Answer / ramdoss

In the british period itsely we are using 50 hz , so now
days all the manufacturing company designed his products in
50 Hz . Thi sis also indian standard rules

Answer / gourav

The answer to this is more of non technical. As per British
standards (right from the 19th century) 50 Hz was set as
base frequency for our grid. Now all the equipments are
designed on this basis.

Answer / arul

I will explain with one example:-

if one textile company is there, some motor using for dress
making purpose. if frequency is fixed (50 hz) in this
condition we get normal dress (threads are correctly
matching). if variable frequency is there in this
condition, motor speed will change, we see in order
matching of thread in this dress.

so we use fixed frequency.

Answer / koti

It should be above sensing capacity of our eye (>22). But factor of safety made to 44 and rounded to 50.

Answer / premkumar

We know that syn speed=120f/p
The turbines are designed such that they will give max efficiency at 3000rpm. for good performence a generator should have 2field poles. hence giving f=50hz

Answer / dileep

freauency will help to design the electrical appliances like mot ors
,genafators etc & performance is also depends upon the frequ.if we
change the frequency speed,flickering of light also changes
2).in the genaration view if frequency knows then we know dat how
much amount of steam we should give to turbine.

Why we use Fuse in transformer in secondary side.Why we dont use fuse in primary side?

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Stator of 3-phase IM has 3 slots per pole per phase. If supply frequency is 50 Hz, calculate the speed of rotating stator flux A 1000 rpm B 500 rpm C 1500 rpm D 1440 rpm

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