A system and method for phase and gain calibration of a current sensor system. The system comprises a microcontroller configured to execute software in an energy measurement component and a calibration computer having a calibration application. The energy measurement component receives first and second digital signals representing current and voltage signals, respectively, received from a test source, and calculates active power and a power factor, and provides those values to the calibration computer. The power factor is converted to a converted phase angle. Based on the information received from the energy measurement component, the calibration application calculates parameters used to update components within the microcontroller to maximize the accuracy of the current sensor system.

A monitoring set-up to detect supply-line faults for a control unit, including at least two internal current-carrying supply lines, which are redundant with respect to each other, are situated inside of the control unit, and are connected electrically, on one end, to external supply lines, respectively, and, on the other end, to a common, internal supply-potential layer of the control unit; a signal detector, which inductively picks up a flow of current through the individual internal supply lines and outputs at least one corresponding measuring signal; and an evaluation and control unit, which evaluates the at least one measuring signal to detect supply-line faults. A method of detecting supply-line faults for a control unit, using such a monitoring set-up, is also described.

An electrical power generating assembly (20) for a wind turbine (1). The electrical power generating assembly comprises a gearbox (22) comprising a gearbox output shaft, a generator (24) comprising a rotor (32) that is coupled to the gearbox output shaft; and a current measuring module (40) located between the gearbox (22) and the generator (24). The current measuring module (40) comprises: an electrical pickup (42) mounted to the electrical power generating assembly (20), wherein the electrical pickup (42) includes an electrical contact (44) that engages with a slip ring (48) associated with the rotor (32). The current measuring module further comprises: a first current measuring device (50) mounted with respect to the electrical pickup (42) to detect current flowing at least through the electrical pickup; and a second current measuring device (52) mounted with respect to the electrical pickup (42) to detect current flowing through at least a component associated with the gearbox output shaft.

A coil wire includes a core wire and a winding wire. The winding wire is wound around a circumference of the core wire so as to form a plurality of spirals. The coil wire satisfies one of: (i) an outer surface of the core wire is exposed, and a distance between the outer surface of the core wire and an inner circumferential surface of part of the winding wire is smaller than a thickness of a first insulating film coated on the winding wire; or (ii) the outer surface of the core wire is coated by a second insulating film, and a distance between an outer surface of the second insulating film and the inner circumferential surface of part of the winding wire is smaller than a thickness of a thicker one of the first insulating film and the second insulating film.

A current sensor includes a first component and a second component shaped to fit together to create a combined unit with multiple openings through the combined unit. The opening is bounded on a first side by the first component and on a second side by the second component. The first component and the second component are configured to be fitted together around current-carrying conductors passing through the openings. The first component includes first portions of an inductive energy harvesting device and a current sensing device, both proximal to the first side of the opening. The second component includes second portions of the inductive energy harvesting device the current sensing device, both proximal to the second side of the opening. The inductive energy harvesting device may include a split-core ferrite current transformer and the current sensing device may include a Rogowski coil.

An apparatus for measuring a flow of current through at least one electrical conductor of an electrotechnical device which is disposed in a cooling channel, wherein a non-conductive cooling medium flows through the cooling channel during operation of the electrotechnical apparatus, the apparatus including a flux conductor which is disposed around the at least one electrical conductor, and an evaluation circuit which is coupled to the flux conductor and is configured to determine the flow of current through the at least one electrical conductor by evaluating an electrical parameter of the flux conductor, wherein at least a part of the flux conductor is disposed in the cooling channel.

A universal measurement input for connecting a small signal transformer to an electrical device includes an electrical input for connecting a connection line of the small signal transformer, an electrical output for outputting a measurement signal to the electrical device, and a correction element having a digital filter with a filter transfer function adapted to the small signal transformer. In order to provide a measurement input with which all possible types of small signal transformers can be connected to an electrical device and which thus reduces the device variety of measurement inputs which are to be provided, the filter transfer function of the correction element is defined by a parameter set to be variably preset specifically for the small signal transformer. An electrical device with the measurement input is also provided.

An electrical power system including an electrical power connector, a contact configured to electrically connect a power supply to a load, a first sensor configured to sense a first characteristic of the electrical power connector, a second sensor configured to sense a second characteristic of the electrical power connector, and an electronic controller. The electronic controller configured to receive a first signal indicative of the first characteristic, receive a second signal indicative of the second characteristic, compare the first signal to a first threshold, compare the second signal to a second threshold, and dynamically adjust at least one selected from a group consisting of the first threshold and the second threshold. Wherein the dynamic adjustment is based on at least one selected from a group consisting of a measured or calculated parameter, an installation condition, an operational limit, a known operational behavior, and parameter threshold information.

The invention relates to a single-phase, equipotential, self-powered recloser with a load life of more than 20 years, for installing in 15 KV medium-voltage networks, directly on Matthews-type fuse bases, using hooksticks, and without requiring the interruption of the energy supply. Said recloser uses a bistable electromagnetic actuator that controls a vacuum bulb for interrupting the current in the event of a fault. It stores energy in ultracapacitor banks which receive the first charge by means of an induction coil.

A system and method for phase and gain calibration of a current sensor system. The system comprises a microcontroller configured to execute software in an energy measurement component and a calibration computer having a calibration application. The energy measurement component receives first and second digital signals representing current and voltage signals, respectively, received from a test source, and calculates active power and a power factor, and provides those values to the calibration computer. The power factor is converted to a converted phase angle. Based on the information received from the energy measurement component, the calibration application calculates parameters used to update components within the microcontroller to maximize the accuracy of the current sensor system.