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.

The invention relates to a method, a device (10) and an arrangement (1) for monitoring alternating current electric apparatuses (3), like e.g. power distribution transformers. The inventive method relies on an inductor antenna (11, 11′) suitable to detect the electromagnetic field at the frequency of the alternating current the apparatus (3) to be monitored is supplied with arranged in the vicinity of but distant to the apparatus (3) to be monitored and comprises the steps: —Detecting the electromagnetic field radiated by the electric apparatus (3) to be monitored; —Digitizing the detected electromagnetic field to obtain EMF-data; —Running a Fast-Fourier-Transformation on the digitized EMF-data to obtain FFT-transformed data; and—Monitoring the magnitudes of the FFT-transformed data at least at the frequency of the alternating current the apparatus (3) to be monitored is supplied with and its third harmonic for anomalies. The inventive device (10) and arrangement (1) are configured to perform the inventive method.

Provided are an electrical tree test device for a silicone rubber material for a cable accessory and a method for preparing a sample. The method includes: adding a semi-conductive silicone rubber into xylene, performing spraying on a surface of a silicone rubber insulation sample sheet, performing a curing processing, cutting the sample sheet into a high-voltage electrode with a triangular longitudinal section end, then adhering the high-voltage electrode on the surface of the silicone rubber insulation sample sheet, and performing a high temperature vulcanization to obtain a silicon rubber sample sheet; placing the silicon rubber sample sheet into a mold, injecting a high temperature vulcanizable liquid silicone rubber mixture, and performing the high temperature vulcanization, to obtain a sample; and performing cutting at a position distanced from a tip of the high-voltage electrode by 2 mm, and adhering a ground electrode of a flat plate-like structure at the cross section/

A system for evaluating a high voltage asset (HV asset) comprises a PD detector disposed in the HV asset. The PD detector comprises an electrical coupler configured to couple electrical disturbances indicative of a partial discharge from a high voltage conductor of the HV asset to an electrical-to-optical converter. The electrical-to-optical converter comprises a light emitter, and is configured to convert the electrical disturbances to a light signal. An optical power receiver is disposed in the high voltage asset and coupled to the PD detector. The optical power receiver is configured to receive optical power from an external optical power source via a non-conducting optical fiber arrangement. The electrical-to-optical converter is configured to communicate the light signal indicative of the partial discharge to an electronic device external of high voltage asset via the non-conducting optical fiber arrangement.

Provided is a cable and joint inspection system, process and computer readable medium enabling cable and joint inspection functions. The system includes an x-ray cabinet containing an x-ray camera and positioning equipment. The x-ray camera is positionable to obtain an x-ray image of a portion of a cable or a cable joint. The x-ray images are evaluated to determine whether a bounded area is within the x-ray image. The processor may measure the size of the bounded area in the x-ray image based on a number of pixels forming the bounded area. In response to the size of the bounded area being greater than an inclusion or void allowance threshold, the processor may flag the bounded area as an inclusion or void and flag pixel locations in the x-ray image. The flagged pixel locations correspond to a physical location within the portions of the cable or the cable joint.

The present application is directed to an electrical system including a housing configured to hold electrical components within an internal volume. In one aspect the electrical system is a power transformer. A sensor is mounted to the housing and is configured to sense a parameter associated with one or more electrical components during operation of the electrical system. A control system including a communication unit and a data processing unit is operable for analyzing the sensed parameter and comparing the sensed parameter to a predetermined minimum or maximum threshold value.

A device and method for detecting a location of an arc event between a power bus and a coupler of an electric vehicle monitors an interface between the power bus and the coupler for the occurrence of an optical event. A determination is made if an arc event occurred based on the optical event, and upon determining the occurrence of an arc event at least one of a time the arc event occurred or a position of the electric vehicle at the time the arc event occurred is recorded.

A test device to localize a partial discharge in or at an electrical component may include at least one antenna to capture an electromagnetic wave caused by a partial discharge in the electrical component. The test device includes multiple microphones arranged in an environment around the electrical component. The microphones capture sound waves caused by the partial discharge. It is examined if an intensity of the electromagnetic wave exceeds a first limit value and/or the intensity of the sound wave captured by one of the multiple microphones exceeds a second limit value. Depending on the captured sound wave and/or the electromagnetic wave and on the examination relating to the first and/or second limit value, a location of the partial discharge can be determined.

An experimental device for tripping properties of a high-voltage transmission line in a smoldering atmosphere, including a central information processor, a biomass fuel (BMF) property characterization module, a smoldering generation module, a smoldering smoke field property test module, a power frequency supply module and a tripping property test module. The experimental device and method for tripping properties of a high-voltage transmission line in a smoldering atmosphere, the present disclosure can explore the development conditions, processes, modes, properties and mechanisms of discharge in the smoldering atmosphere, and fully characterize the BMF such as forest vegetations from multiple aspects, to reproduce properties of forest vegetations in corridor areas of the high-voltage transmission line in multiple working conditions and reflect influences of properties of ground forest vegetations on the tripping properties of the high-voltage transmission lines.

A lightning strike alarm system using a Bipolar Conventional Air Terminal comprises a sensor electrically connected to a rod element electrified by a ground charge and an electrification plate-cone or an electrification plate-tube electrified by a thunderstorm cloud, and configured to measure electric energy induced in the electrification plate-cone or the electrification plate-tube; and a controller configured to determine that the thunderstorm cloud has approached when the electrical energy is greater than a reference energy; and an alarm device configured to output an alarm signal, based on a result of determining that the thunderstorm cloud has approached, wherein the sensor comprises: a luminescence unit, including a voltage stabilizer preventing induction of a high voltage due to the thunderstorm cloud, configured to emit light by the electric energy; and a light receiver configured to receive the light, convert the light to electric energy, and transfer the electric energy to the controller.