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The treeing phenomena are well known as an initiation process of electrical breakdown in the electric power cables. It is discussed that the charge injection from electrode is related to the growth of the tree. The space charge measurement technique by the pulsed electro-acoustic (PEA) method is widely used. However, the measurement technique in the non-uniform electric field has not been realized...
The breakdown voltage in a small spacing under dc voltage application has been well described with the Paschen law. The present paper differs from the previous works in that we employ ac voltage. The electrode system employed is sphere-plane electrodes and the sphere and/or sphere electrodes are coated with an epoxy resin. The breakdown voltage of air gap of the Metal (M) - Air gap (G) - M, MG-Epoxy...
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