MODULE-I (10 HOURS)
Conduction and breakdown in gases: Gases as insulating media, Ionisation processes. Townsend
current growth equation. Current growth in the presence of secondary processes. Townsend’s
criterion for breakdown. Experimental determination of ionization coefficients.
Breakdown in electronegative gases, time lags for breakdown, streamer theory of breakdown
in gases, Paschen’s law, Breakdown in non-uniform field and corona discharges,
Post breakdown phenomena and applications, practical considerations in using gases for
MODULE-II (10 HOURS)
Conduction and breakdown in liquid dielectrics: Pure liquids and commercial liquids, conduction
and breakdown in pure liquids.
Breakdown in solid dielectrics: Introduction, Intrinsic brakdown. Electromechanical breakdown,
Thermal breakdown.. Breakdown of solid dielectrics in practice.
MODULE-III (10 HOURS)
Generation of high voltage and currents: Generation of high D.C, voltages, Generation of high
alternating voltages, Generation of Impulse voltages. Tripping and control of impulse generators.
Generation of Impulse currents.
Measurements of high voltages and currents: Measurement of high D.C. voltages. Measurement
of high D.C. and impulse voltages. Introduction.. Measurement of high D.C. A.C. and impulse
currents, cathode ray oscillographs for impulse voltages and currents measurements.
MODULE-IV (10 HOURS)
Non destructive testing of materials and electrical apparatus: Introduction. Measurement of D.C.
resistivity. Measurement of dielectric constant and loss factor. Partial discharge measurements.
High voltage testing of electrical apparatus: Testing of insulators and bushings. Testing of
isolators and circuit breakers, cables. Testing of transformers, surge diverter
Radio Interference measurements.