What is Rod Gap Arrester? – Construction, Advantages | New Topic [2024]

In this note, we are going to learn about Rod Gap Arrester, Construction and Advantages as well. Welcome to Poly Notes Hub, a leading destination for Polytechnic Notes for Diploma Engineering Notes.

Author Name: Arun Paul.

What is Rod Gap Arrester?

It is a device that protects electrical power networks from overvoltage circumstances, notably those produced by lightning strikes. It comprises two metal rods that are parallel and separated by a small air space. When a high voltage surge, such as that caused by lightning, occurs, the air between the rods breaks down and carries the surge to the ground, safeguarding the equipment downstream. These are a simple and effective type of surge prevention widely utilized in substations and other high-voltage applications.

Construction of Rod Gap Arrester

Below we discuss in detail about Rod Gap Arrester Construction or Rod Gap Arrester Diagram –

• Metal Rods: Two metal rods, often made of copper or aluminum, are placed parallel to one another at a predetermined distance apart.
• Mounting Structure: To maintain electrical isolation from the surrounding environment, the rods are supported by an insulating mounting framework, which is often composed of porcelain or polymer materials.
• Air Gap: Between the two metal rods, a small air gap is maintained at a specified distance. This gap is critical because it controls the voltage at which the arrester discharges.
• Connecting Hardware: Connectors and fittings are needed to connect the arrester to the electrical system that it is designed to protect.

Advantages of Rod Gap Arrester

Below we listed some Rod Gap Arresters Advantages –

1. It is consist of few components.
2. The cost is very low.
3. It can easily handle very high voltage.
4. Maintenance cost is very low.
5. These are highly durable and can withstand harsh environmental conditions.