A busbar adapter including a housing being adapted to be attached to a busbar, a printed circuit board, and at least one electric current sensor electrically connected with the printed circuit board, wherein the printed circuit board and the at least one electric current sensor are arranged inside the housing, wherein the housing comprises an upper housing part being adapted for the attachment of one or more devices to be connected through the busbar adapter to a busbar and a lower housing part being adapted for holding the printed circuit board and the at least one electric current sensor, and wherein the lower housing part comprises a first part being adapted for holding the printed circuit board and the at least one electric current sensor and a second part being adapted to be attached to the busbar.

The invention relates to a device (D) for detecting a fault in an electrical network (1), comprising at least one electrical quipment (E) which is electrically connected to a first power conductor (C1) and to a second power conductor (C2), the electrical network (1) being provided with a common conductor (Cc). The device comprises a first measuring member (O1) of the common mode voltage present on the power conductors (C1, C2) and a second measuring member (O2) of a current flowing in the power conductors (C1, C2). The device also comprises a calculator (UP) configured to determine over a determined observation period a mixed energy (E.sub.mix) transported in the measurement region from the first variable (V.sub.res) and the second variable (I.sub.net). The invention also relates to an equipment, a localization system and a method for detecting a fault in an electrical network.

An electromagnetic relay diagnostic device includes: an operation detection unit including a first light-emitting unit emitting light when a current flows through a wiring line connected to a coil of an electromagnetic relay; an operation detection unit including a second light-emitting unit emitting light when a current stops flowing through the wiring line; an operation detection unit including a third light-emitting unit emitting light when detecting a change in conductive state of a wiring line connected to a contact of the electromagnetic relay; an operation detection unit including a fourth light-emitting unit emitting light when detecting that the change in conductive state of the wiring line has disappeared; an imaging unit capturing a moving image of the operation detection units; and a diagnostic unit calculating a contact-on operation time and a contact-off operation time using the moving image, and diagnosing whether an abnormality has occurred in the electromagnetic relay.

Current measurement devices for printed circuit board mounting are disclosed herein. The current measurement devices include a hollow and flexible core to improve response to a primary signal and decrease weight. The current measurement device includes a housing with guides to maintain alignment of the core. An electromagnetic shield may be placed between the circumference of the core and the housing. The housing may include apertures to facilitate washing. The current measurement device may include a primary conductor external to the housing.

An electronic module has an electronic element 210; a connection body 250 provided on a front face of the electronic element 210; and a detection part 100 having a winding wire part 10 provided so as to surround the connection body 250, and a winding return wire part 50 connected to a terminal end part of the winding wire part 10 and returns from the terminal end part toward a starting end part.

An integrator for use with a current sensor provides a feedback loop reducing drift while maintaining wide bandwidth.

The disclosure relates to a method for determination of an operating state of a compressor and/or a rotational speed of a compressor drive of the compressor comprising; measuring, over a time range, a magnetic field associated with one or more phases of an electrical power supply conductor supplying the compressor with electrical power; wherein the magnetic field is measured by a detection element to provide a representation of the magnetic field; determining a frequency spectrum of the representation of the magnetic field over the time range; and analyzing the frequency spectrum of the representation of the magnetic field over the time range to determine an operating state of the compressor and/or to determine a rotational speed of the compressor drive. The disclosure further relates to a device for carrying out the method, a compressor measuring system, and a computer-readable storage medium.

According to one embodiment, a sensor includes a base, and a first structure body. The base includes semiconductor dement including the first dement electrode. The first structure body includes a first conductive member and a coil. The first conductive member is electrically connected with the first element electrode. The coil is provided around the first conductive member in a first plane crossing a first direction from the base to the first structure body.

Electrical current and/or voltage monitoring powered by induction and/or conductive spike, and related devices, apparatuses, systems, and methods are disclosed. An electricity monitoring device can include a measuring conductor electrically coupled to a monitored energy source to detect/read voltage of the monitored energy source. The electricity monitoring device can include an electrical component in which a fluctuating magnetic field is induced from a fluctuating flow of electrical current in the monitored energy source, the fluctuating magnetic field to produce an electromotive force to provide electrical energy. The electricity monitoring device can include a controller that can further include processing circuitry to be powered by the provided electrical energy, the controller coupled to the measuring conductor to determine a present run-time electrical voltage of the monitored energy source based on a reading of the measuring conductor. In some embodiments, the electrical component can be a Rogowski coil.

The application provides a closed loop current transformer, in which a hall element is positioned in a notch of a magnetic ring and is used for generating an induced voltage according to the magnetic field generated in the magnetic ring by current to be measured. A first compensating coil and a second compensating coil are wound on opposite sides of the magnetic ring in the same winding direction. An input end of the power amplifier circuit is connected with an output end of the hall element, and an output end is connected with the first compensating coil and the second compensating coil respectively. The other ends of the first compensating coil and the second compensating coil are respectively connected with a signal detection circuit, and an output end of the signal detection circuit is used as an output end of the closed loop current transform.