Transformer School

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Transformer School

Transformer School

Date: December 11-13, 2019
  • Day 1: 12:00 pm - 4:00 pm
  • Day 2: 8:30 am - 4:00 pm
  • Day 3: 8:30 am - 12:00 pm
Location: MMUA Training Center, Marshall, MN
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Three-Phase Transformer Connections

Phase angle. Vectors. Loading transformers properly.

These are some complicated principles. Which is why we bring in Scott Meinecke to instruct. Scott is with the Iowa Association of Electric Cooperatives and has more than 25 years experience as an instructor on this topic. Scott has a way of explaining things so you can understand it and he keeps everyone engaged.

At this workshop, you'll take Scott's instruction and apply it to the bank of miniature transformers. Working in small groups, you'll troubleshoot a variety of single phase and 3-phase scenarios. Once you've fixed the problem, you can test it and see first hand what worked and what didn't work!

The Transformer School offers the ultimate combination of classroom and hands-on training that can help improve your understanding of the inner workings of a transformer, appropriate installations and applications for maximum reliability. In addition, we offer a Pre-Conference covering basic single-phase transformer connections and theory. (Separate registration required.)

This program can benefit any lineworker—wherever you are at in your linework career.

What You Will Learn

The three-phase course will start with the basics of transformers, including turns ratios, polarities, calculations, connections, and troubleshooting. Participants will learn about the basic three-phase systems with some basic phasor diagrams and explain the relationship of the phasor to the transformer itself.

In the hands-on portion of the course, participants will work with miniature transformers that are energized and will blow fuses, in order to experience what happens when something is wired incorrectly.

The class will continue to build on the miniature transformer banks and work on troubleshooting. Additionally, they will discuss motor rotation as it relates to three-phase systems; as well as ways to prevent voltage surge when switching a three-phase bank.

Upon completion of the Three-Phase Transformer Connections class, participants should have a good understanding of the following topics, related to transformers:                               

  • Basic Three-Phase Connections
  • Delta Connection                                               
  • Wye Connection                                                
  • Open Delta Connection
  • Three-Phase Troubleshooting


Wednesday, December 11
12:00-1:00  Registration
1:00-4:00  Classroom Three-Phase Transformer Connections

Thursday, December 12
8:30-12:00  Classroom and Hands-On Training
12:00-1:00  Lunch Served at Training Center
1:00-4:00  Classroom and Hands-On Training

Friday, December 13
8:30-10:00  Oil Spill Response, Jim Thompson, T & R Service Company
10:00-12:00  State & Federal Regulations on Oil in Transformers, Jim Thompson, T & R Service Company

* Schedule subject to change without notice.

What to Bring

Registrants must bring their own personal protective equipment as well as other items, including:

  • Arc Flash Shield and Hard Hat
  • Safety Glasses
  • Secondary Rubber Gloves
  • FR Clothing
  • Appropriate Footwear
  • Volt/Amp Meter
  • Calculator
  • Notebook and Pen/Pencil

Certificate of Achievement

A certificate of achievement will be provided showing the hours of attendance acquired. Certificates will be emailed after the course.

Registration Fees

Member Rate: $465 per person
Non-Member Rate: $690 per person

All fees increase $50 on November 10, 2019.
Deadline to register is November 20.

Registration fee includes course tuition, materials, Thursday lunch, refreshment breaks and a certificate of achievement. If registering for the Pre-Conference, lunch on Wednesday is also included.

Cancellations / Refunds

MMUA charges a $30 processing fee per person for registrations cancelled on/by November 20, 2019. MMUA must be notified by 4:30 pm on November 20 to qualify.

Hotel / Motel Information - Marshall, MN

For a map of hotels in Marshall, click HERE. The AmericInn and Ramada offer special pricing for participants. Just ask for MMUA's reduced rate when making your reservation. We recommend making your hotel reservation as soon as possible as availability cannot be guaranteed.


By registering for this event I/we, the registered attendee(s), authorize Minnesota Municipal Utilities Association (MMUA) to photograph me at this event and use such photographs in MMUA marketing materials (both electronic and print). I understand that I will not be paid for giving this consent. Likewise, anyone who attends as a substitute for a registered individual understands MMUA may take their photograph and utilize the photograph in marketing materials, and the individual(s) grants consent to MMUA with the understanding that they will not be paid.


Contact Theresa Neddermeyer by email or phone 763.551.1230.

This information is available in a printable format as well.


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