



They are core overhead facilities that supply power to rail transit such as subways and light rails, and serve as key components of the traction power supply system.
Power Supply and Transmission:Supports catenary wires, stably transmits high-voltage alternating current (usually 25kV) to the train pantograph, and provides power for train operation.
Structural Support:Withstands loads such as catenary tension, wind forces, and ice accretion to ensure the structural stability of the entire power supply system.
Spatial Isolation:Through reasonable height and layout, it ensures safe distances between live wires, tracks, personnel, and equipment.