Across Miles, Protecting the Energy Artery

Transmission lines are characterized by numerous distributed points, long spans, and wide coverage. Towers and conductors are exposed to outdoor environments for extended periods and are affected by factors such as lightning strikes, contamination, mechanical tension, and load fluctuations. As a result, components such as conductor joints, compression sleeves, and jumper clamps are prone to overheating defects. Traditional manual tower-climbing inspections are inefficient, involve high safety risks, and make it difficult to achieve rapid full-line coverage.

• Inspection coverage is extensive, and manual tower climbing is time-consuming and labor-intensive.
• Traditional inspection methods make it difficult to detect hidden defects such as poor internal compression connections and broken strands.
• In complex terrains such as mountainous areas and river crossings, inspection is highly challenging.

Insulators are critical components in transmission lines that provide electrical insulation and mechanical support. Exposed to harsh conditions such as high voltage, intense ultraviolet radiation, contamination, and moisture over long periods, insulators may experience degraded insulation performance due to moisture ingress, aging, zero-value insulators, or uneven contamination distribution. This can result in localized heating or abnormal temperature rise, and in severe cases, may lead to major accidents such as pollution flashover or insulator string failure.

• Large numbers of insulators make individual inspection time-consuming and labor-intensive.
• Early-stage insulator defects exhibit only slight temperature differences, which cannot be identified by the naked eye.
• Traditional tower-climbing or power-off inspections are inefficient and involve high safety risks.

Transmission line fittings are key components that connect conductors, insulators, and towers, including clamps, spacers, vibration dampers, and strain clamps. Exposed to strong wind-induced vibration, high current loads, and corrosive environments over long periods, fittings are prone to loosening, wear, corrosion, or poor electrical contact, resulting in increased local resistance and abnormal temperature rise. If not addressed promptly, these issues may lead to serious accidents such as conductor breakage or line failure.

• Transmission line fittings are diverse in type and large in quantity, making individual manual inspection inefficient.
• Conventional inspection methods are prone to missed detections.
• High-altitude fittings are difficult to inspect at close range, resulting in high safety risks.