WITH EFFECT FROM THE ACADEMIC YEAR 2013- 2014

EE 412

HIGH VOLTAGE ENGINEERING

(Elective-I)

Instruction                                              4              Periods per week

Duration of University Examination     3              Hours

University Examination                         75            Marks

Sessional                                                25            Marks

UNIT-I

Breakdown Mechanism of Gases, Liquids and Solid Materials:

Mechanism of breakdown of Gases, Townsend’s First Ionization coefficient, Cathode processes, Secondary effects, Townsend’s Second Ionization coefficient, Townsend’s breakdown mechanism,

The sparking potential, Paschen’s Law, Penning effect, Corona discharges, Time lag, breakdown in liquid dielectrics, treatment of transformer oil, Testing of transformer oil, Breakdown in solid dielectrics.

UNIT-II

Generation of High D.C and A.C Voltages: Half wave rectifier circuit, Cockroft Walton voltage multiplier circuit, Electrostatic generator, Van de Graf generator, Generation of high A.C voltages, series resonant circuit.

UNIT-III

Generation of Impulse Voltages and Currents: Impulse generator circuits, Analysis of circuits ‘a’ and ‘b’, Multistage Impulse generator circuit, Construction of Impulse generator, Impulse current generation.

UNIT-IV

Measurement of High Voltage and Currents: Sphere gap, Uniform field spark gap, Rod gap, electrostatic voltmeter, Generating voltmeter, Chubb Fortescue method, Impulse voltage, measurement using voltage dividers, Measurement of high D.C, A.C and Impulse currents.

UNIT-V

Testing of Power Capacitors: Testing of power transformers, Testing of circuit breaker, Test voltages, Voltage and power ratings of test equipment, layout of high voltage laboratories. Lightning phenomena and Line design.

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