Transformer School

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Transformer School

Transformer School

Date: December 12-14, 2018
  • 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

Minnesota Municipal Utilities Association, along with our partners, Minnesota Rural Electric Association (MREA) and American Public Power Association (APPA), is pleased to offer our annual Transformer School. The Transformer School will focus on three-phase transformer connection. In addition, we'll offer a Pre-Conference covering basic single-phase transformer connections and theory.

Participants will be challenged by the course instruction and hands-on station work that can benefit any utility! The various stations are designed to simulate "real world" scenarios, without the real-world dangers. Working in small groups, participants benefit from collaborating and further develop troubleshooting methods that can help maintain your utility's reliability.

Scott Meinecke, Job Training & Safety Instructor with Iowa Association of Electric Cooperatives, will again be the instructor for these courses.

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 12
12:00-1:00  Registration
1:00-4:00  Classroom Three-Phase Transformer Connections

Thursday, December 13
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 14
8:30-12:00  Classroom and Hands-On Training
12:00  Conference Ends

What to Bring

Class attendees will be required to bring their own personal protective equipment, 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

$465 per person for members; $690 per person for non-members.
All fees increase $50 on November 12, 2018.
Deadline to register is November 21.

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

Cancellations / Refunds

MMUA will issue a refund (less $30 processing fee per person) provided MMUA is notified of the cancellation by 4:30 pm on November 21, 2018. No refunds after November 21.

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.


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.


Contact Theresa Neddermeyer by email or phone 763.551.1230.

This information is available in a printable format as well.


Thank You, Annual Sponsors

View all Annual Sponsors

Video Captures 2016 Public Power Lineworkers Rodeo

We now have a 4-minute rodeo recap video of the 2016 Public Power Lineworkers Rodeo, live on the MMUA YouTube channel.  It features great footage and interviews with a number of key players in the event.  The April 2 event was hosted by Shakopee Public Utilities and MMUA, and brought together lineworkers from across the country. Watch this video and enjoy reliving that amazing day.  Be sure to bundle up before you click!