Q1. A 3-Ø line has an impedance of (2 +j3) ohm per phase, this line feeds 2- balanced 3-Ø loads which are connected in parallel. The 1“ load is Y-connected and it has impedance of (20 + j30) per phase, and the other is delta-connected with an impedance of (50-j40) ohm per phase. The line is energized at the sending end from a 60-Hz, 3-0, balanced voltage source of 120V3 V (rms, LL). Find: (a) The current, real power, and reactive power delivered by the sending-end source. (b) The Vu, at the load. (c) The current per phase in each load. (d) The total 3-phase real and reactive powers absorbed by each load and by the line.

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Q1. A 3-Ø line has an impedance of (2+j3) ohm per phase, this line feeds 2- balanced 3-Ø loads which
are connected in parallel. The 1* load is Y-connected and it has impedance of (20 + j30) per phase, and
the other is delta-connected with an impedance of (50-j40) ohm per phase. The line is energized at the
sending end from a 60-Hz, 3-0, balanced voltage source of 120V3 V (rms, LL). Find:
(a) The current, real power, and reactive power delivered by the sending-end source.
(b) The VLL at the load.
(c) The current per phase in each load.
(d) The total 3-phase real and reactive powers absorbed by each load and by the line.
Transcribed Image Text:Q1. A 3-Ø line has an impedance of (2+j3) ohm per phase, this line feeds 2- balanced 3-Ø loads which are connected in parallel. The 1* load is Y-connected and it has impedance of (20 + j30) per phase, and the other is delta-connected with an impedance of (50-j40) ohm per phase. The line is energized at the sending end from a 60-Hz, 3-0, balanced voltage source of 120V3 V (rms, LL). Find: (a) The current, real power, and reactive power delivered by the sending-end source. (b) The VLL at the load. (c) The current per phase in each load. (d) The total 3-phase real and reactive powers absorbed by each load and by the line.
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