Answer to Question #167891 in Electrical Engineering for jim

Question

A 7.5 HP 230 volt three phase motor takes a line current of 18.4 A when operating at

rated output at an efficiency of 88%. Calculate the indications on wattmeters when

these are inserted to measure power (a) by two wattmeter method, (b) by the artificial

neutral method and (c) by the T method.

Answer 1

the indications on wattmeters = 18.35W