Electrical Installation Design & Condition Based Maintenance SPPU Insem Question Paper Aug 2025
All 4 questions from this SPPU insem paper, as printed. Read them here or open the PDF.
- Subject code
- 303144
- Pattern
- 2019 pattern
- Exam
- Insem
- Session
- Aug 2025
- Max. marks
- 30
- Time
- 1 Hour
- Semester
- I
- Paper code
- [6579]-336
Printed for: T.E. (Electrical Engineering) (Insem)
Instructions to the candidates
- Solve Q1 or Q2, Q3 or Q4.
- Figures to the right indicate full marks.
- Neat diagrams must be drawn wherever necessary.
- Assume suitable additional data, if necesary.
- Use of non-programmable calculator is allowed.
Questions
Q1
- a)[7]
What are the types of primary distribution systems? Explain any two types with diagram.
- b)[8]
Derive equation for volume of conductor required for D.C. 2 wire system with midpoint earthed and 1-phase 2 wire system with midpoint earthed with diagram for overhead system.
OR- a)
Q2
- a)[7]
Explain the factors needed to be considered in design of distribution feeders.
- b)[8]
Cost of 3-Phase Overhead transmission line is Rs. (35000a+3500) per KM, where ‘a’ is cross section of each conductor in CM 2 . The line is supplying a load of 6 MW at 33 KV and 0.8 power factor lagging. The average working hours are 20 per day in a year. Energy cost is Rs. 0.05 per KWH and interest & depreciation of 10% per annum. Use Kelvin’s law to find the most economical size of the conductor. The specific resistance of conductor material is 10 -6 -CM. 2
- a)
Q3
- a)[7]
List the different bus bar arrangements in the substation and explain any one with diagram.
- b)[8]
Explain the following equipments used in the substation with symbol, location in the substation and function. i) Isolator ii) Current Transformer iii) Potential Transformer iv) Lightening Arrester
OR- a)
Q4