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+// Ex 68 Page 408
+
+clc;clear;close;
+// Given
+VRY=200*expm(%i*0);//V
+VYB=200*expm(%i*-120*%pi/180);//V
+VBR=200*expm(%i*120*%pi/180);//V
+
+
+ZA=10*expm(%i*60*%pi/180);//ohm
+ZB=10*expm(%i*0*%pi/180);//ohm
+ZC=10*expm(%i*60*%pi/180);//ohm
+
+//Phase current
+IRY=VRY/ZA;//A
+IYB=VYB/ZB;//A
+IBR=VBR/ZC;//A
+
+IR=IRY-IBR;//A
+PVA=conj(VRY)*IR;//W
+printf("Wattmeter W1 reading=%.f W",real(PVA))
+IB=IBR-IYB;//A
+PVB=conj(-VYB)*IB;//W
+printf("\n Wattmeter W2 reading=%.f W or %.f kW",real(PVB),real(PVB)/1000)