EE2353 High Voltage Engineering - Nov / Dec 2013 Important Questions

[GOKULAKRISHNAN R]

Anna University

Department of Electrical and Electronics Engineering
.

Sixth Semester

EE2353 High Voltage Engineering

Part B Important Questions - 2013 Edition

(Regulation 2008)

Semester : 6
Department :Electrical and Electronics Engineering
Subject Code :EE2353
Subject Name : High Voltage Engineering
Type : Part B (16 marks) Important Questions.
Edition Details : V+ 2013 Edition
Syllabus Regulation : 2008

EE2353 High Voltage Engineering Important Questions for Part B (16 Marks)

Unit - I
1.    Draw the cross sectional view of non linear resistor lightning arrester (valve type) and explain its operation in detail and its V-I characteristics.
2.    Discuss mechanism of lightning stroke and over voltages on transmission lines and give its mathematical model.
3.    Explain Townsend’s first and second ionization process and derive the equation.
4.    Explain different theories of charge formation in clouds.
5.    What are the methods to control over voltages?
  
Unit - II
1.    State the criteria for sparking potential and hence obtain the relation between sparking potential and (PD)
values (Paschens law). Discuss nature of variation of sparking potential with PD values.
2. Explain breakdown mechanism on solid dielectric.
3. Explain breakdown mechanism on vacuum dielectric.
4. Explain breakdown in non uniform fields and corona discharge.
 
Unit - III
1. Starting from basic marx circuit develop the circuit of modern multistage impulse generator and explain its operation. Discuss significance of various parameters.
2. Explain vandegraff generator.
3. Explain cascade transformer connections and resonant transformer.
  
Unit - IV
1. Explain measurements of very high voltages using sphere gaps. Mention merits and de merits of using sphere gaps.
2. Explain electro static voltmeter for HVAC measurements. Give its advantages and    disadvantages.
3. Explain generating voltmeter for measuring high DC voltage.
4. Explain Capacitance voltage transformer.
5. Explain hall generator.
 
Unit -V
1.    Explain testing of transformer.
2.    Explain testing of insulator.
3.    Explain testing of isolators and circuit breakers.