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InsemMar 20242019 patternBE Electrical

Switchgear and Protection SPPU Insem Question Paper Mar 2024

All 4 questions from this SPPU insem paper, as printed. Read them here or open the PDF.

Open the PDFMost repeated Switchgear and Protection questions
Subject code
403148
Pattern
2019 pattern
Exam
Insem
Session
Mar 2024
Max. marks
30
Time
1 Hour
Semester
VIII
Paper code
[6270]-60

Printed for: B.E. (Electrical Engineering) (Insem)

Instructions to the candidates

  1. Solve Q.1 or Q.2, Q.3 or Q.4.
  2. Figures to the right indicate full marks.
  3. Neat diagrams must be drawn wherever necessary.
  4. Assume suitable additional data if necessary.
  5. Use of non-programmable calculator is allowed.

Questions

  1. Q1

    1. a)

      Explain different causes of faults in a power system.

      Also asked:Feb 2023

      [3]
    2. b)

      Define zones of protection? Explain primary and backup protection with diagrams?

      [6]
    3. c)

      This part has equations that don’t show as text. Open the PDF to read it.

      [6]

  2. Q2

    1. a)

      Explain with neat diagram principle of current differential relay.

      Also asked:May 2025

      [3]
    2. b)

      With a suitable diagram explain construction & working of Induction disc type overcurrent relay?

      Also asked:Feb 2023

      [6]
    3. c)

      Explain the trip circuit of C.B with suitable diagram? 2

      [6]

  3. Q3

    1. a)

      Explain high and low resistance principles of arc interruption in case of circuit breakers?

      Also asked:Feb 2023

      [8]
    2. b)

      Derive the equation for restriking voltage, RRRV & maximum value of RRRV in case of circuit breaker.

      [7]

  4. Q4

    1. a)

      A 3 phase 50 Hz alternator has inductance of 3 mH/ph & capacitance of 0.025 μ F/ph. The circuit breaker opens when RMS current is 8000 A. Determine: i) frequency of oscillations ii) Peak restriking voltage iii) Average rate of restriking voltage iv) Maximum value of restriking voltage

      Also asked:Mar 2025

      [8]
    2. b)

      Explain with suitable diagrams resistance switching in case of circuit breaker? State the expression for damped frequency oscillations. … … …

      [7]