Why 50hz and 60hz frequencies are used by the world, why they are not taking 5

Why 50hz and 60hz frequencies are used by the world, why
they are not taking 55hz?

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Why 50hz and 60hz frequencies are used by the world, why they are not taking 55hz?..

Answer / saa

RPM of Prime mover is related with Electrical frequency.

Some countries use 50 HZ with 1500 Rpm for 4 pole
Some countries use 60 Hz with 1800 Rpm for 4 pole

for 55 Hz 4 pole RPM of Prime mover will be 1650

Some countries use 50 HZ with 1000 Rpm for 6 pole
Some countries use 60 Hz with 1200 Rpm for 6 pole

for 55 Hz 6 pole RPM of Prime mover will be 1100

Itz just matter of Choice.

Is This Answer Correct ?

22 Yes

2 No

Why 50hz and 60hz frequencies are used by the world, why they are not taking 55hz?..

Answer / s.ojha

The speed of conected in line will vary that will result
all system will need modifying mechnically and electrically.
There is no posibility to change all and everywhere.

Is This Answer Correct ?

7 Yes

9 No

Why 50hz and 60hz frequencies are used by the world, why they are not taking 55hz?..

Answer / syed

55 is not an standard frequency,

Is This Answer Correct ?

5 Yes

17 No

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