Power Transformers

Course Number - EMS200

Course Number - EMS200

Course Purpose

This course provides information on the concepts associated with transformers, transformer function, transformer design, transformer maintenance, transformer faults, and transformer inspecting and testing in accordance with NFPA NEC 70 standards.



After completing this course, students should be able to perform the following tasks:
  • Identify and discuss safety issues relating to transformers

  • Explain the theory of transformer operations

  • List and describe the types of transformers

  • Describe the construction and nameplate information of a transformer

  • Demonstrate different types of transformer tap connections

  • Demonstrate proper inspection techniques for transformers

  • Demonstrate proper maintenance techniques for transformers

Who Should Attend

This course is designed for electrical maintenance technicians.





Student Materials

To enhance and facilitate the students’ learning experiences, the following materials are provided as part of the course package:

  • Student Manual -  includes the key concepts, definitions, examples, and activities presented in this course

  • Lab Book - provides learning activities and hands-on practice. Solutions are included after each exercise for immediate feedback.

Hands-On Practice

Throughout this course, you will have the opportunity to practice the skills you have learned through a variety of hands-on exercises. These exercises focus on the skills introduced in each lesson.


You will also have the opportunity to combine and practice groups of key skills by completing multiple integrated practices during the course.


Next Learning Level

Once you have mastered the skills covered in this course, you may want to attend specific training, such as: Motor Theory course (EMS-105)


Course Length

This is a three-day course.

Course Agenda

Day 1

  • Explaining Induction andT ransformer Action

  • Distinguishing Transformer Types

  • Describing Transformer Components

  • Detailing Three Phase Circuits

  • Wiring Single Phase and Three Phase Configurations

  • Interpreting Nameplate Data

Day 2

  • Following Safety Precautions

  • Changing Taps

  • Sizing Transformers

  • Performing Maintenance and Inspections

Day 3

  • Identifying Transformer Malfunctions

  • Troubleshooting and Repairing Transformers

  • Final Lab

  • Review

  • Written Exam

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