Analysis Of Rust On High-voltage Disconnect Switches

High Voltage Disconnect Switch is usually installed in substations or transmission line environments. Due to long-term exposure to changes in air, humidity and temperature, the surface of the metal parts gradually oxidizes and corrodes, which has a certain impact on the operating status. Once corrosion occurs on conductive components or mechanical transmission structures, it can further lead to problems such as poor contact or abnormal mechanical operation.

The Impact of Operating Environment on Corrosion

In outdoor power equipment operation, environmental factors are often a significant source of corrosion for high-voltage disconnect switches. In areas with high air humidity or frequent rainfall, an oxide layer easily forms on metal surfaces, which gradually transforms into corrosion over time. After rainwater immersion, some devices may experience rust at connecting parts such as shaft pins and sleeves, affecting the relative movement between components. When corrosion worsens in these areas, mechanical resistance increases, and the obstruction of equipment opening and closing operations becomes more pronounced.

Characteristics of Corrosion Locations

During operation and maintenance inspections, corrosion of high-voltage disconnect switches is typically concentrated in the following structural locations:

• Conductive contact surfaces: Oxidation or corrosion occurs on the metal contact surface, gradually increasing contact resistance and causing fluctuations in conductivity.

• Shafts and connectors: Prolonged exposure to humid environments causes rust to form on shafts, pins, and sleeves, affecting the smoothness of mechanism operation.

• Fasteners and supporting components: Bolts and metal brackets corrode in windy and rainy environments, resulting in rust spots or surface peeling in localized areas.

When corrosion exists in the contacts or connecting structures of high-voltage disconnect switches, unstable contact can easily occur, leading to overheating or decreased conductivity. As operating time increases, the corrosion layer gradually thickens, affecting the overall operating condition of the equipment.