Transformers and Instrument Transformers

SUB 105 'Transformers and Instrument Transformers' is a 3-credit course designed for technicians entering the electrical power industry. Students will gain foundational knowledge of power transformers, including their fundamental theory, types, construction, and cooling methods. The curriculum delves into critical maintenance aspects such as transformer oil diagnostics, testing procedures, and common failure modes. A significant portion of the course is dedicated to instrument transformers, specifically current transformers (CTs) and potential transformers (PTs), covering their applications in metering, protection, and control circuits. Through theoretical instruction and hands-on laboratory experiences, students will develop the skills necessary to safely install, operate, and troubleshoot these vital components within electrical substations and industrial settings, adhering to industry best practices and safety standards.

InstructorJacob Calhoun

Prerequisites

SUB 101

Course outline

Lectures, virtual labs, and graded assignments — completed in your browser.

01Lesson 1: Introduction to Transformers and Magnetic Principleslecture

02Lesson 2: Power Transformer Construction and Componentslecture

03Lesson 3: Transformer Operating Principles and Equivalent Circuitslecture

04Hands-on Lab: Power Transformer Turns Ratio and Polarity Testinglab

05Lesson 5: Transformer Losses, Efficiency, and Cooling Methodslecture

06Lesson 6: Transformer Insulation and Dielectric Propertieslecture

07Lesson 7: Transformer Oil Diagnostics and Maintenancelecture

08Hands-on Lab: Transformer Oil Sampling and Basic Testinglab

09Lesson 9: Introduction to Instrument Transformers: CTs and PTslecture

10Lesson 10: Current Transformers (CTs): Types, Characteristics, and Applicationslecture

11Hands-on Lab: CT Saturation and Ratio Verificationlab

12Lesson 12: Potential Transformers (PTs): Types, Characteristics, and Applicationslecture

13Lesson 13: Transformer Protection, Monitoring, and Safetylecture

14Capstone Service Project: Transformer System Inspection and Analysisassignment

Syllabus

["Week 1: Lesson 1: Introduction to Transformers and Magnetic Principles","Week 2: Lesson 2: Power Transformer Construction and Components","Week 3: Lesson 3: Transformer Operating Principles and Equivalent Circuits","Week 4: Hands-on Lab: Power Transformer Turns Ratio and Polarity Testing","Week 5: Lesson 5: Transformer Losses, Efficiency, and Cooling Methods","Week 6: Lesson 6: Transformer Insulation and Dielectric Properties","Week 7: Lesson 7: Transformer Oil Diagnostics and Maintenance","Week 8: Hands-on Lab: Transformer Oil Sampling and Basic Testing","Week 9: Lesson 9: Introduction to Instrument Transformers: CTs and PTs","Week 10: Lesson 10: Current Transformers (CTs): Types, Characteristics, and Applications","Week 11: Hands-on Lab: CT Saturation and Ratio Verification","Week 12: Lesson 12: Potential Transformers (PTs): Types, Characteristics, and Applications","Week 13: Lesson 13: Transformer Protection, Monitoring, and Safety","Week 14: Capstone Service Project: Transformer System Inspection and Analysis"]