i am a student. i have a question about three phase power. question: a three phase delta connected motor draws a line current of 18A∠-85 degree from the 400v supply. 1) how much power does the load dissipate? my anwer is: P=√3 VIcosφ=√3*400*18*cos85=1087w 2) calculate the motor output when connected in star? my anwer is: first calculated impedence in three winding IN delta connection: Ip=18/√3= 10.4∠-55A (line current lag phase current 30 degree in delta) Z=400/(10.4∠-55)=38.46∠-55 ohm IN star connection: I=V/Z=230/38.46∠-55 =6∠-55 P=√3 VIcosφ=√3 *400*6*cos55 = 2384w problem is power in delta shoud be 3 time more in star . my anwer is wrong. but i donot known where is wrong?