Rod Type Lightning Arrester - Robust Overvoltage Protection
Overview
In the face of nature's formidable power, particularly lightning strikes, safeguarding critical electrical infrastructure is paramount. Our Rod Type Lightning Arrester offers a simple, highly effective, and robust solution for protecting medium and high voltage power systems, substations, and electrical equipment from destructive overvoltages caused by lightning and switching surges.
Utilizing a time-tested air-gap design, this arrester provides a controlled and low-impedance path to ground, diverting harmful surge currents away from valuable assets, thereby preventing damage, reducing downtime, and ensuring the continuity of power supply. Its inherent simplicity ensures high reliability and a long service life in even the harshest environmental conditions.
Key Features
Simple Air-Gap Design: Relies on the natural insulating properties of air, breaking down to form an arc during an overvoltage event and resealing once the surge has passed (provided follow current is interrupted by upstream protection).
High Withstand Voltage: Engineered to withstand system operating voltages while providing rapid spark-over at predetermined impulse levels.
Robust Construction: Manufactured with high-strength, weather-resistant insulating materials (e.g., porcelain or polymer composite) and corrosion-resistant electrode materials (e.g., copper, brass, or stainless steel).
Rapid Response Time: Designed for near-instantaneous spark-over when an overvoltage threshold is reached, ensuring immediate protection.
High Discharge Capacity: Capable of safely diverting significant lightning surge currents to ground, protecting connected equipment.
Visual Indication (Optional): Some designs allow for visual inspection of the air gap for signs of operation or damage.
Low Maintenance: Due to its passive design, it requires minimal maintenance beyond periodic visual inspection.
Versatile Mounting Options: Available in various configurations for pole, structure, or equipment mounting.
Cost-Effective Solution: Provides essential surge protection without the complexity and higher cost of more advanced arrester types for suitable applications.
Technical Specifications
Parameter
Value / Range (Typical)
Notes
Rated System Voltage (Ur)
3 kV - 36 kV (Medium Voltage)
Higher voltages available upon request.
Impulse Spark-over Voltage (Usw)
20 kV - 150 kV (Positive & Negative)
Designed to spark over below the insulation withstand level of protected equipment.
Power-Frequency Spark-over Voltage
1.5 - 2 times Ur
Ensures stability under normal operating conditions.
Rated Discharge Current (In)
5 kA, 10 kA, 20 kA (8/20 µs waveform)
Standard lightning impulse current waveform.
Short-Circuit Withstand Current
10 kA - 31.5 kA (for 0.2 s)
Ability to handle follow current before upstream breaker clears.
Industrial Power Systems: Ensuring the reliability of industrial electrical networks.
Railway Electrification Systems: Protecting traction substations and overhead lines.
Remote Installations: Where cost-effective and highly reliable protection is crucial.
Benefits
Enhanced System Reliability: Minimizes the risk of outages and service interruptions due to lightning strikes.
Extended Equipment Lifespan: Protects expensive electrical assets from damage, reducing repair and replacement costs.
Cost-Effective Protection: Provides a highly economical and efficient surge protection solution.
Simplified Integration: Easy to install and integrate into existing electrical infrastructure.
Robust & Durable: Built to withstand harsh environmental conditions and provide long-term protection.
Minimal Maintenance: Requires very little ongoing attention, contributing to lower operational costs.
Installation & Maintenance
Installation should always be performed by qualified personnel in accordance with local electrical codes and utility standards. Proper grounding is critical for the effective operation of the arrester. Regular visual inspections are recommended to check for any signs of physical damage, contamination, or evidence of operation (e.g., carbon tracking on insulators in some designs).
Ordering Information
To specify the correct Rod Type Lightning Arrester for your application, please provide the following details:
Rated System Voltage (kV)
Required Impulse Spark-over Voltage (kV)
Rated Discharge Current (kA)
Insulation Material preference (Porcelain / Polymer)
Mounting type and dimensions
Environmental conditions (pollution level, temperature range)
Contact our sales team today to discuss your specific requirements and receive a tailored quote.
Protect Your Assets. Ensure Continuity. Choose Our Rod Type Lightning Arresters.
