The 500 kV pull tower is a critical component in high-voltage power transmission, ensuring the stability and safety of the entire line. Proper inspection of these towers is essential to identify potential structural issues, hardware wear, and conductor conditions before they lead to operational failures. This guide outlines the key inspection points and industry standards, providing a comprehensive reference for engineers and UAV inspection teams to maintain the reliability and efficiency of 500 kV transmission lines.
| Serial Number | Inspection points | Shooting quality requirements | Software checkpoint screenshot | Real Inspection Point Images |
|---|---|---|---|---|
| 1 | Full Tower View | The full tower view should be complete, clearly showing tower materials and angles, with the main subject occupying at least 80% of the vertical frame. |  | |
| 2 | Tower Head | The tower head must be fully visible. |  | |
| 3 | Tower Body | All structures except the tower head and tower base must be visible. |  | |
| 4 | Pole Number Plate | The dual-line names on the pole number plate must be clearly distinguishable. |  | |
| 5 | Tower Base and Ground Guy Wires | The ground condition near the tower base must be clear, and guy wires must be firmly connected. |  | |
| 6 | Left Phase Conductor End Hanger | Bolts, nuts, locking pins, and vibration dampers must be clearly visible. Use multiple angles if equipment overlaps. Each photo should include at least one insulator. |  | |
| 7 | Left Phase Insulator String | The full insulator string must be covered. Multiple photos may be taken to clearly show surface damage and connections of each insulator. |  | |
| 8 | Left Phase Cross-arm Hanger | Bolts, nuts, locking pins, and small hardware must be clearly visible. Use multiple angles if equipment overlaps. Each photo should include at least one insulator. |  | |
| 9 | Left-side Guy Wire Hanger | Bolts, nuts, locking pins, and small hardware must be clearly visible. Use multiple angles if equipment overlaps. |  | |
| 10 | Left-side Ground Wire | The combination installation of all hardware must be identifiable, as well as the aluminum tape installation at contact points. Nuts and pins at locking positions must be clearly visible. Use multiple angles if equipment overlaps. |  | |
| 11 | Middle Phase Cross-arm Hanger | Bolts, nuts, locking pins, and small hardware must be clearly visible. Use multiple angles if equipment overlaps. Each photo should include at least one insulator. |  | |
| 12 | Middle Phase Insulator String | The full insulator string must be covered. Multiple photos may be taken to clearly show surface damage and connections of each insulator. |  | |
| 13 | Middle Phase Conductor End Hanger | Bolts, nuts, locking pins, and vibration dampers must be clearly visible. Use multiple angles if equipment overlaps. Each photo should include at least one insulator. |  | |
| 14 | Right-side Ground Wire | The combination installation of all hardware must be identifiable, as well as the aluminum tape installation at contact points. Nuts and pins at locking positions must be clearly visible. Use multiple angles if equipment overlaps. |  | |
| 15 | Right Phase Cross-arm Hanger | Bolts, nuts, locking pins, and small hardware must be clearly visible. Use multiple angles if equipment overlaps. Each photo should include at least one insulator. |  | |
| 16 | Right Phase Guy Wire Hanger | Bolts, nuts, locking pins, and small hardware must be clearly visible. Use multiple angles if equipment overlaps. |  | |
| 17 | Right Phase Insulator String | The full insulator string must be covered. Multiple photos may be taken to clearly show surface damage and connections of each insulator. |  | |
| 18 | Right Phase Conductor End Hanger | Bolts, nuts, locking pins, and vibration dampers must be clearly visible. Use multiple angles if equipment overlaps. Each photo should include at least one insulator. |  | |
| 19 | Small-side Passage | The tower passage should be fully visible, including buildings, trees, crossings, and lines being spanned. |  | |
| 20 | Large-side Passage | The tower passage should be fully visible, including buildings, trees, crossings, and lines being spanned. |  |
