Electrical Drawings and Schematics

This course explains the need for the development of engineering drawings as part of the problem solving for the engineers and their relevance to the various departments of an engineering organization. It also explains the various steps involved in the development of drawings; their release and control with reference to the accepted standards

The course explains the various components of a drawing, the common information recorded on drawing and some simple rules pertaining to creation of engineering drawings. It also explains the procedures for planning the layout of a drawing and the concepts of scales, grid referencing and revision marking for drawings.

The necessity of development of worldwide standards for drawing symbols, the necessity of development of company specific standards, the requirement of non-standard symbols by drawing offices, the purpose and applications of electrical line diagrams, the conventions and symbols used in line diagrams and provides examples and practical lessons for reading and interpretation of single line diagrams will be explained.

Course Objectives

• To provide the reader with an overview of the relevance of drawings in an engineering environment and the purpose served by different types of drawings.
• To familiarize the reader briefly with the history of origin of worldwide standards in electro technology and also the standards and procedures usually followed by organizations for development and control of drawings.
• To familiarize the reader with the common information recorded on an engineering drawing and the features of an engineering drawing
• To familiarize the reader with the different sizes, scales, layouts and revision marking standards for engineering drawings
• To familiarize the readers with the symbols used for drawings in electro technology as per international standards and also the common conventions for use of line types for various purposes and services.
• To explain the need for development of company specific standards and the necessity of use of non-standard symbols at times
• To familiarize the reader with the purpose and application of one line and three line diagrams.
• To familiarize the readers with the techniques for preparation, reading and interpretation of single line diagrams with the help of practical examples and questionnaires
• To familiarize the readers with the purpose and application of schematic diagrams.
• To familiarize the readers with the techniques for reading and interpretation of practical examples of schematic diagrams spread over a number of sheets with cross-referencing between coils and contacts
• To familiarize the readers with the basics of logic diagrams with their purpose and application.
• To familiarize the readers with the techniques for understanding and interpreting logic diagrams
• To familiarize the readers with the purpose and application of different types of cabling and wiring diagrams.
• To familiarize the readers with examples of various types of cabling diagrams
• To familiarize the readers with the purpose and application of different types of electrical layouts such as electrical floor plans, lighting layouts, earthing layouts
• To familiarize the readers with examples of various types of electrical layout plans, drawings and schedules.

Who Should Attend?

This course is intended for Electrical Engineers & Supervisors, who work in electrical constructions, maintenance in Utilities & Industries Electrical Networks.

Course Outline

Module 1: Engineering Drawings for Electrical Engineers– An Introduction 1
1.1 Drawings - their relevance to engineering
1.2 Origin of worldwide standards in electro-technology
1.3 Purposes served by different types of drawings
1.4 Standards in a drawing office
1.5 Organization of a typical drawing office
1.6 Printing, distribution and control of copies
1.7 Summary

Module 2: Components of a Drawing, Drawing Sizes and Scales
2.1 Typical engineering drawings
2.2 Various categories of electrical drawings
2.3 Planning your drawing
2.4 Title block in a drawing and what it should contain
2.5 Legend block
2.6 Bill of materials block
2.7 Drawing notes block
2.8 Revision history, revision numbering and use of revision marks
2.9 Summary

Module 3: Symbols Used in Electro-technology and Governing Standards
3.1 Types of drawings that need symbols
3.2 Symbols as per electro-technology standards
3.3 Use of non standard symbols
3.4 Use of color and line types in representing various services
3.5 Company standards for drawings
3.6 Summary

Module 4: Single Line and Three Line Diagrams
4.1 Purpose
4.2 Typical examples
4.3 The differences between single line and the 3-line diagram
4.4 Applications
4.5 Conventions
4.6 Summary
Exercises

Module 5: Schematic Diagrams
5.1 Purpose
5.2 Typical examples
5.3 Control devices – electromechanical relays and contactors
5.4 Use of symbols
5.5 Applications
5.6 Schematics spread over a number of sheets
5.7 Cross referencing between coils and contacts
5.8 Summary

Module 6: Logic Diagrams
6.1 Purpose
6.2 Logic gates
6.3 Typical examples
6.4 Symbols
6.5 Applications
6.6 Logic diagrams spread over a number of sheets
6.7 Cross referencing
6.8 Summary

Module 7: Cabling and Wiring Drawings
7.1 Purpose
7.2 Sub types of cabling and wiring drawings
7.3 Conventions used
7.4 Summary
Exercises

Module 8: Layout drawings
8.1 Purpose
8.2 Conventions used for layout drawings
8.3 Sub types of layout drawings
8.4 Applications of layout drawings
8.5 Summary
Exercises

Module 9: Advances arising from Computer Aided Drafting (CAD)
9.1 Drawing office revolution by CAD and the role of PC based CAD applications
9.2 2D and 3D applications and links to CAM
9.3 Drawing to true dimensions in CAD applications
9.4 Use of symbols, attributes and symbol libraries
9.5 Automated bill of material generation from a CAD drawing
9.6 Information sharing on multi-disciplinary drawing
9.7 Concept of layers and their use in sharing information
9.8 Automation of drawing through programming
9.9 Linking imagery with drawings – GIS related applications
9.10 Summary

Module 10: Management of drawings
10.1 Planning and assigning of drawings
10.2 Need for drawing numbering standards
10.3 Drawing process flow
10.4 Revision control and ownership of drawing
10.5 Comments and their marking
10.6 Drawing management system for work flow control
10.7 On-line distribution of drawings – the end of the era of paper drawings – the future
10.9 Summary

Course Methodology

A variety of methodologies will be used during the course that includes:

• (30%) Based on Case Studies
• (30%) Techniques
• (30%) Role Play
• (10%) Concepts
• Pre-test and Post-test
• Variety of Learning Methods
• Lectures
• Case Studies and Self Questionaires
• Group Work
• Discussion
• Presentation

Course Fees

This rate includes participant’s manual, Hand-Outs, buffet lunch, coffee/tea on arrival, morning & afternoon of each day.

Course Timings

Daily Course Timings
08:00 - 08:20       Morning Coffee / Tea
08:20 - 10:00       First Session
10:00 - 10:20       Coffee / Tea / Snacks
10:20 - 12:20       Second Session
12:20 - 13:30       Lunch Break & Prayer Break
13:30 - 15:00       Last Session