05-04-2017, 02:19 AM
SYLLABUS:-
UNIT I
High Voltage and Breakdown Phenomenon
Electric field stress due to high voltage, gas ,vacuum, liquid, solids and composites as dielectrics and insulator, estimation and control of electric stress and numerical methods for its computation, surge voltages and their distribution and control, application of insulating materials in transformer, rotating machines, circuit breakers, cable, power capacitors, bushings; breakdown in gaseous and liquid dielectrics, collision process, ionization process, Townsend’s Criteria of breakdown in gases, Paschen’s law, breakdown in pure and commercial liquids as insulator; intrinsic, electromechanical and thermal breakdown of solid dielectrics, breakdown in composite dielectrics.
UNIT II
Generation of High Voltages and Currents
Generation of high direct current voltages and high alternating current voltages, generation of impulse voltages and impulse currents, tripping and control of impulse generators.
UNIT III
Measurement of High Voltages and Currents
Measurements of high voltages - direct, alternating and impulse, measurements of high currents–direct, alternating and impulse, Oscilloscope for impulse voltage and current measurements.
UNIT IV
Over Voltage, Insulation Coordination and Testing
Causes of over voltage – lightning, switching, faults and other abnormal conditions, principles of insulation coordination in high voltage, extra high voltage and ultra high voltage power systems, measurement of DC resistivity, dielectric constant, loss factor and partial discharge, testing of insulators and bushings, isolators and circuit breakers, cables, transformers, surge arresters, measurement of Radio Interference.
UNIT I
High Voltage and Breakdown Phenomenon
Electric field stress due to high voltage, gas ,vacuum, liquid, solids and composites as dielectrics and insulator, estimation and control of electric stress and numerical methods for its computation, surge voltages and their distribution and control, application of insulating materials in transformer, rotating machines, circuit breakers, cable, power capacitors, bushings; breakdown in gaseous and liquid dielectrics, collision process, ionization process, Townsend’s Criteria of breakdown in gases, Paschen’s law, breakdown in pure and commercial liquids as insulator; intrinsic, electromechanical and thermal breakdown of solid dielectrics, breakdown in composite dielectrics.
UNIT II
Generation of High Voltages and Currents
Generation of high direct current voltages and high alternating current voltages, generation of impulse voltages and impulse currents, tripping and control of impulse generators.
UNIT III
Measurement of High Voltages and Currents
Measurements of high voltages - direct, alternating and impulse, measurements of high currents–direct, alternating and impulse, Oscilloscope for impulse voltage and current measurements.
UNIT IV
Over Voltage, Insulation Coordination and Testing
Causes of over voltage – lightning, switching, faults and other abnormal conditions, principles of insulation coordination in high voltage, extra high voltage and ultra high voltage power systems, measurement of DC resistivity, dielectric constant, loss factor and partial discharge, testing of insulators and bushings, isolators and circuit breakers, cables, transformers, surge arresters, measurement of Radio Interference.