Question { Engineers India Limited, 16360 }

how the 12 pulse rectifier is made?

Answer

12 pulse rectifier can be formed by using two six pulse converters (i.e 3-phase converters )connecting in series

Question { Bhel, 11744 }

what use can we make of 3rd harmonic component

Answer

generally harmonics means ,the unwanted response at the output
....coming to electrically ,the 3rd harmonic components are
eliminated by connecting the alternator 3-phase windings are
in delta or star...but the star connection most preferable
compare delta ,because of the 3rd harmonics components
produces circulating currents,. it results to increase the cu
losses and heat due to that efficiency decreases .so star
connections most preferable