EX-702 (C) · High Voltage Engineering/Official Syllabus
High Voltage Engineering (EX-702 (C)) - Official Syllabus
1
Unit 1
Introduction
- Introduction to HV technology
- advantages of transmitting electrical power at high voltages
- need for generating high voltages in laboratory
- Important applications of high voltage
2
Unit 2
Breakdown phenomena
- Classification of HV insulating media, Properties of important HV insulating media
- Gaseous dielectrics: Ionizations: primary and secondary ionization processes
- Criteria for gaseous insulation breakdown based on Townsend019s theory, Limitations of Townsend019s theory
- Streamer019s theory breakdown in non uniform fields
- Corona discharges
- Paschen019s law and its significance
- Time lags of Breakdown
- Breakdown in solid dielectrics: Intrinsic Breakdown, avalanche breakdown
- thermal breakdown, and electro mechanic breakdown
- Breakdown of liquids dielectric dielectrics: Suspended particle theory, electronic Breakdown
- cavity breakdown (bubble019s theory), electro convection breakdown
3
Unit 3
Generation of HV AC DC and Impulse Voltage and current
- HV AC-HV transformer; Need for cascade connection and working of transformers units connected in cascade
- Series resonant circuit principle of operation and advantages
- Tesla coil
- HV DC- voltage doubler circuit, cock croft- Walton type high voltage DC set
- Introduction to standard lightning and switching impulse voltages
- Analysis of single stage impulse generator-expression for Output impulse voltage
- Multistage impulse generator Components of multistage impulse generator
- Triggering of impulse generator by three electrode gap arrangement
- Triggering gap and oscillograph time sweep circuits
- Generation of switching impulse voltage
- Generation of high impulse current
4
Unit 4
Measurement of high voltages
- Electrostatic voltmeter-principle, construction and limitation
- Generating voltmeter- Principle, construction
- Series resistance micro ammeter for HV DC measurements
- Standard sphere gap measurements of HV AC, HV DC, and impulse voltages; Factors affecting the measurements
- Potential dividers-resistance dividers capacitance dividers mixed RC potential dividers
- Surge current measurement
5
Unit 5
High voltage tests on electrical apparatus
- Definitions of technologies, tests on isolators
- circuit breakers, cables insulators
- and transformers
Reference Books
- High voltage engineering fundamentals — E. Kuffel, W.S. Zaengl — Elsevier — 2nd edition
- High Voltage Engineering — M.S.Naidu, Kamaraju — THM — 3rd edition
- High Voltage technology — L. L. Alston — BSB Publication
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