Reg No.: Name:
10000EE405122001

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Seventh Semester B.Tech Degree Regular and Supplementary Examination December 2021 (2015 Scheme)

Course Code: EE405
Course Name: Electrical System Design
Max. Marks: 100 Duration: 3 Hours
PART A
Answer all questions, each carries 5 marks. Marks
1 Explain the significance of IS codes in electrical system design? How can we (5)

design a proper earthing system using IS codes for various electrical systems?

2 Discuss the functions of MCB. What are the criteria for the selection of MCB? (5)
3 Draw the single line diagram of ೩ 50016८4, 11kV/415V indoor substation and (5)
justify the component ratings.
4 Write short note on the substation earthing system. (5)
5 Explain the factors to be considered for an efficient lighting system design. (5)
6 Explain the laws of illumination with a neat diagram. (5)
7 Define continuous power, standby power and prime power of a standby (5)
generator.
8 What are different types of PV system designs used in electrical systems for (5)
renewable energy integration?
PART ए
Answer any two full questions, each carries 10 marks.
9 9) Discuss the aims of Indian Electricity Act 2003. (4)
b) Explain the pre-commissioning tests conducted for domestic installations. (6)

10 a) What are functions of RCCB? How does RCCB protect the electrical installation (5)
under fault conditions?
b) Explain the significance of NEC 2011 in Indian power sector. (5)
11 The plan layout of a three-bedroom domestic building is shown in figure. (10)
Compute the following
(a) Connected load for the building
(b) Maximum demand in kW

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