Most efficient way to transmit 1 KVA

1000 volt and 1 Amp equal 1000W 1 volt and 1000 Amp equal 1000W 500 volt and 2 Amp equal 1000W 5 volt and 200 Amp equal 1000W

The question becomes: which is the most efficient way to send power (voltage and current) down a wire?

Power lines have losses when heat is generated in them by electric current moving through the wires. There is a loss of power down the length of the wire.

 

Example 1

	Double the voltage
	halves the current
	The power loss decreases by `2^2=4`

Or another way of saying this

	Increase the voltage by a factor of  `2`
	decreases the current by a factor of  `2`
	The power loss decreases by `2^2=4`

 

Example 2

 

	Increase the voltage by a factor of  `100`
	decreases the current by a factor of  `100`
	The power loss decreases by `100^2=10,000`

 

So there are massive advantages for sending high voltage over long distances in a wire.

HIGH VOLTAGE = LOWER ENERGY LOSSES

Which equals thinner cables needed.

 

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