B.TechSemester 72022-23High Voltage EngineeringKEE073
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High Voltage Engineering (KEE073) - AKTU Question Paper 2022-23

B.Tech · Semester 7 · Free PDF Download

This is the official AKTU High Voltage Engineering Previous Year Question Paper for B.Tech Semester 7, academic session 2022-23. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.

Course:B.Tech
Semester:Semester 7
Session:2022-23
University:AKTU / UPTU

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Questions Asked in 2022-23

High Voltage Engineering (KEE073) — complete question paper

Section AAttempt all questions in brief. 2 x 10 = 20
  • a
    Give the characteristic of liquid dielectrics
  • b
    Explain the time lags for breakdown
  • c
    What is the need of generating high AC and DC voltages?
  • d
    What is a resonant transformer? why it is used
  • e
    Define the front and tail times of an impulse wave
  • f
    What is a trigatron gap?
  • g
    Which factors that affect the spark over voltage of sphere gap
  • h
    Define protective devices? (i) Explain withstand voltage. (j) Define complex permittivity
Section BAttempt any three of the following: 3x10=30
  • a
    Explain the different types of s olid dielectrics materials, Gi ve their properties also
  • b
    Why a Cockcroft-Walton circuit is preferred for voltage multip lier circuits? Explain its working with a schematic diagram
  • c
    What is capacitance voltage tra nsformer? Explain with phasor d iagram how a tuned capacitance voltage t ransformer can be used for vol tage measurements in power systems
  • d
    An infinite rectangular wave on a line having a surge impedanc e of 500 Ω strikes a transmission line terminated with a capacitance of 0.004 µF. Calculate the extent to which the wave front is retarded?
  • e
    Explain three electrode arrangeme nt used in dielectric measurement? Explain with sketches the electrode arrangements for (a) solid specimen
Section CAttempt any one part of the following: 10x1=10
  • a
    What will the breakdown strengt h of air be for small gaps (1 m m) and large gaps (20 cm) under uniform field conditions and standard atmospheric conditions?
  • b
    Differentiate between breakdow n in pure liquid and commercial liquid
  • a
    A 12 stage impulse generator has 0.120 μF capacitors. The wave front and the wave tail resistances connected are 700 ohms and 6000 o hms respectively. If the load capacitor is 1200 pF, Find the front and tail times of the impulse wave produced
  • b
    Define the front and tail times of an impulse wave. What are t he tolerances allowed as per the specifications?
  • a
    Discuss the different methods of measuring high dc voltages. Wh at are the limitations in each method?
  • b
    A generating voltmeter has to be designed so that it can have a range from 20 to 200 KV DC if the indicating meter reads a minimum current of 2 µA and maximum current of 25 µA, what should the capacitance of the generating voltmeter be?
  • a
    Explain the causes for switchi ng and power frequency overvoltag e? How are they controlled in power systems?
  • b
    Write short notes on: (i) Rod gaps used as protective devices ( ii) Ground wires for protection of overhead lines
  • a
    The capacitance and loss angle o f the above specimen were measu red using the same electrode set up. The capacitance and tan δ with t h e specimen are 147 pF and 0.0012, respectively. The air capacitan ce of the electrode system was 35 pF. What is the dielectric constant a n d complex permittivity of Bakelite?
  • b
    Discuss the method of balanced detection for locating partial discharges in electrical equipment

Question text is extracted from the official AKTU question paper PDF above. Hindi translations are omitted — every question is printed in English in the original paper. Last verified: 2026-08-23.

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