I think this guy is right about this book.Apart from wrong answers there is an example on page 74 which in my opinion is calculated wrong. To find the line current in a star connection it is the same as finding the phase current (Il= Ip) therefore if impedance of each coil plus resistance is = 41.34 so to find the phase current we just divide the phase voltage with the impedance 230.49v divided with 41.34 = 5.575 Amps not 6.65Amps . He did it this way 400V divided by 41.34 * 1.732* 0.84 = 6.65. please can someone confirm if um right or wrong 10x.

 

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We prefer that you do not hijack threads, but always start your own. The thread you posted in was this one - http://forum.allaboutcircuits.com/showthread.php?t=40044