The purpose of this course is to teach how common types of overhead transformers can be connected together. Both single-phase and three-phase transformers are covered, but the emphasis is on three-phase connections of three single-phase transformers. The course presents connection theory using phasor diagrams and demonstrates how each of the connections is made.

At the conclusion of this course, participants should be able to describe and demonstrate how to make three-phase connections in all of the following configurations: delta-wye, wye-delta, alternative delta-delta, and alternative wye-delta. Participants should also be able to show these connections using phasor diagrams. They should be able to demonstrate how to connect transformers to form an open bank in the configurations of delta-delta and wye-delta.