(0 R7955 Pages: 2

2 lamps, 2 PP,

3 Plugs 2 lamps, 2 plugs,
2 lamps, 2 plugs, 1 PP, 1Fan
1 PP, 2 Fans

Kitchen

Bed Room1

StreetRoad ‏جل‎

2 lamps, 2 plugs,
1 PP, 1Fan 2 lamps, 1Fan

Bed Room2 Sitout

PART C
Answer any two full questions, each carries 10 marks.
12 Draw the single line diagram of a transformer substation of 400 kVA, 11 kV/ 415 V, (10)

dry type transformer. Specify the rating of each unit at the primary and secondary side

of the transformer with proper justification.

13 a) Design a wiring plan for installing a 40117 induction motor in an industry. (6)
b) How do you select the starter for 40110 Induction motor of 0.8pf, 80% efficiency? (4)
Explain.
14 2) Howdo you design an earth mat in substation? Explain its importance. (5)
b) What are most common test in UG cables? Explain. (5)
PART D

Answer any two full questions, each carries 10 marks.

15 An office 30m X 15m is illuminated by twin 40w fluorescent luminaries of lumen (10)
output 5600 lumens. The lamps being mounted at a height of 3m from the work plane,
the average illumination required is 240lux. Calculate the number of lamps required
to be fitted in the office, assuming the CU 0.6 and maintenance factor to be 0.8.
Assume the height of ceiling as 4.5m

16 a) Explain rising mains and rising buses in high rise buildings. (4)

b) Explain the various design parameters taken into consideration while designing street (6)

lighting and flood lighting.

17 Explain with suitable line diagram, how standby generators can include in existing (10)

electrical supply system. Assume HT consumer connection.

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