations outlined below. Dies are arranged on a test fixture, and each of the dies includes first antennas and at least one via array, wherein the at least one via array is formed between at least two of the first antennas to separate the first antennas. By the first antennas of the dies, test processes are sequentially performed on an under-test device including second antennas that positionally correspond to the first antennas, according to signal transmissions between the first antennas and the second antennas.

Abstract: A current sensor arrangement includes a first conductor configured to conduct a first portion of a primary current in a current flow direction; a second conductor configured to conduct a second portion of the primary current in the current flow direction; and a magnetic sensor. The first and second conductor are coupled in parallel. The first current produces a first magnetic field as it flows through the first conductor and the second current produces a second magnetic field as it flows through the second conductor. The first conductor and the second conductor are separated from each other in a first direction that is orthogonal to the current flow direction, thereby defining a gap. The magnetic sensor is arranged in the gap such that the first conductor is arranged over a first portion of the magnetic sensor and the second conductor is arranged under a second portion of the magnetic sensor.

Abstract: A method for measuring (and controlling) a characteristic performance parameter ?s of a device under test (DUT) having an input port (at the minimum). The method involves connecting the input port of the DUT to a signal generator, subjecting the DUT to a large signal input test signal, and executing a first measurement of the incident wave and reflected wave at a DUT input reference plane. The method further involves subjecting the DUT to a perturbation signal combined with the large signal input test signal, and executing a second measurement of the incident wave and reflected wave at the DUT input reference plane, and determining the characteristic performance parameter from the first measurement and the second measurement.