(Applicable for AC 0~220kV Power Transmission Lines)

1. Product Overview

The Electromagnetic Induction Power-Line Warning Light (also known as High-Voltage Warning Light or Anti-External-Damage Warning Light for Transmission Lines) is a safety warning device installed on high-voltage overhead transmission lines. This device obtains operating power through electromagnetic induction from the alternating magnetic field surrounding the conductor, eliminating the need for external mains power or solar panels. It provides all-weather high-voltage warning functionality and is widely used in accident-prone sections such as high-voltage lines crossing highways, railways, bridges, rivers, and construction zones.

2. Working Principle

2.1 Electromagnetic Induction Power Harvesting

The device employs a current transformer (CT/TA) made of high-permeability magnetic materials (such as silicon steel or amorphous alloy) to harvest AC electrical energy from the alternating magnetic field surrounding the high-voltage conductor. The induced voltage is then processed through rectification, filtering, voltage regulation, and energy storage circuits to output stable DC voltage for device operation. This power harvesting method offers advantages including stable power supply, weather independence, and maintenance-free operation.

2.2 Intelligent Light Control

A built-in high-sensitivity photosensitive chip continuously monitors ambient light intensity. The LED warning light automatically activates when ambient brightness falls below the set threshold, and automatically turns off during high-brightness daytime conditions, achieving intelligent energy-saving operation.

2.3 High-Brightness LED Flashing Warning

High-brightness red LED chips are employed, flashing at frequencies most sensitive to the human eye (typically 1~2Hz). Red light offers strong penetration at night with a visible distance exceeding 800 meters, effectively alerting passing vehicles, pedestrians, and construction personnel to high-voltage hazards.

3. Main Technical Parameters

4. Functional Features

Self-Powered Technology: No external power source required. Electrical energy is harvested through electromagnetic induction from the conductor, providing stable and reliable power supply. The device can operate normally even under low line current conditions, unaffected by rainy or cloudy weather.

Equipotential Insulation Design: Utilizing equipotential design principles, the device has no adverse effect on high-voltage line operation. Supports live-line installation and removal without power outage.

High-Brightness LED Light Source: Imported high-brightness LED chips offer high luminance, strong penetration, and long service life. The nighttime warning effect is significant with extended visible distance.

Intelligent Light Control System: Automatically recognizes day-night transitions. Activates automatically in low-brightness environments and shuts off in high-brightness environments, achieving intelligent energy-saving operation.

All-Weather Protection: The enclosure is made of high-strength engineering plastic or aluminum alloy, resistant to high temperatures, water, dust, ultraviolet radiation, and aging. Adaptable to complex and harsh environments including rain, snow, ice, oil, and salt spray.

Maintenance-Free Design: No frequent maintenance required after installation. No wearing parts, significantly reducing operation and maintenance costs.

Modular Structure: Compact structure with simple installation. Snap-fit or bolt-type fixation adapts to conductors of different specifications.

5. Application Scenarios

• High-voltage transmission lines crossing highways, railways, and expressways
• High-voltage transmission lines crossing bridges, rivers, and canyons
• High-voltage lines near construction zones, residential areas, and schools
• High-voltage line warning in nighttime and low-visibility conditions (fog, rain, snow)
• Sections where over-height vehicles or construction machinery may accidentally contact high-voltage lines
• Anti-collision warning for towers, transformers, and distribution facilities

6. Reference Product Models

7. Purchasing Recommendations

1. Voltage Level Matching: Confirm that the applicable voltage range marked on the product covers your line voltage (0~220kV).
2. Startup Current Requirement: Induction-powered products typically require a minimum load current (e.g., 3A or 5A) to start. Verify the actual operating current of your line.
3. Installation Method: Choose products supporting live-line installation to avoid power outage impact on normal supply.
4. Function Expansion: For active warning functionality, select models with radar detection, microwave sensing, or voice alarm.
5. Authority Certification: Prioritize products tested and certified by national authorities (such as China Electric Power Research Institute, WHVRI, etc.).
6. After-Sales Service: Select manufacturers with comprehensive after-sales service systems to ensure long-term stable operation.

8. Precautions

1. Before installation, confirm the line voltage level and load current, and select a matching product model.
2. Installation personnel must possess high-voltage live-line operation qualifications and strictly comply with safety operation procedures.
3. After installation, regularly inspect whether the LED light operates normally to ensure effective warning functionality.
4. Unauthorized disassembly or modification is strictly prohibited to avoid compromising insulation and safety performance.
5. Special inspections should be conducted after extreme weather conditions (such as super typhoons or severe hailstorms).