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?

Question Posted / guest

3 Answers
8682 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

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

Post New Answer

More Electrical Engineering Interview Questions

For refrigerators the motor current is raised beyond its rating on both conditions when the voltage of the system is more(say 270v) than the rated voltage(220v) as well as when the voltage of system is less(say 160v) than normal voltageof 220v, why explain?

0 Answers Electrical Tech, UPSE,

Vibromotor 252MV 1/4HP2P..what is mean by 252MV?

0 Answers

i want to know d working mechanism of tafe tractors next i like to know d engine type of apache bighs can anyone help me

0 Answers

when running 2 nos 450kva dg sets in parallel operation ,in one Dg set power factor and Kvar going to lagging and ampere suddenly going high,please give me suggestion to correct the same.

2 Answers

What is the usega of brking resistor? and how it will useful to Drive...?

3 Answers

suri transmission

0 Answers Bhel,

why two contacts(in series) are using in closing circuit

3 Answers

If an electrical component has a positive temperature coefficient, how come such components have high power losses due to heat if current decreases when resistance increases? assuming power given by I^2*R whereby the Resistance is infinite.

0 Answers

How to select Main CB Rating for 220 KW Load?

3 Answers Voltech,

What is a difference between indoor transformer and outdoor transformer of same rating

0 Answers Suzlon,

what is the diff between mcb and vcb

3 Answers

can we start slipring motor on star delta like we start induction motor ? if yes where will we connect ?

0 Answers NovaTech,

For more Electrical Engineering Interview Questions Click Here