Dr. A.P.J. Abdul Kalam University BE VI SEM (EX) High Voltage Engineering [EX-605] June 2021 Question Paper

Dr. A.P.J. Abdul Kalam University

Bachelor of Engineering

Sixth Semester Examination, June-2021

High Voltage Engineering [EX-605]

Branch- EX

Time: 3:00 Hrs Max Marks 70

Note: 1. Attempt any five questions. All question carry equal marks.

2. Assume suitable data if necessary and state them clearly.

Q.1 (a) What are the advantages of transmitting electrical power at high

voltages?

(b) Mention the need for generating high voltages in laboratory.

Q.2 (a) Discuss the Classification of HV insulating media and write the

Properties of important HV insulating media.

(b) What is the criteria for gaseous insulation breakdown based on

Townsend's theory?

Q.3 (a) What are the Limitations of Townsend's theory?

(b) Describe Paschen's law and its significance.

Q.4 (a) What are the types of Breakdown of liquids dielectrics? Describe (any

two).

(b) What is the need for cascade connection and also explain the working of

transformers units connected in cascade.

Q.5 (a) What is series resonant circuit? Explain its principle of operation and

advantages.

(b) Describe Triggering of impulse generator by three electrode gap

arrangement.

Q.6 (a) Describe electrostatic voltmeter with its principle construction and

limitation.

(b) Describe generating voltmeter with its principle and construction.

Q.7 (a) Describe high voltage tests on isolators and circuit breakers.

(b) Mention the process of high voltage tests on cables insulators and

transformers.

Q.8 Write short notes on:

(i) Generation of switching impulse voltage.

(ii) Generation of high impulse current.

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