Answer Posted / ram lal

power factor is not mention so how can calculate ...........

please send the IS strandard for electrical to sakthi_murugan86@yahoo.co.in

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which motor have relatively high power factor and what is reason for have high pf? 1.capacitor run motor 2.shaded pole motor 3.capacitor start motor 4.split phase motor

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Hi Suppose we have a wye/wye transformer which is grounded at both sides,in this situation, do we have ay ground transformer? in other words, ground transformer can do any thing more (while we have nuetral wire in both sides)? As the last question, what about 3rd harmonic? we have two choices: first using wye/delta transformer + ground transformer and second using wye/wye earthed connection.in the former choice, we dont have 3rd harmoonic at the secondary side but what about Yn/yn conection? do we suffer from 3rd harmonic in the Yn/yn connection?

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