The equation of the sag is

S = W_{C} L^{2} / 8T

Where

S = Sag

W_{C} = Weight of conductor per meter

L = Length of conductor

T = Tension on conductor

**Weight of conductor **

- As the weight of conductor increases, the sag also increases.
- The ice formation on the conductor also increases the sag on the transmission line.

S α ( W_{C} )

**Span ( length of conductor )**

- The sag is directly proportional to square of length of conductor.
- If the length of conductor double, the sag increases four times.

S α ( L^{2} )

**Tension**

- The sag and tension are inversely proportional.
- As the tension on the conductor increases, the sag decreases.
- The tension on the conductor increases by wind pressure, ice loading and natural disasters.

S α ( 1 / T )

**Temperature **

- As the temperature increases, the length of conductor expand and vice versa therefore the sag increases as the temperature increases.

**You may also like :**

Minimum clearance between transmission line towers
when crossing each other

Minimum clearance between transmission line conductor
and ground

What do you mean by low voltage, medium voltage and
high voltage?

Features of all Aluminium conductors

## No comments:

## Post a Comment