Cochin University of Science and Techology (CUST) 2011-6th Sem B.Tech Electrical and Electronics Engineering BTech ,il - EE 604 ELECTRICAL DRAWING ( 2006 Scheme) - Question Paper
BTS(C) - VI - 11- 014-S
B. Tech Degree VI Semester Examination April 2011
EE 604 ELECTRICAL DRAWING
(2006 Scheme)
Time : 3 Hours Maximum Marks : 100
I. Draw the developed winding diagram of lap winding for 6 poles, 18 slots, double layer winding showing the direction of motion, direction of induced emfs and position of
brushes. (25)
OR
II. Draw to a suitable scale the half sectional elevation of a dc machine as per the following dimensions:
|
Diameter of the shaft |
= 13 cm |
|
Outside diameter of the armature |
= 36 cm |
|
Number of poles |
= 4 |
|
Pole height |
= 16 cm |
|
Pole width |
= 12cm |
|
Pole arc |
= 0.65 |
|
No. of interpoles |
= 4 |
|
Interpole dimensions |
= 4cmx 15cm |
|
Thickness of yoke |
= 3.5cm |
|
Depth of slot |
= 2.5cm |
III. Draw the half sectional longitudinal view of a lOhp 3 phase 50Hz 4 pole squirrel cage
induction motor with following dimensions:
Stator
Internal diameter of the stator = 18 cm.
Outside diameter of the stator = 32 cm.
Gross length of the stator core = 13.5 cm.
No. of slots = 36
Slot width = .77 cm.
Slot depth = 3.4cm.
Length of air gap = 0.1cm.
Rotor
No. of slots = 31
Rotor bars = 0.51cm x 1.52 cm
Shaft diameter = 5.1cm.
(25)
OR
(P.T.O)
|
Diameter of Shaft |
= 7.6 cm |
|
Diameter of rotor |
= 46 cm |
|
Height of pole |
= 7.6 cm |
|
Outside diameter of stator |
= 76 cm |
|
External diameter of supporting frame |
= 92 cm |
|
Number of poles |
= 10 |
|
Overall distance of the base plate from | |
|
the centre line of the alternator to the |
= 50 cm. |
|
ground level. |
V. Draw a winding diagram for a 4 - pole, 24 slot, 3 phase mush connected armature. (25)
OR
VI. For a 3 phase ac machine the armature is having 24 slots. A single layer concentric bifurcated winding for four poles is to be made. Draw the developed winding diagram
with the overhang in three planes. (25)
VII. Draw the single line layout of a typical generating station. (25)
OR
VIII. (a) Draw a 220KV double circuit transmission tower. 1 (b) Draw a 66KV single circuit transmission tower. J
'k'k'k
|
Attachment: |
| Earning: Approval pending. |
