Module 1
Insulating materials – classification, brief study of preparation and properties of ceramics, mica, paper, PVC, PE Epoxy resin, teflon, SF6 transformer oil, polychlorobiphenyls (PCB) vacuum purification of transformer oil- drying and degassing. Impregnation of paper and cotton insulation.
Insulating materials – classification, brief study of preparation and properties of ceramics, mica, paper, PVC, PE Epoxy resin, teflon, SF6 transformer oil, polychlorobiphenyls (PCB) vacuum purification of transformer oil- drying and degassing. Impregnation of paper and cotton insulation.
Module 2
Dielectric properties – permittivity, complex permittivity, dielectric loss factors influencing permittivity, permittivity of mixtures, factors influencing tan delta, Measurement of resistivities, dielectric loss and constant, testing for tracking partial discharge measurements.
Dielectric properties – permittivity, complex permittivity, dielectric loss factors influencing permittivity, permittivity of mixtures, factors influencing tan delta, Measurement of resistivities, dielectric loss and constant, testing for tracking partial discharge measurements.
Module 3
Polarisation – internal fields, Clausins – Mossotd relation limitations, different types of polarisaiton. Electric fields in homogeneous dielectrics, mechanical force under electric fields, absorption currents.
Insulation problems in high voltage transformers, surge phenomena, insulation design to withstand surges in transformers, Elementary de-sign of insulating system of capacitors.
Polarisation – internal fields, Clausins – Mossotd relation limitations, different types of polarisaiton. Electric fields in homogeneous dielectrics, mechanical force under electric fields, absorption currents.
Insulation problems in high voltage transformers, surge phenomena, insulation design to withstand surges in transformers, Elementary de-sign of insulating system of capacitors.
Module 4
Breakdown phenomena in gases – ionization processes, de-ionization processes, breakdown mechanisms, T ownrend’s theory. Steramer theory, Paschen’s law, breakdown in electronegative gases, uniform fields, non-uniform fields penning effect.
Breakdown phenomena in gases – ionization processes, de-ionization processes, breakdown mechanisms, T ownrend’s theory. Steramer theory, Paschen’s law, breakdown in electronegative gases, uniform fields, non-uniform fields penning effect.
Module 5
Breakdown mechanisms in vacuum-breakdown in liquid dielectrics pure liquids and commercial liquids, breakdown in solid dielectrics – different types – intrinsic, electronic, thermal, electromechanical, tracing and tracking, partial discharges, partial discharges.
Breakdown mechanisms in vacuum-breakdown in liquid dielectrics pure liquids and commercial liquids, breakdown in solid dielectrics – different types – intrinsic, electronic, thermal, electromechanical, tracing and tracking, partial discharges, partial discharges.
References
High Voltage Engineering: Naidu and Kamaraju
Ionisation, Conductivity and Breakdown in Liquids: Adam Czawski
High Voltage Engineering: Kuffel and Zeamgl
SF6 and Vacuum Insulation for High Voltage Applications: Naidu and Maller
Ionisation, Conductivity and Breakdown in Liquids: Adam Czawski
High Voltage Engineering: Kuffel and Zeamgl
SF6 and Vacuum Insulation for High Voltage Applications: Naidu and Maller