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Three Phase Circuits

Three Phase Circuits. Tuesday, September 13 th , 2005. Today. Single-Phase Three-Wire Systems Three-Phase Wye-Wye Systems Delta Connection Wye-Delta Transformations. Single Phase Three-Wire Systems. +. or. Example. Find I 1 , I 2 and I nN !. The determinant is.

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Three Phase Circuits

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  1. Three Phase Circuits Tuesday, September 13th, 2005

  2. Today • Single-Phase Three-Wire Systems • Three-Phase Wye-Wye Systems • Delta Connection • Wye-Delta Transformations

  3. Single Phase Three-Wire Systems

  4. + or

  5. Example Find I1, I2 and InN !

  6. The determinant is Solving by matrix inversion

  7. Three-Phase Wye-Wye Systems Positive or abc sequence Negative or acb sequence

  9. Delta Connection

  10. Wye-Delta Transformations

  11. Find the currents IaA, IbB, and InN in this symetric single phase three wire systems. Sketch in phasor diagram !

  12. In the Wye-Delta system shown, the source is positive sequence with Van = 100 0 Vrms and the phase impedance is Zp = 3 – j4 . Find the line voltage VL, the line current IL and the power delivered to the load !

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