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Peak of Transmission Tower: Conductor

The document describes the main components of a transmission tower, including the peak, cross arms, cage, and body. It also lists several design considerations for transmission towers, such as minimum ground clearance, insulator length, conductor and tower clearances, and mid-span clearance. The total tower height is calculated by adding the minimum ground clearance, maximum sag of conductors, vertical spacing between conductors, and clearance between the ground wire and top conductor.

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Senthur Kumar
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82 views5 pages

Peak of Transmission Tower: Conductor

The document describes the main components of a transmission tower, including the peak, cross arms, cage, and body. It also lists several design considerations for transmission towers, such as minimum ground clearance, insulator length, conductor and tower clearances, and mid-span clearance. The total tower height is calculated by adding the minimum ground clearance, maximum sag of conductors, vertical spacing between conductors, and clearance between the ground wire and top conductor.

Uploaded by

Senthur Kumar
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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The main parts among these are shown in the pictures.

Peak of Transmission Tower


The portion above the top cross arm is called peak of transmission
tower. Generally earth shield wire connected to the tip of this peak.
Cross Arm of Transmission Tower
Cross arms of transmission tower hold the transmission conductor.
The dimension of cross arm depends on the level of transmission
voltage, configuration and minimum forming angle for stress
distribution.
Cage of Transmission Tower
The portion between tower body and peak is known as cage of
transmission tower. This portion of the tower holds the cross arms.
Transmission Tower Body
The portion from bottom cross arms up to the ground level is called
transmission tower body. This portion of the tower plays a vital role
for maintaining required ground clearance of the
bottom conductor of the transmission line.
Design of Transmission Tower
During design of transmission tower the following points to be
considered in mind,
The minimum ground clearance of the lowest conductor point
above the ground level.
The length of the insulator string.
The minimum clearance to be maintained between conductors
and between conductor and tower.
The location of ground wire with respect to outer most
conductors.
The mid span clearance required from considerations of the
dynamic behavior of conductor and lightening protection of the
line.
To determine the actual transmission tower height by considering
the above points, we have divided the total height of tower in four
parts,
1. Minimum permissible ground clearance (H1)
2. Maximum sag of the conductor (H2)
3. Vertical spacing between top and bottom conductors (H3)
4. Vertical clearance between ground wire and top conductor (H4).

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