COMPUTER AIDED ELECTRICAL DRAWING (18EE643)

COMPUTER-AIDED ELECTRICAL DRAWING

• Course Code 18EE643 
• CIE Marks 40
• Teaching Hours/Week (L:T:P) (3:0:0) 
• SEE Marks 60
• Credits 03 
• Exam Hours 03

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Course Learning Objectives:

• To discuss the terminology of DC and AC armature windings.
• To discuss design and procedure to draw armature winding diagrams for DC and AC machines.
• To discuss the substation equipment, their location in a substation and development of a layout for substation.
• To discuss different sectional views of transformers, DC machine, its parts and alternator and itsparts.
• To explain development of sectional views of Transformers, DC machine and alternators usingthe design data,  sketches. Suitable CAD software can be used for drawings

PART - A

Module-1

Winding Diagrams:
(a) Developed Winding Diagrams of D.C. Machines: Simplex Double Layer Lap and Wave Windings.
(b) Developed Winding Diagrams of A.C. Machines:
(c)Integral and Fractional Slot Double Layer Three Phase Lap and Wave Windings.
(d) Single Layer Windings – Un-Bifurcated 2 and 3 Tier Windings, Mush Windings, Bifurcated 3 Tier Windings.

Module-2

Single Line Diagrams: Single Line Diagrams of Generating Stations and Substations Covering Incoming Circuits, Outgoing Circuits, Busbar Arrangements (Single, Sectionalised Single, Main and Transfer, Double Bus Double Breaker, Sectionalised Double Bus, One and a Half Circuit Breaker Arrangement, Ring Main),Power Transformers, Circuit Breakers, Isolators, Earthing Switches, InstrumentTransformers, Surge or Lightning Arresters, Communication Devices (Power- Line Carrier) and Line Trap.

Module-3

Electrical Machine Assembly Drawings Using Design Data, Sketches or Both:
Transformers - Sectional Views Of Single And Three Phase Core And Shell Type Transformers.

Module-4

Electrical Machine Assembly Drawings Using Design Data, Sketches or Both:
D.C. Machine - Sectional Views of Yoke with Poles, Armature and Commutator dealt separately.

Module-5

Electrical Machine Assembly Drawings Using Design Data, Sketches or Both:
Alternator – Sectional Views of Stator and Rotor dealt separately.

Important Links:

1. Click here to download Complete 5 modules notes

Course Outcomes: At the end of the course the student will be able to:

• Develop armature winding diagram for DC and AC machines
• Develop a Single Line Diagram of Generating Stations and substation using the standard symbols.
• Construct sectional views of core and shell types transformers using the design data
• Construct sectional views of assembled DC and AC machine and their parts using the design data or the sketches

Question paper pattern:

 The question paper will have two parts, PART – A and PART – B.
 Each part is for 50 marks.
 Part A is for Modules 1 and 2.
 Questions 1 and 2 of PART - A will be only on DC windings or only on AC windings. Students have to answer any one of them. The marks prescribed is 25.
 Question 3 of PART – A covering module 2 is compulsory. The marks prescribed is 15.
 Part B is for Modules 3, 4 and 5.
 • Questions 4 and 5 will cover any two modules of modules 3, 4 and 5. Students have to answer
 any one of them. The marks prescribed is 40.

Reference Books

1 A course in Electrical Machine design A. K. Sawhney DhanpatRai 6th Edition, 2013
Electrical Engineering Drawing K. L. Narang Satya Prakashan 2014