BEEE05

HIGH VOLTAGE ENGINEERING


OBJECTIVE: To learn the methods of high voltage and current generation and their measurement and high voltage testing procedures.

1.OVERVOLTAGES AND INSULATION COORDINATION

Causes & types of over voltages - Lightning, switching, temporary overvoltages - Effects of overvoltages on power system components - EMI and EMC protection against overvoltages - Surge diverters - Insulation co-ordination.

2.GENERATION OF HIGH VOLTAGES AND HIGH CURRENTS

Generation of high AC and DC, impulse and switching voltages - Generation of high impulse currents.

3.MEASUREMENT OF HIGH VOLTAGES AND HIGH CURRENTS

Measurement of high AC, DC, impulse and switching voltages using sphere gaps, peak voltmeters, potential dividers, high speed CRO and digital techniques - Measurement of high currents.

4.DIELECTRIC BREAKDOWN

Self and non self restoring insulation - Breakdown in gases, liquids and solids - Breakdown in uniform and non-uniform fields - partial discharges - Corona.

5.HIGH VOLTAGE TESTING

Staandards and specifications - Types of tests - Testing and fault diagnostics - Testing of circuit breakers, isolators and air switches - Testing of insulators, bushing and surge diverters.