Why Groundwire at the Centre of Electricity pylon?

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In summary, the groundwire is located at the center of an electricity pylon to provide protection for the transmission lines against lightning strikes and other electrical surges. It is not used as a conductor for electricity, but rather serves as a safe path for excess electricity to dissipate into the ground. The groundwire is typically made from a high-strength steel alloy and is necessary for all electricity pylons. It is connected to the ground through grounding rods or plates buried deep into the earth.
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abrowaqas
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We have noticed in various electricity pylons/towers that groundwire or shieldwire is always placed at the top and between the two conductors ?
why is that so?

If you look at the 220kV structures or 500kV structures of pylons, you will notice the groundwire is placed at the middle of conductors at top of the pylon?

is there any induction effect or any specific reason for that?
 
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The ground wire is there to intercept lightning. It is analogous to a lightning rod seen on rooftops. Sometimes there is more than one ground wire.
 

FAQ: Why Groundwire at the Centre of Electricity pylon?

Why is the groundwire located at the center of an electricity pylon?

The groundwire is located at the center of an electricity pylon because it serves as a protective measure for the transmission lines. In the event of a lightning strike or other electrical surge, the groundwire provides a path for the excess electricity to safely dissipate into the ground, preventing damage to the transmission lines and other equipment.

Does the groundwire act as a conductor for electricity?

No, the groundwire does not act as a conductor for electricity. Its main purpose is to provide a safe path for excess electricity to dissipate into the ground. The transmission lines themselves act as the primary conductors for electricity.

Can the groundwire be made from any material?

The groundwire is typically made from a high-strength steel alloy, as it needs to be able to withstand the weight of the transmission lines and the force of strong winds. Other materials such as aluminum or copper may also be used, but they are less commonly used due to their lower strength and higher cost.

Is the groundwire necessary for all electricity pylons?

Yes, the groundwire is necessary for all electricity pylons. It is a standard safety feature in the design of transmission lines, and its absence can significantly increase the risk of damage to the lines and surrounding equipment in the event of a lightning strike or other electrical surge.

How is the groundwire connected to the ground?

The groundwire is connected to the ground through a series of grounding rods or plates buried deep into the earth. These grounding systems provide a low-resistance path for the excess electricity to flow into the ground, effectively grounding the transmission lines and protecting them from damage.

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