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Delta and Wye 3-Phase Circuits
15 questions By Tony R. Kuphaldt
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Question 4 of 15
Calculate all voltages, currents, and total power in this balanced Delta-Delta system:
- Eline =
- Iline =
- Ephase(source) =
- Iphase(source) =
- Ephase(load) =
- Iphase(load) =
- Ptotal =
Reveal answer- Eline = 230 V
- Iline = 7.967 A
- Ephase(source) = 230 V
- Iphase(source) = 4.6 A
- Ephase(load) = 230 V
- Iphase(load) = 4.6 A
- Ptotal = 3.174 kW
Notes:Be sure to ask your students to describe how they arrived at the answers to this question. There is more than one place to start in determining the solution here, and more than one way to calculate some of the figures. No matter how your students may have approached this question, though, they should all obtain the same answers.
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Question 5 of 15
Calculate all voltages, currents, and total power in this balanced Y-Y system:
- Eline =
- Iline =
- Ephase(source) =
- Iphase(source) =
- Ephase(load) =
- Iphase(load) =
- Ptotal =
Reveal answer- Eline = 13.8 kV
- Iline = 5.312 A
- Ephase(source) = 7.967 kV
- Iphase(source) = 5.312 A
- Ephase(load) = 7.967 kV
- Iphase(load) = 5.312 A
- Ptotal = 126.96 kW
Notes:Be sure to ask your students to describe how they arrived at the answers to this question. There is more than one place to start in determining the solution here, and more than one way to calculate some of the figures. No matter how your students may have approached this question, though, they should all obtain the same answers.
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Question 6 of 15
Calculate all voltages, currents, and total power in this balanced Delta-Y system:
- Eline =
- Iline =
- Ephase(source) =
- Iphase(source) =
- Ephase(load) =
- Iphase(load) =
- Ptotal =
Reveal answer- Eline = 2400 V
- Iline = 4.619 A
- Ephase(source) = 2400 V
- Iphase(source) = 2.667 A
- Ephase(load) = 1385.6 V
- Iphase(load) = 4.619 A
- Ptotal = 19.2 kW
Notes:Be sure to ask your students to describe how they arrived at the answers to this question. There is more than one place to start in determining the solution here, and more than one way to calculate some of the figures. No matter how your students may have approached this question, though, they should all obtain the same answers.
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