INVESTIGATING PARTIAL DISCHARGE BEHAVIOUR AND EXTRACTING DIAGNOSTIC MARKERS FOR PARTIAL DISCHARGE AGING OF TYPE I INSULATING MATERIALS

• Main Author: HERMANSYAH - NIM: 23216007 , MUHAMMAD
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/29225
• Institution: Institut Teknologi Bandung

<p align="justify">The coming use of electric motors at higher voltage, using Type I (organic) insulation system is moving significant attention to the design of the insulation system. In fact, increasing voltage, compared to the present operation voltage levels, rises the risk of inception of partial discharges, PD. PD will bring the insulation rapidly to breakdown if incepted and sustained, so that application of socalled corona-resistant materials seems to be an attractive feature to prolong motor life even if PD are incepted during operation. This paper deals with investigation of Partial Discharge and surface erosion endurance on Type I insulation. Considering two types of reference materials of the Kapton family, one having enhance resistance to PD (CR, corona resistant), a shortterm PD test procedure using needle-plane electrodes was been devised in order to get a fast characterization of the capability of an insulating material to endure PD. Partial Discharge data and surface erosion were acquired and measured hourly, in order to obtain both a life line plot and a time behavior of the erosion depth. Life lines were also obtained using classical accelerated life test procedure, using cylindrical-shape electrodes. The results show significantly different PD endurance and erosion rate between the two tested materials, thus indicating that such short-term procedures may be useful for the selection of insulating materials and of the design field.<p align="justify">