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why only 11kv level is used for transmission purpose? why
not 230v?
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Answer Posted / thowsif_emerson
One of the key concerns in the transmission of electricity
is the power loss in transmission lines, dissipated as heat
due to the resistance of the conductors.
High-voltage transmission lines are used to transmit
electric power over long distances. Normally, high voltage
(HV) transmission power lines are made of high voltage
(between 11 and 765 kilovolts) conducting lines of copper
and/or aluminum.
Assume the power to be transmitted is P, and the resistance
of the transmission line is r.
If the power is transmitted with voltage V, then the
current flow through the transmission line is I=P/V.
The power loss Ploss=I2*r=(P/V)2*r
Since P and r are fixed conditions, less power will be lost
if high voltages V are used.
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