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Electrical Troubleshooting and Repairs: Using Schematic Diagrams

By: Angelus Consulting and Research Limited  

Lagos State, Nigeria

22 - 25 Nov, 2022  4 days

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NGN 200,000

Venue: 70b Olorunlogbon Street, Anthony Village, Lagos State, Nigeria.

This course equips engineering personnel with the right approach to troubleshooting without guessing or using trial and error method. Participants will also learn about the operation of electrical control components, testing and interpretation of technical specification on these components.

Learning Objectives

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

  • Measure electrical parameters
  • Understand Single line diagrams
  • Understand Three lines Diagrams
  • Identify, use and test electrical control components
  • Understand power and control of three phase motor control schematic diagrams.
  • Understand 5 step approach to troubleshooting
  • Troubleshoot and rectify electrical faults using schematic drawings.
  • Identify, use and test electrical control components
  • Demonstrate practical troubleshooting skill 


Lectures complemented by hands‐on exercises using various schematic/blueprint drawings of various industrial layouts and Troubleshooting Software.


  • Introduction to electrical troubleshooting using schematic diagram
  • Legends interpretation
  • Electrical Symbols identification / designators
  • Power symbol
  • Control symbol
  • Switches
  • Sensors
  • Meters
  • Output devices
  • Basic layouts
  • Schematic diagram
  • Wiring diagram
  • Block diagram etc
  • Single‐Line Diagram
  • Purpose of a single line diagram
  • Three‐Line Diagram
  • Practical exercise using schematic diagrams  
  • Electrical components identification, operation and testing
  • Contactors
  • Overload relay
  • Timer relay
  • Photo sensors
  • Proximity sensors
  • Push buttons and switches
  • Three phase induction motor
  • MCB/MCCB etc
  • Electrical measuring instrument
  • DMM
  • Phase sequencer
  • Clamp meter
  • Merger tester
  • Five step approach for effective troubleshooting
  • Fault categories
  • Short circuit
  • Open circuit
  • Troubleshooting using simulator
  • Motor control circuits
  • Basic control circuits
  • Sensors and transducers circuits
  • Troubleshooting Practice
70b Olorunlogbon Street, Anthony Village, Lagos State, Nigeria. Nov 22 - 25 Nov, 2022

Registration: 09:00:am - 04:00:am

NGN 200,000.00
(Convert Currency)

Gideon +2349087363262

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