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Please use this identifier to cite or link to this item: http://hdl.handle.net/2080/1735

Title: Microscopic study of a solid insulating material after breakdown under DC and AC voltages
Authors: Mohanty, S
Ghosh, S
Panda, P C
Keywords: Insulation breakdown
Partial Discharge
Electron Microscopy
Issue Date: Jul-2012
Citation: International Conference on Properties andApplications of Polymeric Materials, ,July 24-28 2012, Central Power Research Institute, Bangalore
Abstract: The monitoring of the state of the insulation and it’s interpretation is an important and challenging task. In order to monitor the state of the insulation after application of various voltages under DC and AC conditions, the samples of the paper insulating material Leatherite paper was observed under Scanning Electron Microscope (SEM). The SEM (JEOL JSM-6480LV) was operated in low vacuum mode in order to observe the samples, which are difficult to view due to excessive surface charging. The experimental data were obtained by using a cylinderplane electrode system with artificially created cavities punched at the centre of the sample. The SEM observations for the virgin samples of Leatherite paper (thickness of 0.13 mm) and the samples stressed with a voltage of 50%, 75% of breakdown voltage and on breakdown were taken under application of DC voltage. On comparison with a virgin sample, no indication of insulation deterioration was observed for the sample with the application o...
Description: Copyright belongs to proceeding publisher
URI: http://hdl.handle.net/2080/1735
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