Solution Found!
The diagram shown in P 12.7-7 has two threephase loads that form part of a manufacturing
Chapter 12, Problem P12.7-7(choose chapter or problem)
The diagram shown in P 12.7-7 has two three phase loads that form part of a manufacturing plant. They are connected in parallel and require 4.16 kV rms. Load 1 is 1.5 MVA, 0.75 lag \(p f \Delta\) connected. Load 2 is 2 MW, 0.8 lagging
pf, Y connected. The feeder from the power utility’s substation transformer has an impedance of 0:4 + j0:8 \(\Omega\)/phase. Determine the following:
(a) The required magnitude of the line voltage at the supply.
(b) The real power drawn from the supply.
c) The percentage of the real power drawn from the supply that is consumed by the loads.
Questions & Answers
QUESTION:
The diagram shown in P 12.7-7 has two three phase loads that form part of a manufacturing plant. They are connected in parallel and require 4.16 kV rms. Load 1 is 1.5 MVA, 0.75 lag \(p f \Delta\) connected. Load 2 is 2 MW, 0.8 lagging
pf, Y connected. The feeder from the power utility’s substation transformer has an impedance of 0:4 + j0:8 \(\Omega\)/phase. Determine the following:
(a) The required magnitude of the line voltage at the supply.
(b) The real power drawn from the supply.
c) The percentage of the real power drawn from the supply that is consumed by the loads.
ANSWER:Step 1 of 7
(a)
The apparent power of the Y connected load,