3.71 In the circuit shown in Figure P3.71, V_(S) models the voltage produced by the generator in a power plant, and R_(S) models the losses in the generator, distribution wire, and transformers. Resistances R_(1),R_(2), and R_(3) model the various loads connected by a customer. How much does the voltage across the total load change when the customer closes switch S_(3) and connects the third load R_(3) in parallel with the other two loads?
V_(S)=450V,R_(S)=19mOmega
R_(1)=R_(2)=1.3Omega ,R_(3)=500mOmega
Figure P3.71
3.71In the circuit shown in Figure P3.71,V models the voltage produced by the generator in a power plant, and Rs models the losses in the generator, distribution wireand transformers.Resistances R.R,and R model the various loads connected by a customer. How much does the voltage across the total load change when the customer closes switch S and connects the third load R in parallel with the other two loads? Vs=450V Rs=19m R=R=1.3
Rs WW
Power system
Figure P3.71