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.
