An electronic power connector including a contact configured to electrically connect a power supply to a load. The electronic power connector further including a contact core configured to receive the contact, the contact core including a transformer winding wrapped around the contact core, the transformer winding configured to sense a current.

Provided is a reactor including a coil that has wound portions formed by winding a winding wire, and a magnetic core that includes inner core portions arranged inside of the wound portions and outer core portions arranged outside of the wound portions. The reactor includes an outer resin portion covering at least outer surfaces of the outer core portions. A terminal platform is formed in one piece protruding on the outer surface of an outer resin portion among the outer resin portions and has fastening portions configured to fasten terminal fittings connected to end portions of the winding wire to terminals of an external wiring. A fixing portion is formed in one piece on the terminal platform and fixes the reactor to an installation target. The terminal platform and the fixing portion are integrated and the thickness of the terminal platform is less than that of the fixing portion.

A distribution transformer system includes a distribution transformer and a distribution transformer monitoring (DTM) device secured to the transformer. The DTM device includes multiple sensors, a controller, and a communication interface. The sensors are configured to monitor physical properties of the distribution transformer. Each of the sensors outputs respective sensor data representative of at least one monitored physical property of the distribution transformer. The controller is configured to receive the respective sensor data from each sensor to produce received sensor data. The communications interface is in communication with the controller and configured to communicate the received sensor data to a remote system for use in determining operational parameters of the distribution transformer. In one embodiment, the distribution transformer system further includes a surge arrester associated with the distribution transformer and the DTM device includes a surge arrester sensor configured to monitor the surge arrester and output surge arrester sensor data.

Disclosed are a defect monitoring apparatus and detection method for a transformer oil conservator based on edge computing. The monitoring apparatus includes: a sensing terminal, an edge intelligent gateway, a monitoring terminal, an oil conservator defect monitoring cloud platform, and a client terminal. The edge intelligent gateway and the monitoring terminal are both disposed in a substation. The monitoring terminal is configured to access the edge intelligent gateway. The sensing terminal includes: an airflow sensor, an oil temperature sensor, an ambient temperature sensor, and a microwave oil level measurement assembly. The sensing terminal sends detection data information to the edge intelligent gateway, and the edge intelligent gateway stores and determines a category of the detection data information. The present disclosure can recognize capsule damage, partial blockage of a breathing circuit, leakage in the breathing circuit, moisture impurities in a breathing tube, and false oil level.

A reactor that can measure the temperature of the magnetic core is provided. The reactor includes an assembly having a magnetic core and a coil that has a winding portion, and a temperature sensor that measures the temperature of the reactor. The magnetic core has an inner core portion that is inserted into the winding portion, and a sensor disposition groove is formed in an outer peripheral face of the inner core portion and is disposed inside the winding portion. The temperature sensor is provided inside the sensor disposition groove. According to this configuration, it is possible to precisely measure the temperature of the magnetic core while the reactor is operating.

A cooling fan variable-frequency control system for a power transformer includes a control device and a fan unit. The control device includes a microprocessor that is set with a first temperature range, a second temperature range higher than the first temperature range, and a fan switching time. The microprocessor is connected to a temperature sensor for detecting a temperature of an insulating oil in a power transformer. A variable-frequency controller and a fixed-frequency controller are connected to the microprocessor and are connected to a switching controller. The fan unit is connected to the switching controller and includes first and second fans. The microprocessor controls the switching controller according to the fan switching time to thereby control the variable-frequency controller to connect with the first fan or the second fan. The first fan and the second fan can operate at a fixed frequency and at a variable frequency.

An electromagnetic device comprises an enclosure, at least one winding in the interior of the enclosure, at least one wireless sensor attached to the winding for sensing at least one property or deficiency of the electromagnetic device and at least one active communication unit comprising transceiving circuitry and at least one antenna, wherein the transceiving circuitry is placed on the exterior of the enclosure and the least one antenna is placed inside the enclosure for communication with the at least one sensor, wherein the at least one sensor comprises at least one sensor attached to the winding, and wherein the at least one sensor attached to the winding is a printed electronic sensor comprising electronics printed on an insulating substrate, where the substrate faces the at least one winding.

A wound element made up of a plurality of superposed layers of turns wound on a core, including a sheet of a material that is thermally conductive at least in its plane, which sheet is interposed between two of the superposed layers of turns and has an end projecting from these layers and including at least one temperature probe for delivering temperature information about the wound element.

An electronic power connector including a contact and a contact core. The contact is configured to electrically connect a power supply to a load. The contact core is configured to receive the contact. The contact core includes a transformer winding configured to sense a current and a sensor slot configured to receive a sensor. In some embodiments, the sensor is configured to sense a temperature. In some embodiments, the sensor is configured to sense a voltage.

A power inductor such as a variable voltage converter power inductor having a temperature sensor embedded therein is disclosed. In one or more embodiments, the sensor may be disposed between the core and the coil or winding. The sensor may be positioned in the cavity of a bobbin or the core itself.