Trees in transparent polymers tested under oil

Olyphant, Murray

doi:10.1109/ceidp.1972.7734175

Cited by 2 publications

(1 citation statement)

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“…Mason [4] also noted that PD channels can propagate more rapidly in thin than in thick specimens, because there is less necessity for reconcentration of electric stress after initial penetration. It also has been reported [13,14] that regarding polyethylene, oxalic acid and crystals are formed on the surface of the voids with the consequence that the PD energy concentrates into eroded pits. Such chemical changes on the void surfaces and the creation of eroded pits should be related to the magnitude and energy of PD.…”

Section: Small Discharges Definitions and Means Of Detectionmentioning

confidence: 93%

Small partial discharges and their role in insulation deterioration

Danikas

1997

IEEE Trans. Dielect. Electr. Insul.

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It iis a well known fact that PD (partial discharge) affects the lifetime and the deterioration rate of an insulation. Research work has shown that a mixture of magnitudes and frequencies of PD may appear, depending on the type of the applied voltage, its frequency, the electrode arrangement, the type of the insulation under test, and a number of other parameters, such as temperature, humidity and pressure. Various types of discharges also have been recorded, such as streamer like discharges, Townsend discharges, glow and pseudoglow discharges. A type of discharges not yet well understood is the so called SPMD (swarming partial microdischarges), which seem to appear just before breakdown. In this paper, only aspects of the latter type of PLI are investigated. Some suggestions for further research regarding the SPMD are made.

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Section: Small Discharges Definitions and Means Of Detectionmentioning

confidence: 93%