Transformer Connections
Interactive

Transformer Connections

Martech
Updated Jan 21, 2021

 When you complete this lesson, you will be able to identify and explain how to make the most common types of connections for single-phase and three-phase transformers. You will be able to calculate the value of phase voltage and current, as well as line voltage and current.

• Explain how a dual-voltage, single-phase transformer is wound and connected

• Identify the primary and secondary transformer lead marking

• Describe the relationship between each phase of three-phase voltage

• Discuss three-phase, delta-connected lines and: – Phase voltage – Phase current

• Discuss three-phase, wye-connected lines and: – Phase voltage – Phase current

• Explain the function of the Y-point in a wye-connected transformer

• Describe an open-delta connection and discuss the amount of current it can provide

• Identify a scenario where a d