Electrical Drawings and Control Circuits

Introduction:

This course begins with the development of various relevant drawings and symbols representing devices that are vital in all electrical installation to ensure continuity and efficient operations. The primary and fundamental tool for troubleshooting and maintenance of an electrical installation is to understand and interpret electrical drawings and ladder diagrams.

Electrical symbols, schematic, and wiring diagrams facilitate the operations of the electrical installation equipment. This program will cover all these aspects of electrical blueprint reading and the tracing of circuits. It will familiarise engineers and technicians with the various standards and practices, also, to understand the power flow and equipment installed. As fitted diagrams and ladder diagrams will we presented to correlate with the electrical equipment installed. Tracing of electrical circuits with the relevant wiring diagrams will be demonstrated to ensure correct methods of troubleshooting

Targeted Groups:

Electrical Engineers
Electrical Supervisors
Maintenance Technicians
Managers in-charge of electrical installations
Project Engineers

Course Objectives:

At the end of this course the participants will be able to:

Describe the various types of electrical drawings
Appreciate the importance of single line diagrams
Analyze the various electrical ladder drawings
Explain the operation of the electrical equipment using wiring and schematic diagrams
Recognize the symbols in electrical drawings

Targeted Competencies:

The interpretation and understanding of standard electrical symbols
The characteristics of single line diagrams
The importance of ladder diagrams
Using diagrams for circuit tracing
Troubleshooting electrical system using diagrams

Course Content:
Unit 1: Types of Drawings and Symbols:

Importance and Relevance of Drawings
Categories of Electrical Drawing and their Characteristics
Purposes served by Different Type of Electrical Drawings
International Electrical Symbols and Drawings
Applications and Functions of Numerical Relays
Importance of CTs and VTs Information in Electrical Drawings

Unit 2: Interpretation and Significance of Single Line Diagrams:

Onset of a Single Line Diagram
Importance of Single Line Diagrams
Standardized Drawing Symbols
Protective Devices Coordination in Single Line Diagrams
Fault Current Calculations with Information from the Single Line Diagram
Troubleshooting and Electrical Installation with the Relevant Diagrams

Unit 3: Ladder Diagrams Interpretation:

Types of Ladder Diagram
Generic Electrical Equipment Ladder Diagrams
Designing Control Circuits
Interlock Control Circuits
Protective Relays and Timers Ladder Diagrams
Fail-Safe Designs

Unit 4: Schematic and Control Circuits and its Merits:

VFD Schematics and its Operation related to Controlling Circuits
UPS Power Supply Schematic Diagram Components Functionalities
Reading and Tracing AC Input Diagrams and its Significance
Identify Components in the Rectifier, Inverter and AC Outputs Schematic Diagrams
Types of Protection Relays Schematics, Wiring, Operation and Functional Diagrams
Motor Installation and Control Circuits