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+// Example 5.19
+// Computation of (a) Locked rotor current per phase and minimum locked rotor 
+// torque when starting (b) Locked rotor current per phase when motor is delta 
+// connected (c) Code letter 
+// Page No.233
+
+clc;
+clear all;
+close;
+
+// Given data
+V=460;                 // Rated Voltage
+Z=0.547;               // Locked rotor impedance
+n=1750;                // Speed of machine
+hp=60;                 // Horsepower rating of device
+f=60;                  // Frequency of motor 
+
+
+// (a) Locked rotor current per phase and minimum locked rotor torque 
+Vphase=V/sqrt(3);        // Voltage/phase
+Ilr1=Vphase/Z;            // Locked rotor current/phase
+Trated=hp*5252/(n);      // Rated torque
+Tlr=1.4*Trated;          // Locked rotor torque
+T2=Tlr*(Vphase/V)^2;
+
+// (b) Locked rotor current per phase when motor is delta connected 
+Ilr=V/Z;                 // Locked rotor current/phase
+Il=Ilr*sqrt(3);          // Line current
+
+// (c) Code letter
+Slr=sqrt(3)*V*Il/1000;   // Code letter at rated voltage
+kVA=Slr/f;
+
+// Display result on command window
+
+printf("\n Locked rotor current per phase = %0.1f A",Ilr1);
+printf("\n Minimum locked rotor torque = %0.0f lb-ft",T2);
+printf("\n Locked rotor current per phase when motor is delta connected = %0.0f A ",Il);
+printf("\n Code letter = %0.1f",kVA);
+
+