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// Example 3.7
// Computation of (a) Bank ratio (b) Transformer ratio (c) Rated line and phase
// currents for the high side (d) Rated line and phase currents for the low side
// Page No. 113
clc;
clear;
close;
// Given data
VLINEHS=4160; // Number of turns in the high side
VLINELS=240; // Number of turns in the low side
VHS=2400; // Voltage at the high side
S=4800; // Supply voltage
Vline=150000; // Transformer rating
// (a) Bank ratio
bankratio=VLINEHS/VLINELS;
// (b) Transformer ratio
Vphasep= VLINEHS/ sqrt(3); // For wye primary
Vphases=VLINELS // For secondary
TR=Vphasep/Vphases; // Transformer ratio
//(c) Rated line and phase currents for the high side
Ilinew=Vline/(sqrt(3)*VLINEHS);
Iphasew=Ilinew;
// (d) Rated line and phase currents for the low side
Ilined=Vline/(sqrt(3)*VLINELS);
Iphased=Ilined/sqrt(3);
// Display result on command window
printf("\n Bank ratio = %0.1f ",bankratio);
printf("\n Transformer ratio = %0.1f ",TR);
printf("\n Rated line current for the high side = %0.1f A ",Ilinew);
printf("\n Rated phase current for the high side = %0.1f A ",Iphasew);
printf("\n Rated line current for the low side = %0.1f A ",Ilined);
printf("\n Rated phase current for the low side = %0.1f A ",Iphased);
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