Answer / pratap kumar

In India the electrical system is come later as compared with U.S. USA is choose 60hz frequency for 110-120v. The losses are increased in any machine by increase the frequency. but the voltage is low as compared with India. then the voltage loss occur in machine is low when compared to India.but the frequency losses are more . My conclusion is in India the machines are supported to 240v,50hz for cover the losses and in U.S is 120v,60hz respectively.
advantages for USA supply
1: it is safe from shock hazards because the voltage is low
2: suppose the supply is grounded less power is loss as compare with India
the above two points are disadvantages for India
suppose we use 60hz with 240v it is very dangerous and it cause more losses in machine.

Answer / vivek singh

for the frequency less than 50 hz electrical lamps will
appear to dark and glow .human eye cannot see the
fluctuation for frequency more than 50 hz, but if frequency
is increased more losses will increase and the voltage
applied can be reduced.In India 50 hz is used too prevent
losses but it is more danderous for human life.In USA 60 hz
is used because they can bear losses but not the loss in
human life.

Answer / meenakshi

i think dis is not an adv or disadv bz as Indian appliances are manufactured for 50 hz we use dat but US appliances are made for 60 hz it is not at all economical for us to change now to 60 hz and more over our gen is less compared to US

Answer / afzal ansari

its true that the power stations include a fixed speed of
rotor(3000 rpm) and fixed no. of poles as producing 50 hz
supply but i think it is fixed due to the conventional
electrical equipments which were using the same supply and
now a days equip.are designed on the basis of that...

Answer / chadak singh rathode

Transmission losses would be high if we use 60hz and it is of high cost when compared. A motor that is designed to run on 60 Hz and is plugged into a 50 Hz system will turn 17% slower, the internal current will go up 17%, the amount of power (watts) will go down 17%, and the mechanical cooling will be 17% less. The end result will be that the motor will be using a higher current then what the motor was designed for, and this in turn will burn up the insulation of the electrical wiring which can result in burnout which could cause a fire because of the excessive heat. The reason that 120v service was chosen, was economic. Originally electricity was delivered to homes, and most businesses, for a single purpose and that was lighting. Can openers, TVs, washers, dryers, electrical factory machinery, etc. came later. At the time the most cost effective form of light bulb was a carbon filament bulb that operated best (optimally) at 100v to 110v. This, adjusted for transmission voltage drop, set most supply lines at 120v.

Answer / vijay

THAT IS THE INDIAN STANDARD ADOPTED , IF WE ALTER THAT THE
ALL MACHINES STANDARD IS TO BE CHANGE.

Answer / don

in britain they used 50 hz supply so they installed plants
in india on their own standard,but americans followed to use
60 hz.there is no practical difference between these two
rated frequencies.

Answer / mullu

m nt satisfied with the answers pls give some right answers..

Answer / harish repalle

its an hypothetical question ...........

Answer / sharat das, mahindra ltd.

The frequency is 60hz and 110v supply. but in india
is about 240v,50hz supply. for a particular load say 100kw
the current will be 0.416A. but in 60Hz the same load will
consume about 0.9A. here the thing is the heat produced in
the cable bcoz of the flow of current will be large in 60Hz
compare to India. since a cold country they can use
this level but not by India. And also specified for Country By WEAC Roles.

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