A Conventional Lightning Arrestor, also known as a Franklin Rod, is a widely used lightning protection system designed to provide a safe path for high-voltage lightning discharges to the ground. It is an essential safety device for buildings, industrial plants, transmission towers, and other high-rise structures, protecting them from direct lightning strikes and reducing the risk of fire, equipment damage, and electrical hazards.

Conventional lightning arrestors are based on Benjamin Franklin’s principle of providing a preferred point for lightning to strike, safely directing the electrical charge into the ground through a well-designed earthing system.

How Does a Conventional Lightning Arrestor Work?

A Conventional Lightning Arrestor consists of the following main components:

1. Air Terminal (Lightning Rod) – A pointed metal rod installed at the highest point of a structure to attract lightning strikes.
2. Down Conductor – A low-impedance conductive pathway (copper/aluminum strip or wire) that safely directs the lightning current downward.
3. Grounding System – A well-designed earthing setup that disperses the lightning energy safely into the ground, minimizing risk.

When a thunderstorm generates an electrical charge, the lightning rod attracts the lightning strike and channels the discharge safely through the down conductor into the earthing system, preventing damage to buildings and electrical installations.

Key Features and Benefits

1. Effective and Proven Protection

Conventional lightning arrestors have been used for centuries, offering simple yet effective lightning protection by providing a direct and low-resistance path to the ground.

2. Cost-Effective Solution

This system is affordable compared to advanced alternatives, making it ideal for residential, commercial, and industrial applications.

3. Durable and Low Maintenance

Manufactured using copper, aluminum, or galvanized steel, these arrestors are highly durable, require minimal maintenance, and can last for decades with proper installation.

4. Compatible with All Structures

It can be installed on any building, including homes, offices, factories, warehouses, telecom towers, substations, and wind turbines.

Applications of Conventional Lightning Arrestors

✔ Residential and Commercial Buildings – Homes, apartments, offices, malls.
✔ Industrial Facilities – Factories, refineries, manufacturing plants.
✔ Power Plants & Substations – Protects electrical grids and transmission lines.
✔ Communication Towers – Prevents lightning damage to antennas and telecom systems.
✔ Solar and Renewable Energy – Ensures solar panel earthing and wind turbine safety.
✔ Historical Monuments & High-Rise Structures – Protects against fire hazards.