Abstract
To investigate the stage development of Partial Discharge (PD) for Ethylene Propylene (EP) rubber used for insulation material of joint and terminal sections of cross-linked polyethylene (XLPE) cable, we focused on the magnitude of PD and the cumulative number of PDs per unit time. It was difficult to grasp the stage development of PD by temporal variations in Acoustic Emission (AE) signal intensity and the number of counted AE signals because they contained periods during which PD activity was not high even before breakdown occurred. In contrast, the cumulative number of AE signals could clearly show a point of time when a PD might form a pit or a tree in EP.
Published Version
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