Answer / abdul wajid

The standard earthing for 440V system is less than 1 ohm ,
for 33000/440V the standard earth resistance is 5 ohm

Answer / saic~ehvvibes

Earthing resistance standard values:

Without Grid (Individual Earth Pit) = Less than 01Ohm
With Grid = less than 05Ohms

Stator of three phase induction motor creates Rotating Magnetic field.But why not Transformer?

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I have 4 busbar of 1000 ampere. we use 4 busbar to make 4000 ampere in one phase.my problem is that when we applied 60% load on that then busbar produced high noise.what is the reason of that and how can i minimize that noise.

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