The present disclosure provides an improved Rogowski-type current sensor. In order to allow the sensing coil and the compensation wire to overlap, the sensor is produced using two boards. The current sensing coil is provided on one board, and the compensation wire is provided on another board. The coil and the wire are arranged such that they at least partially overlap, and ideally the compensation wire is formed entirely within the area defined by the coil, albeit in a different plane. This arrangement makes the current sensor far better at rejecting interference than prior art PCB arrangements. In addition, the coil may be formed on a two-sided board. The board has upper radial elements formed on an upper surface, and lower radial elements formed on lower surface. The radial elements are connected using vias formed in the board. The upper radial elements are arranged in a first plane, and the lower radial elements are formed in a second parallel plane. The upper radial elements are arranged so that they are aligned with the lower radial elements, such that a pair of radial elements form a radial plane that is perpendicular to the board surface. This symmetry ensures excellent sensitivity to currents in a conductor.

According to one embodiment, a semiconductor device 1 includes an Si substrate 11, an inductor 12 formed in wiring layers disposed above the Si substrate 11, and a shield 13 formed so as to surround the inductor 12, in which the shield 13 includes metals 105 to 109 formed in, among the wiring layers, a layer in which the inductor 12 is formed and a layer above that layer, and a silicide 104 formed between the Si substrate 11 and the wiring layers above the Si substrate 11.

An apparatus includes: a plurality of separable load break devices, each separable load break device including: a resettable current interruption device associated with operating states, the operating states including at least a first operating state that prevents current flow in the resettable current interruption device and a second operating state that allows current flow in the resettable current interruption device; a switch control configured to control the operating state of the resettable current interruption device; a connection interface configured to mechanically connect the load break device to a separate electrical device and to electrically connect the resettable current interruption device to the separate electrical device; and an electrical interface configured to electrically connect the resettable current interruption device to a load. The apparatus also includes a control system configured to provide electrically ganged operation of the plurality of load break devices.

Signal transducers in electrical communication with shorted leads of current transformers are used to provide monitoring and protection functions to an electric power delivery system. Differential protection is performed by comparing a predetermined threshold against a voltage signal from series-connected leads of signal transducers in electrical communication with shorted leads of current transformers. The signal transducers may be Rogowski coils. Signal transducers in communication with shorted leads may be used to improve safety and increase performance of the current transformers by decreasing susceptibility to saturation.

A wire wound resistor arrangement including a plurality of wire wound resistors electrically connected in a series connection, a first terminal disposed at a first end of the series connection of wire wound resistors, and a second terminal disposed at a second end of the series connection of wire wound resistors. The wire wound resistors are arranged in a polygonal shape having at least three vertices the first terminal and the second terminal are disposed at one of the vertices.

A sensor, for measuring current in a conductor, has a stack with at least one isolation layer and at least two metallization layers stacked in a z direction, a first winding of conductive material and a second winding of conductive material, the first and second winding each having first and second parts formed in a metallization layer in the stack and mainly extending respectively in y and z directions and respectively having first and second centers of gravity. The first and second centers of gravity are respectively in first and second planes, wherein the first plane intersects with the second plane in a common intersection line in the second direction. The z direction and the y direction are orthogonal. The sensor has measurer configured to measure current through the first and second winding.

A current sensor includes a current sense coil disposed about a conductive lead, the current sense coil configured to sense a current passing through the conductive lead. The current sense coil includes: a first outer coil configured to detect a first magnetic field generated by the current; a second outer coil configured to detect the first magnetic field, the second outer coil further configured to cancel an electrical field induced in the first outer coil; and an inner conductor disposed between the first outer coil and the second outer coil, the inner conductor configured to detect a second magnetic field generated by the current.

The present invention relates to a busbar adapter for connection to a polyphase busbar system, wherein the busbar adapter comprises a top covering element and a bottom covering element, contact devices and contact lines. The busbar adapter also comprises a current measuring device which is designed such that current measurement can be carried out for each phase of the busbar adapter in the busbar adapter.

An electrical activity sensor attachable to a power cable of an electrical device for detecting an impulse generated in the power cable in response to a change in electrical power state of the electrical device is described. The electrical activity sensor has an antenna assembly including an antenna element operable to magnetically couple with an electrical pulse generated in the power cable, to induce an electrical signal, in response to a change in electrical power state of the electrical device and to wirelessly transmit data representative of the electrical power state change of the electrical device to a remote reader device. The antenna element is a helical shape dipole having at least one turn arranged, in use, around the power cable.

The invention is about a current transducer of the Rogowski type, with a primary conductor winding having a first number of loops (N1) for carrying the rated current (I.sub.R) to be measured, with a secondary conductor winding having a pair of second terminals and a helical shape and a second number of loops (N2), said secondary conductor winding encircling the primary conductor in a toroidal manner, whereby a rated current voltage signal V.sub.S is induced between the pair of second terminals of the secondary winding, said rated current voltage signal being characteristic for the derivative of the rated current (dI.sub.R/dt), with a transducer electronics (IED) configured to receive the rated current voltage signal (V.sub.S), characterized in that the current transducer comprises a third conductor winding having a pair of third terminals with a third number of loops (N3), whereby the transducer electronics (IED) is configured to feed a calibration current signal (I.sub.Cal) into the third conductor winding, whereby in response to the derivative of the calibration current signal (dl-.sub.Cal/dt) an additional calibration signal (V.sub.cal) is created between the pair of second terminals of the second winding and whereby the transducer electronics (IED) is configured to process the rated current voltage signal (V.sub.S) and the calibration signal (V.sub.cal) to derive a corrected voltage signal (V.sub.S,corrected) with a calibrated sensitivity S.sub.cal.