HIGH VOLTAGE
Test EEPB463, Semester 1 2012/2013
COLLEGE OF ENGINEERING
PUTRAJAYA CAMPUS
TEST
SEMESTER 1 2012 / 2013
PROGRAMME
: B. Eng Electrical Power (Honours)
SUBJECT CODE
: EEPB463
SUBJECT
: High Voltage Technology
DATE
: 11 July 2012
TIME
: 12.15 pm – 1.15 pm (1 hour)
Name:
Q1
Q2
ID No.:
Q3
Section:
Total
INSTRUCTIONS TO CANDIDATES:
1.
This paper contains THREE (3) questions in SEVEN (7) pages.
2.
Answer all questions.
3.
Write all answers in the spaces provided in this question paper.
4.
All steps and diagrams must be shown clearly in your answers.
THIS QUESTION PAPER CONSISTS OF 7 PRINTED PAGES INCLUDING THIS
COVER PAGE.
Page 1 of 7
Test EEPB463, Semester 1 2012/2013
QUESTION 1 [10 marks]
A high voltage assembly consists of two concentric spherical electrodes; aligned at the same center point. The inner electrode has a radius r1 whereas the outer electrode, r2. The voltage difference between the two electrodes is denoted as V.
Using Gauss’s theorem and electrostatic principle, derive the expression for field enhancement factor of this electrode configuration.
(10 marks)
Page 2 of 7
Test EEPB463, Semester 1 2012/2013
Page 3 of 7
Test EEPB463, Semester 1 2012/2013
QUESTION 2 [10 marks]
Figure 1 displays one of the earliest Van de Graaff generator with its corresponding simplified schematic diagram. This generator had produced up to 1000 kV dc voltage in
1952.
high voltage terminal collector insulating belt charging spray point motorized pulley
Figure 1
(a) Explain carefully the principal mechanism of this generator in producing high dc voltages. (6 marks)
(b) Explain how the rate of voltage generation by the system described in (a) can be increased. (4 marks)
Page 4 of 7
Test EEPB463, Semester 1 2012/2013
Page 5 of 7
Test EEPB463, Semester 1 2012/2013
QUESTION 3 [10 marks]
With the aid of relevant figures and/or
COLLEGE OF ENGINEERING
PUTRAJAYA CAMPUS
TEST
SEMESTER 1 2012 / 2013
PROGRAMME
: B. Eng Electrical Power (Honours)
SUBJECT CODE
: EEPB463
SUBJECT
: High Voltage Technology
DATE
: 11 July 2012
TIME
: 12.15 pm – 1.15 pm (1 hour)
Name:
Q1
Q2
ID No.:
Q3
Section:
Total
INSTRUCTIONS TO CANDIDATES:
1.
This paper contains THREE (3) questions in SEVEN (7) pages.
2.
Answer all questions.
3.
Write all answers in the spaces provided in this question paper.
4.
All steps and diagrams must be shown clearly in your answers.
THIS QUESTION PAPER CONSISTS OF 7 PRINTED PAGES INCLUDING THIS
COVER PAGE.
Page 1 of 7
Test EEPB463, Semester 1 2012/2013
QUESTION 1 [10 marks]
A high voltage assembly consists of two concentric spherical electrodes; aligned at the same center point. The inner electrode has a radius r1 whereas the outer electrode, r2. The voltage difference between the two electrodes is denoted as V.
Using Gauss’s theorem and electrostatic principle, derive the expression for field enhancement factor of this electrode configuration.
(10 marks)
Page 2 of 7
Test EEPB463, Semester 1 2012/2013
Page 3 of 7
Test EEPB463, Semester 1 2012/2013
QUESTION 2 [10 marks]
Figure 1 displays one of the earliest Van de Graaff generator with its corresponding simplified schematic diagram. This generator had produced up to 1000 kV dc voltage in
1952.
high voltage terminal collector insulating belt charging spray point motorized pulley
Figure 1
(a) Explain carefully the principal mechanism of this generator in producing high dc voltages. (6 marks)
(b) Explain how the rate of voltage generation by the system described in (a) can be increased. (4 marks)
Page 4 of 7
Test EEPB463, Semester 1 2012/2013
Page 5 of 7
Test EEPB463, Semester 1 2012/2013
QUESTION 3 [10 marks]
With the aid of relevant figures and/or