A method of recognizing partial discharges emitted inside or outside electrical equipment after at least one partial discharge activity has been detected Partial discharge patterns are recorded beforehand in a data base, each pattern being associated with the type of fault that generated it. A new partial discharge (Pd) pattern is acquired. The new partial discharge pattern is compared with discharge patterns that are already recorded in the data base The matching fault in the equipment is obtained by deduction, and the result is recorded in the data base.

An insulated electrical component of an insulated electrical machine includes a conducting element, a first radiographically-visible conductor sensor node coupled to the conducting element, at least one second radiographically-visible conductor sensor node coupled to the conducting element a first distance in a predetermined direction from the first radiographically-visible conductor sensor node, and an insulating material bonded to the conducting element. In some embodiments, the insulated electrical component further includes a first radiographically-visible insulator sensor node coupled to the insulating material and not coupled to the conducting element and at least one second radiographically-visible insulator sensor node coupled to the insulating material and not coupled to the conducting element a second distance from the first radiographically-visible insulator sensor node. The radiographically-visible sensor nodes are distinguishable from the conducting element and the insulating material in a radiographic image. Methods of manufacturing and non-destructive testing of insulated electrical components are also disclosed.

A test apparatus includes an output configured to be coupled to a sense input of an arc quenching device control circuit of an arc quenching system, a user interface, and a control circuit configured to generate a simulated sense signal at the output in response to an input at the user interface, the simulated sense signal representing a physical state associated with a fault condition of a bus coupled to the arc quenching system. The simulated sense signal may be configured to cause the arc quenching device control circuit to trigger an arc quenching device of the arc quenching system. The physical state may include, for example, a voltage condition, a current condition, a temperature, a pressure or a light intensity. In some embodiments, the simulated sense signal may include a current indicative of a current passing through a bus to which the arc quenching system is connected.

Propagating brush discharge testing systems include an initiation electrode, a high-voltage switch, a sensor, and a controller. The initiation electrode has an exposed tip positioned adjacent to a surface of a test article. The high-voltage switch is configured to selectively isolate the initiation electrode from ground potential. The sensor is positioned and configured to detect a propagating brush discharge between the initiation electrode and the test article. The controller is programmed to operate the high-voltage switch to ground the initiation electrode.

A method for distinguishing an arc from a luminous gas at least containing metal vapor includes sensing light in a monitoring region and determining a first intensity I.sub.1 of the sensed light at a first wavelength 1 and a second intensity I.sub.2 of the sensed light at a second, greater wavelength 2. The ratio I.sub.1/I.sub.2 between the first intensity I.sub.1 and the second intensity I.sub.2 is determined. The sensed light is associated with an arc if said ratio I.sub.1/I.sub.2 is greater than a specifiable first threshold value and/or with a luminous gas at least containing metal vapor if said ratio I.sub.1/I.sub.2 is less than a specifiable second threshold value.

A testing apparatus for testing electrical components and/or conductor track structures. The testing apparatus includes: a multiplicity of testing locations, each receiving an electrical component and/or a conductor track structure; a selection device for selecting one of the testing locations; electrical lines disposed in rows and electrical lines disposed in columns for the supply of an alternating voltage to the component or structure, situated at the selected testing location; Z diodes for the electrical connection of the respective component and/or structure at the respective testing location via one of the Z diodes to one of the rows of electrical lines; a signal generator developed to generate a test signal that has a voltage signal as the sum of a square wave signal and a wave-shaped signal; and an electromigration device for applying a direct voltage signal to the components and/or structures to bring about electromigration in the components and/or structures.

An arrangement having an electric cable, at least one fiber at least a part of which being aligned along and motionally coupled with the electric cable, and a device for detecting effects in the electric cable via said at least one fiber.

Systems, methods, and devices of the various embodiments may enable the detection and localization of power line corona discharges and/or electrical arcs by an unmanned aerial vehicle (UAV) including an ultraviolet (UV) sensor and a reflective parabolic dish. In various embodiments, the UV sensor may use the photoelectric effect to sense narrow-band UV photons in a Geiger-Mueller tube and circuit configuration. In various embodiments, the reflective parabolic dish may be fixed relative to the UV sensor and include a reflective concave surface. The reflective concave surface may be configured to reflect narrow-band UV photons toward the UV sensor.

Propagating brush discharge testing systems include an initiation electrode, a high-voltage switch, a sensor, and a controller. The initiation electrode has an exposed tip positioned adjacent to a surface of a test article. The high-voltage switch is configured to selectively isolate the initiation electrode from ground potential. The sensor is positioned and configured to detect a propagating brush discharge between the initiation electrode and the test article. The controller is programmed to operate the high-voltage switch to ground the initiation electrode.

A method for performing preventive examination and maintenance on electrical equipment is disclosed. The method includes training a machine learned model with a database on a server; collecting data for electrical equipment using a plurality of detectors comprising an ultrasound detector, a thermal detector, and a current transformer; analyzing the collected data with the trained machine learned model on the server; outputting results that indicate whether an electrical failure is detected or predicted based on the analysis; and classifying and displaying the results on a device.