3-Lesson_Notes_Lecture3_ee205

# 3-Lesson_Notes_Lecture3_ee205 - EE 205 Dr Chokri Belhaj...

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EE 205 Dr. Chokri. Belhaj Ahmed - 1 - Electric Circuits II Balanced Three Phase Circuits Lecture # 03

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EE 205 Dr. Chokri. Belhaj Ahmed - 2 - Objective of this lecture is as follows : ± Transformation from Delta to Why. ± Transformation from Why to Delta. ± The single-phase equivalent circuit. ± The line and phase current quantities for a Delta circuit. ± Complete Analysis of Y- circuit. After finishing this lecture, you should be able to : ± Transform the three-phase circuit Y to and vice versa. ± Extract the single-phase equivalent circuit for Y- three-phase circuit. ± Deduce the line and phase current quantities for connection. ± Identify the difference between delta and why currents and voltage relations. ± Conduct a complete analysis for Y- circuit.
EE 205 Dr. Chokri. Belhaj Ahmed - 3 - Transformation from Delta to Why Starting from a Delta connection to reach Wye Connection Figure 13 Delta to Wye Transformation circuits

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EE 205 Dr. Chokri. Belhaj Ahmed - 4 - Transformation from Delta to Why (Cont) . AB AC A A BB C A C Z Z Z Z ZZ = ++ . BC B A CA C Z ZZZ = . C A C A C Z Z Z Z = ± In case where A BA CB C = == ± Then 2 1 3 3 A Z Z Z Z = = ± So we can deduce that 1 3 Y =
EE 205 Dr. Chokri. Belhaj Ahmed - 5 - Transformation from Why to Delta Starting from a Why connection to reach Delta Connection Figure 14 Wye to Delta to Transformation circuits

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EE 205 Dr. Chokri. Belhaj Ahmed - 6 - Transformation from Why to Delta (Cont) BB A CA C AB
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3-Lesson_Notes_Lecture3_ee205 - EE 205 Dr Chokri Belhaj...

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