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Associate

Join Date: Mar 2014
Location: Mumbai, India
Posts: 25

# Optimum Supply Frequency

03/07/2017 4:46 AM

1. Why AC Waveforms (V & I) have frequency of 50 Hz in some countries and 60 Hz in some countries? What are advantages and disadvantages of 50Hz over 60Hz? And if lower frequency has more advantages, then why not 25Hz or if vice-versa, then why not 100Hz? How optimum point of frequency is decided? Thanks in Advance

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Guru

Join Date: Apr 2010
Posts: 5817
#1

### Re: Optimum Supply Frequency

03/07/2017 10:07 AM

The biggest player sets the standard and everybody else falls in. In the early days, there were multiple frequencies used. This is a good explanation:

http://electrical-science.blogspot.com/2009/12/history-of-power-frequency.html

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Join Date: Jan 2007
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#2

### Re: Optimum Supply Frequency

03/07/2017 11:38 AM

Aaaah, um, there is an article in Wikipedia on this topic...

Plus, this is a duplicate thread. There has been discussion in these columns before.

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Join Date: Sep 2006
Location: California, USA, where the Godless live next door to God.
Posts: 4411
#3

### Re: Optimum Supply Frequency

03/07/2017 8:00 PM

Many, many, MANY times before....

It always boils down to this: the difference is just because people are different. Between 50 or 60Hz, no advantages of one over the other without some countervailing disadvantage. As to higher frequencies, harder to make and more losses over long distances. Lower frequencies resulted in lighting flicker. 50 or 60 Hz was the compromise but done at opposite sides of the Atlantic in a time without instantaneous mass communications.

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