An arc detection assembly is provided and includes a first conductor comprising a first terminal end, a second conductor comprising a second terminal end, an enclosure to partially enclose a space in which the first and second terminal ends are engageable to form an electrical connection and an optical detection system. The optical detection system includes an optical element within the enclosure with a line-of-sight to an engagement of the first and second terminal ends and a sensor. The sensor is displaced from the enclosure and coupled to the optical element. The sensor is configured to determine when the optical element senses an arcing condition between the first and second terminal ends.

A system includes a first galvanic isolator, a second galvanic isolator, a sensor, and a monitoring module. The first galvanic isolator includes a first electrical insulator. The second galvanic isolator is connected in series with the first galvanic isolator and includes a second electrical insulator. The sensor generates a first output signal based on an electrical characteristic of one of the first and second electrical insulators. The monitoring module, based on the first output signal, selectively generates a signal indicative of a failure of at least one of the first and second electrical insulators.

A partial discharge detection system for detecting partial discharge events in an electrical component includes a transducer configured to receive a signal from the electrical component generated due to an occurrence of a partial discharge and responsively provide a transducer output. A signal processing chain includes a filter coupled to the transducer which filters the transducer output signal and responsively generating a filtered output. A digital signal processor performs a Discrete Fourier Transform (DFT) on the filtered output and generates coefficients which correspond to different modulation frequencies of the filtered, output. A controller identifies an occurrence of a partial discharge in the electrical component based upon the plurality of coefficients.

A system includes a first galvanic isolator, a second galvanic isolator, a sensor, and a monitoring module. The first galvanic isolator includes a first electrical insulator. The second galvanic isolator is connected in series with the first galvanic isolator and includes a second electrical insulator. The sensor generates a first output signal based on an electrical characteristic of one of the first and second electrical insulators. The monitoring module, based on the first output signal, selectively generates a signal indicative of a failure of at least one of the first and second electrical insulators.

According to one implementation, an explosive spark estimation system includes an explosive spark estimation system includes a measuring system and a processing system. The measuring system is adapted to measure intensity of light, included in a spark occurred from an object to be tested. The light is within at least one specific wavelength band. The processing system is adapted to determine whether the spark is explosiveness based on the intensity of the light. Further, according to one implementation, an explosive spark estimation method includes: measuring intensity of light, included in a spark occurred from an object to be tested, within at least one specific wavelength band; and determining whether the spark is explosive, based on the intensity of the light.

Provided are a fault diagnosis apparatus and method based on fluorescence multivariate correction analysis of transformer oil, relating to the field of transformer fault diagnosis technology. Thus, the problem of large volume and weight of the apparatus, high costs, and inconvenience to use caused when in the related art, a fluorescence spectrometer is directly used to acquire the fluorescence spectrum of transformer oil is solved. The monochromatic excitation light of an optimal excitation wavelength generated by a fluorescence excitation source is used to excite the transformer oil in a fluorescence excitation detection apparatus to generate fluorescence. The fluorescence excitation detection apparatus generates the fluorescence according to the input monochromatic excitation light and inputs the fluorescence to a fluorescence signal acquisition and analysis apparatus. Since the fluorescence signal acquisition and analysis apparatus acquires and analyzes the fluorescence signal emitted by the transformer oil by using a multivariate correction filter group, the emission monochromator component of the fluorescence spectrometer is replaced. In this manner, the equipment costs and the equipment volume are reduced, and data processing is rapid. Thus, the cost performance of the fault detection of the transformer oil is improved, thereby implementing the engineering application of the fluorescence monitoring technology in the online diagnosis of the transformer failure.

An electrical arc detector for switchgear includes a fiber-optic cable configured to receive light emitted from switchgear at a first end and transport the light to a second end. The detector further includes a sensor arranged adjacent the second end of the fiber-optic cable configured to sense the light and generate an electrical signal, and analog-to-digital converter configured to convert the electrical signal to a digital signal, and a processor configured to monitor the digital signal and at least one of transmit information related to the digital signal, store information related to the digital signal, and take action based on the digital signal.

A partial discharge detecting method using ultraviolet imagery under pulse voltage condition is discussed. The method samples video data at a partial discharge area of a target electric system by an ultraviolet imager, obtains an ultraviolet image by extracting video frames from the video data, obtains a discharge intensity data P based on a sum number of pixels with a brightness value higher than a brightness threshold in the ultraviolet image; and obtains a quantization result Q of the partial discharge of the target electric system based on the discharge intensity data P and discharge characteristic parameters.

A fault detection system for use with wire includes an outer housing and a detection component positioned within the housing. The detection component includes a plurality of emitters and a plurality of detectors positioned around an examination area through which a wire is traversed. Each adjacent pair of emitters is spaced no more than 30 degrees apart, and each of the plurality of detectors is positioned across the examination area from a corresponding emitter. Each of the emitters is configured to emit a signal that is measured by a corresponding detector, and the detection component is configured to detect one or more defects on a surface of the wire based upon changes in the signals measured by one or more of the plurality of detectors.

A system adapted to inspect an object including a flexible wire includes a feed device feeding the object toward an inspection device, a magnet and a wire holding fixture. The magnet is adapted to secure to the flexible wire of the object as it approaches the inspection device. The wire holding fixture engages with the wire secured by the magnet and maintains the wire in a predetermined position relative to the object being inspected, and outside of a field of detection of the inspection device.