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1. An ideal transformer is shown in Figure 6.12. Use this model for a distribution transformer from VH = 24 kV to Vx = 240 V (RMS). This is, of course, a single phase transformer and is of the type commonly used to provide the 240 V service commonly used in the United States. It is center-tapped to provide 120 V for branch circuits. Assume this transformer is rated at 24 kVA. (a) What are the current ratings Ix and IH? (b) If the secondary ('X') side has 26 turns, how many turns does the primary ('H') side have? (c) If this transformer is loaded by a resistor of value R, what value of R results in the transformer being loaded to its rating? (d) If the secondary is loaded by a resistor of value R, what is the impedance looking into the primary side? 'H ¹x Vx Figure 6.12 Ideal transformer

1. An ideal transformer is shown in Figure 6.12. Use this model for a distribution transformer from VH = 24 kV to Vx = 240 V (RMS). This is, of course, a single phase transformer and is of the type commonly used to provide the 240 V service commonly used in the United States. It is center-tapped to provide 120 V for branch circuits. Assume this transformer is rated at 24 kVA. (a) What are the current ratings Ix and IH? (b) If the secondary ('X') side has 26 turns, how many turns does the primary ('H') side have? (c) If this transformer is loaded by a resistor of value R, what value of R results in the transformer being loaded to its rating? (d) If the secondary is loaded by a resistor of value R, what is the impedance looking into the primary side? 'H ¹x Vx Figure 6.12 Ideal transformer

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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1. An ideal transformer is shown in Figure 6.12. Use this model for a distribution transformer from VH = 24 kV to Vx = 240 V (RMS). This is, of course, a single phase transformer and is of the type commonly used to provide the 240 V service commonly used in the United States. It is center-tapped to provide 120 V for branch circuits. Assume this transformer is rated at 24 kVA. (a) What are the current ratings Ix and IH? (b) If the secondary ('X') side has 26 turns, how many turns does the primary (H') side have? (c) If this transformer is loaded by a resistor of value R, what value of R results in the transformer being loaded to its rating? (d) If the secondary is loaded by a resistor of value R, what is the impedance looking into the primary side? ¹H 'x + Vx Figure 6.12 Ideal transformer
Transcribed Image Text:1. An ideal transformer is shown in Figure 6.12. Use this model for a distribution transformer from VH = 24 kV to Vx = 240 V (RMS). This is, of course, a single phase transformer and is of the type commonly used to provide the 240 V service commonly used in the United States. It is center-tapped to provide 120 V for branch circuits. Assume this transformer is rated at 24 kVA. (a) What are the current ratings Ix and IH? (b) If the secondary ('X') side has 26 turns, how many turns does the primary (H') side have? (c) If this transformer is loaded by a resistor of value R, what value of R results in the transformer being loaded to its rating? (d) If the secondary is loaded by a resistor of value R, what is the impedance looking into the primary side? ¹H 'x + Vx Figure 6.12 Ideal transformer
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