A current transformer (10) includes a magnetic core, a first primary-side winding, a second primary-side winding, and a first secondary-side winding. The magnetic core includes a first magnetic core structure, a second magnetic core structure, and a third magnetic core structure. The first magnetic core structure is connected to the second magnetic core structure to constitute a first closed magnetic circuit, the first magnetic core structure is connected to the third magnetic core structure to constitute a second closed magnetic circuit, and the first magnetic core structure is a magnetic core structure common to the first closed magnetic circuit and the second closed magnetic circuit.

A current detection device is configured by a current path through which a first current flows, a current path through which a second current flows, a switching element that switches the current paths and allows the first current and the second current to flow alternately, a common coil section through which an induction current flows by the first current and the second current, and a turn current path that alternates a first induction current flowing through the coil section by the first current and a second induction current flowing through the coil section by the second current.

A current sensor is configured to detect a current flowing through an electrical conductor. The current sensor includes a core and a coil wound around the core. The core has a hollow configure to allow the electrical conductor to pass through the hollow. The core substantially has a C-shape haying a gap connected to the hollow. At least a part of the gap of the core is located inside the coil. This current sensor suppresses the influence of external noise.

The present invention relates to a system for generating a direct current power output from an alternating current (103) in a primary wire (3), wherein the system comprises: at least one core (104) configured to be located around the primary wire (3); at least one secondary winding (22, 24) arranged around the at least one core (104), wherein each winding (22, 24), together with the at least one core (104) and the primary wire (3), forms a current transformer unit, and wherein each secondary winding (22, 24) has a first end and a second end; for each secondary winding (22, 24), a rectifier (10), wherein each rectifier (10) is configured to convert an alternating current to a direct current, and wherein each rectifier (10) comprises two AC connections for alternating current and two DC connections for direct current, wherein the first end and the second end of the secondary winding (22, 24) are connected to the AC connections of the rectifier (10); for each secondary winding (22, 24), a shunting unit arranged and configured to short the ends of the secondary winding (22, 24); and a load element (6), wherein the load element (6) is connected to a DC connection of each rectifier (10). The present invention also relates to a corresponding use.

A current converter with fluid or oil paper insulation for high voltage, with a head housing through which a primary conductor passes. A measurement device through which the primary conductor passes is arranged in the head housing. The primary conductor includes two different primary conductor types, more specifically an outer tube primary conductor as the first type and one or more inner conductor primary conductors as the second type. The outer tube primary conductor surrounds an interior that is designed to receive the inner conductor primary conductor, and the inner conductor primary conductors can be inserted into the interior. The outer tube primary conductor is used to transmit power and creates an encasement for the inner conductors. Only the outer tube primary conductor needs to be sealed with respect to the head housing. Inner conductors therefore can be easily inserted or re-moved subsequently, without the need for sealing measures.

A current sensor is configured to detect a current flowing through an electrical conductor. The current sensor includes a core and a coil wound around the core. The core has a hollow configure to allow the electrical conductor to pass through the hollow. The core substantially has a C-shape haying a gap connected to the hollow. At least a part of the gap of the core is located inside the coil. This current sensor suppresses the influence of external noise.

A GFCI includes a current sensor system providing a current sensor signal indicating a leakage current of the AC power system. A magnitude detector is configured to provide a first channel signal indicating an RMS value of the current sensor signal. A reference signal generator is configured to provide a second channel signal indicating a trip reference value responsive to a frequency of the current sensor signal. A fault detector is configured to provide a fault trip signal indicating ground fault condition of the AC power system in response to the first channel signal and the second channel signal. A circuit breaker mechanism is configured to open a circuit of the AC power system in response to the fault trip signal.

An electric current transformer including a first coil and a second coil, which are produced with a first printed circuit including a first positioning device, and a second positioning device; and a first magnetic part including a first holding device and a second magnetic part including a second holding device, the positioning device being arranged to join together with the holding device so as to hold reference faces of the magnetic parts a predetermined distance away from the turns of the first and second coils. A current measurement unit includes such a current transformer.

The present disclosure relates to an electrostatic shield for providing electrostatic shielding for a current sensing coil. Current sensing coils are configured to enable the measurement of a current carried by an electrical conductor passing through a core of the current sensing coil. The electrostatic shield of the present disclosure is configured to provide electrostatic shielding to a core of the current sensing coil in order to reduce or eliminate electrostatic coupling between the electrical conductor and the current sensing coil, thereby improving the accuracy of current measurement that may be achieved by the current sensing coil.

A current-sensing system includes a conductor for carrying a first electrical current generating a first magnetic field. A device, spaced from the conductor by a clearance, includes a semiconductor integrated circuit die in a package. The semiconductor integrated circuit die includes at least one elongated bar of a first ferromagnetic material magnetized by the first magnetic field; a sensor comprising a first coil wrapped around the at least one elongated bar to sense the bar's magnetization; and an electronic driver creating a second electrical current flowing through a second coil wrapped around the at least one elongated bar generating a second magnetic field to compensate the at least one bar's magnetization. The package has a first outer surface free of device terminals. A discrete plate of a second ferromagnetic material is positioned in the clearance and is conformal with the first outer surface of the package.