Answer / apu chatterjee

60hz transformers cannot be operated at 50hz service due to higher loss and resultant heat rise.

Answer / mahesh kumar yadav

according to the the formula n=120f/p, we can only obtain
the frequency of 60 hz,if the number of pole is 2.5 so usa
is able to developed 2.5 pole machine but india cannot.SO
don't think why power generation in india is at 50 hz while
in america its 60 hz.THINK THIS THAT WHO TO MAKE 2.5 POLE
MACHINE?

Answer / ankit kaushal

i think
it is just
the standardization of country.

Answer / parminder

i m not agree with MULLU. coz if this the only reason then
the distribution cost will increase due to bigger conductor
size & insulation

Answer / deepak kumar

For the same supply ,IN US FREQUENCY IS 60 HZ,DUE TO THAT
all the EQUIPMENTs ARE RUNNING WITH (60-50)/50*100 i.e 20%
higher SPEED as compared to INDIA.now if N would be higher
(w=2pief),generated emf wld be more;

i.e for the same supply ,but for different frequency ;the
generated e.m.f wld be more.

Answer / akhil

If frequency is high then losses are more
as we know that hysterysis loss
ph=k*B^1.6*f and eddy current loss
pe=k*B^2*f^2
so
the transformers produced in India can be used there too
but transformers designd there cannot be used here

Answer / dheeraj

i think there is no technical reason behind the generation
of power at 50Hz in India and 60Hz in America. It is just
the standardization of country. America firstly designad
their equipments at 60Hz and after that India and other
countries designad their equipments at 50Hz.

Answer / raaju

Though it may be 60 or 50hzs, it never matter>>>>>enjoy the
power u get.........

Answer / tripple x

MR "Thuranga". SAALE JIS DESH MAIN REHTA HAI USE BACKWARD
BOLTA HAI,, SAALE BACKWARD TUM LOGO HO, JINHE KUCH V PETA
NAHI HAI, CHUTIYA SAALE.............

Answer / vishvesh

well, for the safety reason of the consumer in the US, they
decided to kept voltage level at 110V a.c. at the consumer
end. but to avoid distribution loss and over heating of the
conductors they kept frequency of AC supply at 60 Hz. to
reduce that losses.

I have an existing old MCCB. ABB Model SACE, the rating are: Ue = 660 volts, Iu =1250 Amps, 3 poles, Ith (max) =800 amps at 45 deg C. I need a circuit breaker for my 3 phase motors, 380 volts 60 hz. the supplier required the minimum ampacity of the breaker to be 911 amps. can i use this breaker with rating of Iu =1250 amps but Ith = 800amps maximum?

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