User manual

Grounding Reference
1-4 Wire impedance
Appendix C
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.
ADAM-5000/TCP User’s
Manual
C-7