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Star-Star and Star-Delta Transformers | What Is 3-Phase Power? -- Part 3

In 3-phase electrical power systems, transformers are used to change both voltage magnitude and voltage phase. Common configurations include Star and Delta windings. Understanding how these connection options affect voltage and current is fundamentally important for AC electrical system analysis and operation.

You will learn:
- How a transformer can change voltage level between primary and secondary connections
- The impact that Star and Delta connections have on voltage magnitude and phase
- The difference between D1 and D11 Delta connections
- Some practical considerations for a certain connection choice

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