A lightning arrester (also called a surge arrester) is a protective device used in electrical systems to divert high-voltage lightning surges safely to the ground, preventing damage to equipment, buildings, and power systems.
⚡ What is a Lightning Arrester?
A lightning arrester is installed between the line and earth. When a lightning surge occurs, it provides a low-resistance path for the surge current to flow into the ground, protecting transformers, panels, and electrical devices.
⚙️ How It Works
Under normal conditions → acts as an insulator
During lightning/surge → becomes conductive
Diverts surge current to earth → restores normal condition
🔧 Types of Lightning Arresters
1. Rod Gap Arrester
Simplest type
Used in overhead transmission lines
Low cost but less reliable
2. Horn Gap Arrester
Uses two horn-shaped electrodes
Arc rises upward and extinguishes automatically
Common in substations
3. Valve Type Arrester
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6
Uses nonlinear resistors
High efficiency and reliability
Widely used in power systems
4. Metal Oxide Arrester (MOA)
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5
Most advanced type (ZnO based)
No spark gaps required
Fast response and high protection level
🏢 Where Lightning Arresters Are Used
Power transmission & distribution systems
Industrial plants (factories, refineries)
Telecom towers
Residential & commercial buildings
Solar power plants
🔒 Importance of Lightning Protection
Prevents equipment damage
Reduces fire risk
Ensures system reliability
Protects human life
📊 As per Standards
Lightning protection systems are designed according to:
IEC 62305
IS/IEC 62305
💡 Pro Tip (for Your Business – SN Engineering)
If you're working in lightning protection:
Focus on ESE lightning arresters + chemical earthing combo
Target industries in Gurgaon, Manesar, Delhi NCR
Offer complete solution (Design + Supply + Installation + Testing)
Follow IEC standards to win corporate tenders
