Answer Posted / gnanprasad.korrapati
When the German company AEG built the first European generating facility, its engineers decided to fix the frequency at 50 Hz, because the number 60 didn’t fit the metric standard unit sequence (1,2,5). At that time, AEG had a virtual monopoly and their standard spread to the rest of the continent. In Britain, differing frequencies proliferated, and only after World War II the 50-cycle standard was established. A big mistake, however.
Not only is 50 Hz 20% less effective in generation, it is 10-15% less efficient in transmission, it requires up to 30% larger windings and magnetic core materials in transformer construction. Electric motors are much less efficient at the lower frequency, and must also be made more robust to handle the electrical losses and the extra heat generated.
Today, only a handful of countries (Peru, Ecuador, Guyana, the Philippines and South Korea) follow Tesla’s advice and use the 60 Hz frequency together with a voltage of 220-240 V.
Originally Europe was 110 V too, just like Japan and the US today. It has been deemed necessary to increase voltage to get more power with less losses and voltage drop from the same copper wire diameter. At the time the US also wanted to change but because of the cost involved to replace all electric appliances, they decided not to. At the time (50s-60s) the average US household already had a fridge, a washing-machine, etc., but not in Europe.
The end result is that now, the US seems not to have evolved from the 50s and 60s, and still copes with problems as light bulbs that burn out rather quickly when they are close to the transformer (too high a voltage), or just the other way round: not enough voltage at the end of the line (105 to 127 volt spread !)
Is This Answer Correct ? | 6 Yes | 2 No |
Post New Answer View All Answers
54 Comments Alok and Bhanu play the following min-max game. Given the expression N = 38 + X*(Y – Z) where X, Y and Z are variables representing single digits (0 to 9), Alok would like to maximize N while Bhanu would like to minimize it. Towards this end, Alok chooses a single digit number and Bhanu substitutes this for a variable of her choice (X, Y or Z). Alok then chooses the next value and Bhanu, the variable to substitute the value. Finally Alok proposes the value for the remaining variable. Assuming both play to their optimal strategies, the value of N at the end of the game would be?
What is the difference between grid and off- grid system??
what is rocking arrangement in arc heating
Why AC & DC capacitor are use in UPS ??????????????????
The Q-facr o of a coil given as wL/R. what will be shape of Q versus frequency graph.
Why does the speed regulating system adopting I controller have no steady-state error? In this single closed-loop speed regulating system, when the input of the I controller Un=0, what is the output voltage of the regulator? What factors do the output voltage depend on?
how define the torque in ac drive. from electrical side in the drive friquency ,voltage and current three factor is there.
. How to calculate the Short Circuit Impedance in Transformer? How to calculate the Short Circuit Impedance in Transformer?
how to Select Lighting arrester? What r the parameters to be considered for the selection of Lighting arrester ?
acb(AIR CIRCUIT BREAKER)NOT CHARGING AUTO
How cable from Kit-Kat to main switch, from starter to motor are designed?
1.What will be stored in online ups EPROM IC?
in india per day how much power is generated including all power station
If a air condition consume 2.50 to 3.00 amp then how much it will consume in watts if it is running 10 hours out of 24 hours????
what is submersible pump?what is different between motor and sub motor?