Answer / binay agrawal

if we give approx 1500rpm to stator, only that case good
induction is covered, & the winding is of genetrally 4 pole.
so according to N=120f/P,
Frequency should be around 50-60HZ.

Answer / atul

it is the just standard which is adopted globally (60hz china, 50hz rest of the world). Design of equipment adopting common standard is easy. the design of equipments based on different freqencies would have been different which is quit difficult.

I have a small system with two motors that are running on 380 vac, 60 hz. These motors are expensive and I usally get them from Brazil. I am adding another motor to the system, but I want to purchase a 480 vac, 60 hz motor to use. It will be on a VFD that is rated fro 380 thru 480. Is this posible and will I have to use a larger motor and derate it?

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Dear sir, I have completed DECE in the year 1995. I have work experience in HT and LT LINE more than five years. Now i am doing BE in EEE from rajasthan university. After completion of BE,can i apply "C" Licence sir? Please reply.

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hi i wonder will the speed of a 50hz AC motor reduce if i supply it with 25hz?

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sir pls tell me . our ct specifications are 120/5 ,2 core , 0.2 and 5p10 class , 30va and 30va buden. insted of 30 va i want use 15 va. can i use?

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