Friday, August 10, 2012

Why electricity in India is in the multiples of 11 like 11kv, 22kv, 33kv ?



 Transformer Induced voltage equation contains 4.44 factor.
               
                       E=4.44*f*T*phi

E -Induced emf per phase
T -number of turns
f -frequency
phi -maximum flux per pole


From the equation we see that E is proportional to 4.4 and it is in turn multiple of 11.So always transmission voltage is multiple of 11.

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