Welcome to Mastering Electrical Transformers: Theory, Construction, Types, and Testing—a comprehensive e-learning program designed to provide you with in-depth knowledge and practical skills essential for the safe, efficient, and reliable operation of power transformers. As one of the most vital components in any electrical power system, a strong understanding of transformers is critical for engineers, technicians, and professionals involved in electrical infrastructure and diagnostics.

This course offers a well-structured exploration of transformer principles, constructional details, classifications, performance characteristics, and diagnostic testing procedures. It is ideal for professionals seeking to enhance their technical competencies in transformer design, maintenance, and condition assessment.

Key Topics Covered:

• Fundamentals of Transformers

  • Working principle

  • Importance, advantages, limitations, and applications

• Construction and Components

  • Core, windings, insulation systems

  • Cooling mechanisms, transformer tank, conservator tank

  • Breather unit, Buchholz relay, explosion vent

  • Terminals, bushings, and surge arresters

• Transformer Classification

  • Core type and shell type

  • Power, distribution, and instrument transformers

  • Current and potential transformers (CT & PT)

  • Auto transformers, three-phase transformers

  • Ideal and isolation transformers

• Transformer Losses

  • Copper and core losses

  • Hysteresis and eddy current losses

  • Stray and dielectric losses

• Testing and Diagnostics

  • Open circuit and short circuit tests

  • Oil Breakdown Voltage (BDV) test

  • Dissolved Gas Analysis (DGA), Partial Discharge (PD) testing

  • Dielectric loss test, High Potential (Hipot) test

  • Insulation Resistance (IR) test, polarity test

  • Winding resistance test, vector group test

  • Transformer Turns Ratio (TTR) test, acidity test, furan testing

• Additional Topics

  • Practical test sets and exercises

  • Transformer earthing and surge protection

  • Maintenance checklists and best practices

Fundamentals of Transformers

• Working principle

• Importance, advantages, limitations, and applications

Working principle

Importance, advantages, limitations, and applications

Construction and Components

• Core, windings, insulation systems

• Cooling mechanisms, transformer tank, conservator tank

• Breather unit, Buchholz relay, explosion vent

• Terminals, bushings, and surge arresters

Core, windings, insulation systems

Cooling mechanisms, transformer tank, conservator tank

Breather unit, Buchholz relay, explosion vent

Terminals, bushings, and surge arresters

Transformer Classification

• Core type and shell type

• Power, distribution, and instrument transformers

• Current and potential transformers (CT & PT)

• Auto transformers, three-phase transformers

• Ideal and isolation transformers

Core type and shell type

Power, distribution, and instrument transformers

Current and potential transformers (CT & PT)

Auto transformers, three-phase transformers

Ideal and isolation transformers

Transformer Losses

• Copper and core losses

• Hysteresis and eddy current losses

• Stray and dielectric losses

Copper and core losses

Hysteresis and eddy current losses

Stray and dielectric losses

Testing and Diagnostics

• Open circuit and short circuit tests

• Oil Breakdown Voltage (BDV) test

• Dissolved Gas Analysis (DGA), Partial Discharge (PD) testing

• Dielectric loss test, High Potential (Hipot) test

• Insulation Resistance (IR) test, polarity test

• Winding resistance test, vector group test

• Transformer Turns Ratio (TTR) test, acidity test, furan testing

Open circuit and short circuit tests

Oil Breakdown Voltage (BDV) test

Dissolved Gas Analysis (DGA), Partial Discharge (PD) testing

Dielectric loss test, High Potential (Hipot) test

Insulation Resistance (IR) test, polarity test

Winding resistance test, vector group test

Transformer Turns Ratio (TTR) test, acidity test, furan testing

Additional Topics

• Practical test sets and exercises

• Transformer earthing and surge protection

• Maintenance checklists and best practices

Practical test sets and exercises

Transformer earthing and surge protection

Maintenance checklists and best practices

Learning Outcomes:

By the end of this course, you will be able to:

• Comprehend the working and design aspects of various transformer types

• Perform essential transformer tests and interpret diagnostic results

• Apply maintenance strategies to enhance performance and operational safety

• Identify and mitigate potential issues to prolong transformer lifespan and reliability

Comprehend the working and design aspects of various transformer types

Perform essential transformer tests and interpret diagnostic results

Apply maintenance strategies to enhance performance and operational safety

Identify and mitigate potential issues to prolong transformer lifespan and reliability

Who Should Enroll:

This course is tailored for electrical engineers, maintenance professionals, technicians, and anyone involved in transformer operations, diagnostics, or power system management. Whether you're expanding your foundational knowledge or sharpening your technical expertise, this program offers the tools and insights needed to advance in the field.