CrazyEngineers Archive
Old, but evergreen and popular discussions on CrazyEngineers, presented to you in read-only mode.
@Dheeraj Upadhyay • 01 Sep, 2012
Why we are using power supplies of 230 v and 50HZ standard. Whats the problem in having power supplies at some other frequency say ,70 ,90HZ....Why 50 Hz is fixed... Is there any effect if we use a power supply of different frequency..?????
@Kaustubh Katdare • 01 Sep, 2012 The real reason is because Indians, instead of developing their own standards, blatantly copy-pasted the British standards.

Technical 'explanations' may follow.
@[Prototype] • 01 Sep, 2012 • 1 like 50/60 HZ is an optimum frequency which keeps the transmission losses to tolerable limits. The higher will be the frequency, the more will be the losses.
@Abhishek Rawal • 02 Sep, 2012 • 1 like It is an optimum frequency like Prototype said, you cannot use >60Hz.
And 50Hz is not fixed, it's not universal frequency.
United states & many Europe countries uses 60Hz frequency which is close optimum frequency to 50Hz.
However, it has been noticed that lower frequencies causes the size, weight & hence the cost to increase. Also, more flickers are noticed in lesser frequencies than higher frequencies. Hence 60Hz is preferred over 50Hz in most developed countries.
Both frequencies have drawbacks & Pros.
Some countries switched to 50Hz just to fit the metric system.

PS: countries with 60Hz frequency dont use 220V/240V Power supply, infact 110V-120V supply is used.
@naveee • 02 Sep, 2012
The_Big_K
The real reason is because Indians, instead of developing their own standards, blatantly copy-pasted the British standards.

Technical 'explanations' may follow.
we indians use 240 volt for 50 hz...... if we use..60 hz we hav to apply 120 volt ....but the minmum voltage is 240 volt for many elctrical appliances so we use 50 hz......
@Naman Agarwal • 02 Sep, 2012 • 2 likes
Dheeraj Upadhyay
Why we are using power supplies of 230 v and 50HZ standard. Whats the problem in having power supplies at some other frequency say ,70 ,90HZ....Why 50 Hz is fixed... Is there any effect if we use a power supply of different frequency..?????
actually we cant use frequency below 50Hz. have u ever heard about lamp flickering??..listen..lower the frequency...means high time period to complete a cycle....means half time is required for half cycle...ih half cycle voltage reaches its peak one time and also get down to zero one time. if this time is more then u can see that the bulb is glowing and off by your eyes...if this time is less then u cant see this flickering by your eyes...that why frequency of 50Hz is adopted...50 Hz means 20ms to complete a full cycle...means 10ms for half cycle..ie., in 10ms bulb glows once and off once..so u cant see this flickering...so lower frequency is too unreliable...
and in India +-5% of given frequency varies...
@Naman Agarwal • 09 Sep, 2013 higher the frequency , higher will be the transmission line reactance, ans you know that maximum power transfer capability is inversly prportional to the line reactance. therefore due to high reactance , power transfer capability will reduce That's why higher frequencies are also not advised or adopted.
@Ahsanul haque • 16 Sep, 2013 50Hz and 60Hz applicable but 90Hz lol. 60Hz used in USA transmission lines.
@pushpa shanvitha • 22 Nov, 2017 Why india having 50hz frequency less than America
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