Transmission Lines

1.

TRANSMISSION
LINES

2.

Definition
Transmission Lines it’s a set of conductors used to
transmit and distribute electrical energy.

3.

History
The first high-voltage
power lines appeared at
the turn of the XX century
and their supports were
made of wood. The first
transmission took place in
Russia in 1891 and
assumed
the
transportation
of
electricity with a voltage
of 30 kV over a distance
of 178 kilometers. The
experiment
was
successfully set up by the

4.

Types of
transmission lines
There are overhead and cable
power lines.

5.

Overhead power line
An overhead power
line is a structure used in
electric
power
transmission
and
distibution
to
transmit electrical energy
across large distances. It
consists of one or more
uninsulated
electrical
cables
suspended
by towers or poles.

6.

Classification of overhead
transmission lines
By operating voltage:
Low voltage
Medium voltage
High voltage
Extra high voltage
Ultra high voltage
By length of the line:
Lines shorter than 50 km are generally referred to
as short transmission lines.
Lines between 50 km and 150 km are generally referred
to as medium transmission lines.
Lines longer than 150 km are
considered long transmission lines.

7.

Cable power lines
A cable power line is a
power transmission line
made by one or more
cables laid directly into
the
ground,
cable
channels, pipes, on
cable structures.

8.

Classification of cable
power lines
According to the conditions of transit:
underground
by structures
underwater.
By type of insulation:
Liquid
Solid
paper-oil

9.

Thanks for your
attention