Disclosed is a device for recognizing an arcing fault in incident light, comprising a sensor for detecting absorption lines of the incident light, and an evaluation unit which generates an evaluation signal then characteristic absorption lines are detected.

Propagating brush discharge testing systems may include a dielectric layer, an initiation electrode, a high-voltage switch, an optical sensor, and a controller. The initiation electrode has an exposed tip positioned adjacent to a surface of the dielectric layer. The high-voltage switch is configured to selectively isolate the initiation electrode from ground potential. The optical sensor is positioned and configured to sense light generated at the surface due to a propagating brush discharge. The controller is programmed to operate the high-voltage switch to ground the initiation electrode and to operate the optical sensor to collect light from the propagating brush discharge. Propagating brush discharge testing methods include positioning an exposed tip of an initiation electrode with respect to a surface of a dielectric layer, then charging the surface, and then grounding the initiation electrode to neutralize charge on the surface (generally causing a propagating brush discharge).

The present invention evaluates the status of discharge or dielectric breakdown having occurred as a result of application of an impulse voltage or current to a test sample by an electrostatic discharge tester. An electromagnetic wave antenna measures a radiation electromagnetic wave signal generated from the electrostatic discharge tester when the electrostatic discharge tester is driven and a radiation electromagnetic wave signal generated from the test sample when discharge or dielectric breakdown occurs. An evaluation section main body obtains and displays a dielectric breakdown occurrence timing TFO after application of the voltage and a dielectric breakdown voltage VFO. The dielectric breakdown occurrence timing TFO is obtained from the time difference between an applied voltage generation time obtained from the radiation electromagnetic wave signal generated when the electrostatic discharge tester was driven and a discharge generation time obtained from the radiation electromagnetic wave signal generated when dielectric breakdown occurred.

An arc flash validation system that detects incident energy produced by an arc flash is disclosed. The arc flash validation system comprises one or more power transformers (PT) and current transformers (CT). The voltage and current outputs from the PT and CT may indicate the incident energy of an arc flash. The PT and CT outputs may be stored in system memory. The arc flash validation system may analyze the stored data and compare the stored data to a predicted hazard level to generate a relay-event report.

In a non-contact discharge test performed in a poor electromagnetic noise environment, the energy of discharge is evaluated by detecting weak light emission and processing the intensity waveform of light emission of the discharge. A database is created by measuring the intensity waveform of light emission of discharge generated as a result of application of a voltage or current to a measurement object through use of a light emission measuring device, simultaneously measuring the current waveform of the discharge through use of a current measuring device, and storing in the database the relation between analysis data sets obtained through analysis of the waveforms on the basis of information of the voltage or current applied to the measurement object. The intensity waveform of the light emission of the discharge or spark generated from the measurement object is measured while an electromagnetic wave generated as a result of the discharge of the measurement object is used as a reference. The magnitude of the discharge is estimated as a value by comparing light emission data obtained through analysis of the intensity waveform with the data recorded in the database.

Systems and fixtures for mounting, under mechanical constraint, wire-like or fiber-like samples of a high aspect ratio and down to 100 micrometers in diameter are disclosed. A region of interest along the length of the sample resides between and beyond a mechanical constraint on either side, allowing access to the region of interest for a wide number of characterization probes. The fixture may provide electrical isolation between two retaining blocks by means of a dielectric support member. The design may achieve minimal thermal expansion along the length of the sample by the material selection for the dielectric support member. Electrical contact may be introduced to the sample through conductive constraints in the retaining blocks. The fixture may have a minimal size perpendicular to the length axis of the sample to facilitate high probe fluxes when a diverging probe is used. The fixture may provide high x-ray transparency between the retaining blocks. The systems and fixtures as described therefore may provide a means for performing electrical and thermal testing on samples, including but not limited to solder butt-joints, across multimodal in situ characterization and imaging techniques to analyze dynamic electromigration.

A field control element for a high-voltage cable accessory comprises an electrically insulating material. The electrically insulating material includes a fluorescent dye adapted to convert a first radiation having a first wavelength and generated by an electrical discharge into a second radiation having a second wavelength longer than the first wavelength.

An arc fault detection apparatus, a method, a device and a storage medium are provided. The arc fault detection apparatus detects electric energy characteristics of a power line to be detected by a power wave detection module, detects arc energy characteristics of the power line to be detected by an arc detection module, and uses a data processing module to determine whether the power line to be detected has a fault according to the electric energy characteristics, preset electric energy characteristics, the arc energy characteristics and preset arc energy characteristics, so as to achieve accurate arc measurement by means of electricity measurement and arc measurement, and further restore the arc fault characteristics more completely to eliminate the arc fault misjudgment rate and achieve accurate judgment to improve the accuracy and reliability of arc fault detection.

The invention relates to an apparatus, method and system for measuring and optionally detecting an electrical discharge having a discharge magnitude, wherein the electrical discharge causes a corresponding emission of optical radiation. The apparatus embodies the system and method in accordance with the invention, wherein the method comprises measuring electrical discharge by firstly storing pre-determined calibration data comprising calibrated quantitative measurement values associated with magnitudes of electrical discharge and detector parameters corresponding thereto, the detector parameters being operating parameters associated with the optical detector, receiving and processing a particular detector parameter with the stored calibration data to detect an electrical discharge, and determine a quantitative measurement associated with the magnitude of the detected electrical discharge.

This application relates to methods and apparatus for determining the location of a fault (204) in a power cable (100) of a power distribution network. The method involves monitoring at least one electrical parameter of the power distribution network to detect the occurrence of a fault in the power cable and determine at least one time window (t.sub.win) for the occurrence of the fault. The fault may be detected by detecting opening of a circuit breaker (205). The method involves analysing a first set of measurement signals is obtained by a distributed fibre optic sensor (302) having a sensing optical fibre (301) deployed along the path of the power cable. The first set of measurement signals comprise signals indicative of the extent of any disturbances on each of a plurality of longitudinal sensing portions of the sensing fibre over a known time period. The measurement signals are analysed based on said at least one time window for measurement signals (502) indicative of a fault in the power cable and the location of the fault in the power cable is identified based on the location of one or more longitudinal sensing portions of the sensing fibre giving rise to the measurement signals indicative of a fault in the power cable.