Figure C-5: The Purpose Of High Voltage Transmission - Advantech ADAM-5000/TCP Series Manual

1-4 Wire impedance

Figure C-5: The purpose of high voltage transmission

• What's the purpose of high voltage transmission?
We have all seen high voltage transmission towers. The power plant
raises the voltage while generating the power, then a local power station
steps down the voltagC. What is the purpose of high voltage transmis-
sion wires ? According to the energy formula, P = V * I, the current is
reduced when the voltage is raised. As you know, each cable has imped-
ance because of the metal it is made of. Referring to Ohm's Law, (V = I *
R) this decreased current means lower power losses in the wirC. So, high
voltage lines are for reducing the cost of moving electrical power from
one place to another.
Grounding Reference
ADAM-5000/TCP User's
Manual
Appendix C
C-7