What is the role of stanchions in the overhead traction power system?

• A. They house the traction motors
• B. They convert DC to AC
• C. They provide passenger lighting
• D. They support the overhead system and keep the wire in position

Answer: (D)

The key idea is how the overhead power line is held up and kept in the right place. Stanchions are the vertical supports that run along the track, carrying the weight and tension of the overhead system. They hold the contact wire at the correct height and alignment, keeping it in the proper position so the train’s pantograph or collector shoe can reliably draw power. They also help maintain the required clearance from trains and structures and resist wind and motion while the train passes.

They don’t house traction motors, which are parts of the train itself. They don’t convert DC to AC, which is done by electrical equipment on the train or in substations. And they don’t provide passenger lighting. The role of stanchions is specifically to support the overhead system and keep the wire in position.