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Answer Posted / rajesh
In answer #2, Bhuwnesh Namdev has just copied from
wikipedia. While copying, has not even removed the refrence
nos. [1], [2],[3] etc. which appears along with the
explanations in wikipedia. What is appearing here is the
answer to the question "what is ferranti effect?". But here
the question is not that. The question is why Ferranti
effect does not occur at full load.
At light load, the line current is predominantly capacitive
in nature, hence it leads the voltage by almost 90 degrees,
so the voltage drop in the line impedance (which is
predominantly inductive) leads the source voltage by almost
180 degrees. So there is a voltage rise when you move
towards the receiving end. This is the Ferranti effect.
However, at full load, the current is predominantly
inductive(the power factor of the load in an Industry may
be taken as 0.8 lagging as a typical value). Therefor the
voltage drop in the line impedance (which is inductive) is
almost in phase with the source voltage.Hence the receiving
end voltage is less than the sending end voltage.
| Is This Answer Correct ? | 45 Yes | 1 No |
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