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2. Utilities may use the Open-Wye/Open-Delta connection for three-phase transformers when maintenance is needed. The transformer in Figure P4 is serving both single-phase and three-phase loads. ABC N 12.47kV 120/240V a bc n IA T1 Ia H1 x3 x2 In H2 x1 IN Ib H2 x3 IB Ic H1 х1 Г2 9KVA single-phase PF=1.0 80KVA three-phase PF=0.91 (lag) Figure P4 Open-Wye/Open-Delta Three-Phase Transformer a) Calculate the total secondary load current phasors I,, I,, and I. b) Caleulate the primary load current phasor I, . c) Calculate the power factor for the x2-X3 portion of transformer T1.

2. Utilities may use the Open-Wye/Open-Delta connection for three-phase transformers when maintenance is needed. The transformer in Figure P4 is serving both single-phase and three-phase loads. ABC N 12.47kV 120/240V a bc n IA T1 Ia H1 x3 x2 In H2 x1 IN Ib H2 x3 IB Ic H1 х1 Г2 9KVA single-phase PF=1.0 80KVA three-phase PF=0.91 (lag) Figure P4 Open-Wye/Open-Delta Three-Phase Transformer a) Calculate the total secondary load current phasors I,, I,, and I. b) Caleulate the primary load current phasor I, . c) Calculate the power factor for the x2-X3 portion of transformer T1.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Explain step by step please a b and c

2. Utilities may use the Open-Wye/Open-Delta connection for three-phase transformers when maintenance is needed. The transformer in Figure P4 is serving both single-phase and three-phase loads. ABC N 12.47kV 120/240V a b c n Hi IA T1 Ia H1 x3 x2 In H2 х1 IN Ib H2 x3 IB Ic 9KVA H1 х1 T2 single-phase PF=1.0 80KVA three-phase PF=0.91 (lag) Figure P4 Open-Wye/Open-Delta Three-Phase Transformer a) Calculate the total secondary load current phasors I, I, and I̟. b) Calculate the primary load current phasor I . c) Calculate the power factor for the x2-x3 portion of transformer T1.
Transcribed Image Text:2. Utilities may use the Open-Wye/Open-Delta connection for three-phase transformers when maintenance is needed. The transformer in Figure P4 is serving both single-phase and three-phase loads. ABC N 12.47kV 120/240V a b c n Hi IA T1 Ia H1 x3 x2 In H2 х1 IN Ib H2 x3 IB Ic 9KVA H1 х1 T2 single-phase PF=1.0 80KVA three-phase PF=0.91 (lag) Figure P4 Open-Wye/Open-Delta Three-Phase Transformer a) Calculate the total secondary load current phasors I, I, and I̟. b) Calculate the primary load current phasor I . c) Calculate the power factor for the x2-x3 portion of transformer T1.
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