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Transmission lines carry electric energy from one point
to another in an electric power system. They can carry
alternating current or direct current or a system can be
a combination of both. Also, electric current can be
carried by either overhead or underground lines. The
main characteristics that distinguish transmission lines
from distribution lines are that they are operated at
relatively high voltages, they transmit large quantities
of power and they transmit the power over large
distances.
Because of the high maintenance needs these towers have
always a "user-friendly" acces route. Some transmission
line towers have ladders running inside their iron
sheleton. Others have spikes running along one of the
corners. |
