Electrical Engineering › Section M · Transformers and polyphase systems › Topic M.8
Delta-connected systems
Connect three coils or three loads end to end in a closed triangle and you have a delta. Here the voltages are the simple part, since phase and line voltages are equal, while the currents pick up the factor of √3 and the 30° shift.
In this topic
- Connecting the coils in delta
- Voltages: phase equals line
- Currents: line current from two phases
- Why most generators are Y-connected
- The Δ-Δ system
- Worked example: a balanced Δ-Δ load
- The Δ-Y system
- Worked example: a balanced Δ-Y load
- One phase is enough when balanced
- Common mistakes to avoid
- Key takeaways
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