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The amplitude and frequency of the UHF partial discharge pulses are digitized, analyzed and processed in order to generate an appropriate partial discharge data output, supervisory control and data acquisition alarm. Depending on the provider of the system, the partial discharge outputs are accessible through either a local area network, via ...
The variations of Q/Q (full) and V/V (full) with H/D ratio is shown in figure(b).From the equation 5, maximum value of Q/Q (full) is found to be equal to 1.08 at H/D =0.94 which implies that maximum rate of discharge through a conduit is observed for a conduit partly full.
Dielectric-barrier discharge (DBD) is the electrical discharge between two electrodes separated by an insulating dielectric barrier. [1] Originally called silent (inaudible) discharge and also known as ozone production discharge [2] or partial discharge, [3] it was first reported by Ernst Werner von Siemens in 1857. [4]
Insulating materials within electrical equipment liberate gases as they slowly break down over time. The composition and distribution of these dissolved gases are indicators of the effects of deterioration, such as pyrolysis or partial discharge, and the rate of gas generation indicates the severity. [2]
IEC 60270 High-voltage test techniques – Partial discharge measurements IEC 60273 Characteristic of indoor and outdoor post insulators for systems with nominal voltages greater than 1000 V IEC 60276 Definitions and nomenclature for carbon brushes, brush-holders, commutators and slip-rings
Electrical treeing first occurs and propagates when a dry dielectric material is subjected to high and divergent electrical field stress over a long period of time. . Electrical treeing is observed to originate at points where impurities, gas voids, mechanical defects, or conducting projections cause excessive electrical field stress within small regions of the di
Mucopurulent discharge, the emission or secretion of fluid containing mucus and pus; Nipple discharge, the release of fluid from the nipples of the breasts; Rectal discharge, fluid released from the anus; Emotional discharge, in co-counselling, the ways in which pent-up emotional hurt can be released, e.g. via crying, laughter, etc.
A corona discharge is an electrical discharge caused by the ionization of a fluid such as air surrounding a conductor carrying a high voltage. It represents a local region where the air (or other fluid) has undergone electrical breakdown and become conductive, allowing charge to continuously leak off the conductor into the air.