Rajasthan Technical University 2010 B.Tech Electrical Engineering Vl Sem.(Main/Back) ,- 6EE2 High Voltage Engineering - Question Paper

B.Tech. Vl Sem.(Main/Back) Examination, June - 2010
Electrical Engineering
6EE2 High Voltage Engineering
Time: three Hours Total Marks: 80
Min. Passing Marks: 24
Instructions to Candidates :
Attempt overall 5 ques. selecting any 1 ques. from every unit. All ques. carry equal marks. (Schematic diagrams must be shown whenever necessary. Any data you feel missing may suitably be presumed and said clearly. Units of volumes used/calculated must be said clearly.)

UNIT - I
1. (a) explain the breakdown in electromagnetic gases taking suitable example. (8)
(b) define the applications of gases in power system area. (8)
OR
(a) explain the suspended solid practicle mechanism breakdown taking suitable example. (8)
(b) explain the treeing and teacking breakdown in solids in detail. (8)


UNIT - II
2. (a) define the basic voltage about multiplier circuit for high voltage generation. (8)
(b) define about the cascadded transformers for hogh ac voltage generation. (8)
OR
(a) explain the Mark's multi-stage generator method for impulse voltage generation. (8)
(b) explain the construction and operation of sphere gap method with regards to the measurement of high voltage. (8)


UNIT - III
3. explain the high voltage Schering bridge for the subsequent :-
(a) Measurement of capacitance.
(b) Measurement of dielectric loss. (16)
OR
(a) explain the partial discharge equivalent circuit. (8)
(b) explain about the discharge detection circuit. (8)


UNIT - IV
4. discuss and explain the subsequent with regards to over voltage :-
(a) Causes of over voltage.
(b) Over voltage due to lighting. (16)
OR
discuss and explain the subsequent with regards to travelling waves :-
(a) Travelling waves on transmission line-open end line.
(b) Attenuation of travelling waves. (16)


UNIT - V
5. discuss and explain the subsequent with regards to voltage production :-
(a) Construction & operation of protection angle and protective zone.
(b) Construction & operation of surge absorber and arching horn. (16)
OR
discuss and explain the subsequent with regards to insulation co-ordination :-
(a) Volt-time curves.
(b) Coordination of insulation levels. (16)

Earning:   Approval pending.