(For Electromagnetic Induction Power-Line Warning Lights)  

Chapter 1 Pre-Installation Preparation

1.1 Personnel Qualification Requirements

• Installation personnel must hold a high-voltage live-line work qualification certificate and be familiar with electrical safety work regulations.
• At least 2 certified workers are required: 1 operator and 1 supervisor.
• Workers must be in good physical and mental condition, free from alcohol influence or fatigue.
• A safety technical briefing must be conducted before work, clarifying division of labor and responsibilities.

1.2 Tools and Materials Preparation

1.3 Site Survey

• Confirm line voltage level (0.4kV~220kV) and verify the warning light applicable voltage range.
• Measure conductor diameter (Φ8mm~Φ35mm) and confirm mounting bracket/clamp specifications match.
• Confirm line load current to ensure it exceeds the warning light minimum startup current (typically ≥3A).
• Inspect installation location surroundings: prioritize accident-prone areas such as highway crossings, bridge crossings, and construction zones.
• Ensure the installation location is free of obstructions with adequate working space.
• Check weather forecast; strictly prohibit work during thunderstorms, strong winds (≥Beaufort Scale 6), or other severe weather conditions.

1.4 Product Inspection

• Inspect warning light exterior for damage, cracks, or deformation.
• Check LED chips for integrity, no detachment or discoloration.
• Check induction power coil (CT) for open circuit or short circuit.
• Verify mounting bracket, clamp, bolts, and other accessories are complete.
• Use multimeter to measure induction coil resistance and confirm it is within normal range.
• Verify product nameplate parameters: model, voltage rating, startup current, etc.

Chapter 2 Installation Procedures

2.1 Safety Protection Measures

• Set up safety warning signs at both ends of the work area and assign a dedicated supervisor before work begins.
• Workers must wear full insulating protective equipment: insulating gloves, insulating boots, safety helmet, and safety harness.
• Maintain safe distance from energized conductors when approaching with insulated aerial work platform:

2.2 Method 1: Live-Line Installation via Insulated Aerial Work Platform (Recommended)

Step 1: Positioning: Park the insulated aerial work platform directly below the conductor at an appropriate position with outriggers firmly supported. Workers wearing insulating protective equipment enter the insulated bucket and raise to the conductor installation height.

Step 2: Mounting Bracket Fixation: Place the warning light mounting bracket (or clamp) over the conductor, using the insulating operating rod for auxiliary positioning. Ensure the bracket opening direction is correct and the conductor is centered in the bracket.

Step 3: Bolt Tightening: Use a torque wrench to gradually tighten mounting bolts in diagonal sequence according to product specifications (typically 15~25N·m). Ensure the bracket is in tight contact with the conductor with no looseness.

Step 4: Warning Light Unit Installation: Align the warning light unit with the mounting bracket slot or connection holes and push into place. Secure connection bolts with hex key wrench and confirm correct light orientation (LED face downward or toward warning direction).

Step 5: Induction Power Coil Installation: Place the current transformer (CT) over the conductor, ensuring the conductor passes through the center hole of the CT. Secure the CT housing and check for good contact between the coil and conductor.

Step 6: Inspection and Testing: Confirm all connections are secure with no looseness or detachment. Cover the photosensitive sensor with hand to simulate nighttime environment and observe whether the LED flashes normally.

Step 7: Withdrawal: Clean up the work site and recover tools. Workers slowly lower the insulated bucket and withdraw to a safe area.

2.3 Method 2: UAV-Assisted Live-Line Installation

Step 1: UAV Preparation: Select an industrial-grade UAV with payload capacity ≥5kg and install a dedicated mounting device. Pre-assemble the warning light unit with the mounting bracket to ensure structural integrity.

Step 2: Flight Positioning: Control the UAV to slowly ascend to the conductor installation position, maintaining a safe distance ≥3m from energized conductors. Adjust UAV position so the warning light aligns with the target conductor.

Step 3: Hanging Operation: Use the UAV mounting device’s robotic arm or clasp mechanism to hang the warning light onto the conductor. Some products use a safety hanging strap design where the strap loops over the conductor and connects to the light body for fixation.

Step 4: Locking Confirmation: Observe via UAV camera to confirm the mounting bracket is locked and the warning light is stable without swaying. If equipped with an electric locking mechanism, remotely control the locking operation.

Step 5: Return and Inspection: The UAV slowly withdraws and hovers at a safe distance to observe the warning light installation status. Return and land after confirmation.

Step 6: Ground Verification: Observe whether the warning light flashes normally at night to confirm successful installation.

[UAV Installation Advantages] Suitable for complex terrain areas inaccessible by insulated aerial work platforms (such as mountainous regions or above rivers). Lines below 40 meters can be completed within 2 minutes, significantly improving operational efficiency, reducing labor and material costs, and effectively reducing transmission line tripping rates.

2.4 Method 3: Insulating Operating Rod Installation (For Lower Voltage Levels)

Step 1: Pole Positioning: Workers climb the pole to the conductor cross-arm position and secure the safety harness to the pole.

Step 2: Pre-Assembly: Pre-assemble the warning light with the mounting bracket on the ground and hoist it to the pole using an insulating rope.

Step 3: Hanging and Fixation: Use the insulating operating rod to hang the mounting bracket onto the conductor and tighten the fixing bolts through the rod’s rotation mechanism.

Step 4: Inspection Confirmation: Visually inspect installation firmness and confirm correct warning light orientation.

Chapter 3 Post-Installation Inspection and Testing

3.1 Mechanical Inspection

• Check that the mounting bracket/clamp is in tight contact with the conductor with no looseness or sliding.
• Check that all bolts are tightened to specified torque with none missing.
• Check that the warning light unit is not tilted or swaying and the installation orientation is correct.
• Check that the induction power coil (CT) is concentric with the conductor without misalignment.
• Check that the safety hanging strap (if applicable) is securely connected without wear or breakage.

3.2 Electrical Testing

• Confirm line load current ≥ warning light minimum startup current (typically 3A~5A).
• Use multimeter to measure induction coil output voltage and confirm it is within normal range.
• Cover the photosensitive sensor with hand and observe whether the LED flashes normally.
• Remove the cover and observe whether the LED turns off in daytime environment.
• Observe LED flashing frequency and brightness at night to verify visible distance meets requirements.
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3.3 Acceptance Criteria

Chapter 4 Safety Precautions

1. Strictly Prohibit Unqualified Personnel: Personnel without high-voltage live-line work qualifications are strictly prohibited from performing installation work.
2. Strictly Prohibit Work in Adverse Weather: Pole climbing or high-altitude work is strictly prohibited during thunderstorms, strong winds (≥Beaufort Scale 6), heavy fog, and other severe weather conditions.
3. Maintain Safe Distance: Always maintain minimum safe distance from energized conductors during work; ≥3.0m for 220kV lines.
4. Proper Use of Insulating Tools: Insulating tools must be inspected for integrity before use and regularly subjected to insulation withstand voltage tests.
5. Prevent Induced Electric Shock: Workers must maintain sufficient insulation from grounding bodies to prevent electrostatic and electromagnetic induction shocks.
6. Prevent Falls: Safety harnesses must be used for high-altitude work, attached high and used low, secured to sturdy structural members.
7. Prevent Tool Drops: Tools must be secured with insulating ropes; throwing tools or materials is strictly prohibited.
8. Prevent Accidental Contact with Adjacent Phases: When working on multi-circuit lines, maintain safe distance from adjacent phase conductors; add insulating shields if necessary.
9. Emergency Response: In case of emergencies (equipment failure, weather changes), immediately stop work and withdraw to a safe area.
10. Work Supervision: Dedicated supervisor must be present throughout the operation; the supervisor must not participate in the work and must closely monitor worker status.

Chapter 5 Maintenance

5.1 Routine Inspection

• Conduct at least one visual inspection per month to check warning light exterior integrity and installation firmness.
• During nighttime inspections, observe whether LED flashing is normal and whether brightness has degraded.
• Check housing for cracks, damage, or aging.
• Check mounting brackets and bolts for corrosion or looseness.

5.2 Annual Maintenance

• Comprehensively inspect mounting bracket tightness and re-tighten loose bolts.
• Clean warning light housing surface of dirt, bird droppings, and other contaminants.
• Inspect induction power coil insulation condition and measure coil resistance.
• Check LED chip working status and replace failed chips.
• Check photosensitive sensor sensitivity and clean sensor surface.
• Inspect waterproof sealing strips/gaskets and replace if necessary.
• Apply anti-rust grease at bolt connections.

5.3 Troubleshooting

Chapter 6 Appendices

Appendix A: Installation Diagram Descriptions

[Diagram 1] Live-line installation via insulated aerial work platform: Platform → Workers → Bucket → Conductor → Warning Light
[Diagram 2] UAV-assisted installation: UAV → Mounting Device → Warning Light → Conductor
[Diagram 3] Warning light structure: LED Face → Photosensitive Sensor → CT Power Coil → Mounting Bracket → Safety Strap
[Diagram 4] Installation location: High-voltage conductors crossing highways/bridges/construction zones

Appendix B: Relevant Standards and Regulations

1. GB 26859-2011 “Electrical Safety Work Regulations – Power Line Part”
2. DL/T 741-2019 “Operation Regulations for Overhead Transmission Lines”
3. GB/T 2900.55-2016 “Electrotechnical Terminology – Live Working”
4. DL/T 877-2004 “Test Guidelines for Insulating Tools Used in Live Working”
5. GB 50061-2010 “Design Code for 66kV and Below Overhead Power Lines”

Appendix C: Installation Record Form (Template)