What is overhead catenary?

What is overhead catenary?

• A. A device on the roof of a train that collects power from overhead lines.
• B. A signaling indicator in the control room.
• C. The system of overhead wires that supplies electric power to trains via a pantograph or collector.
• D. A method of braking energy recovery.

Answer: (C)

Overhead catenary is the fixed network of overhead wires that provides electric power to trains. It includes the wires suspended above the tracks, along with the support and tensioning hardware, substations, and feeders that keep the system energized and correctly aligned. The train individual equipment that draws power—such as a pantograph or other collector—rests against this overhead wire to take in electricity as the train moves. So this term refers to the infrastructure, not the device on the train itself. That’s why describing overhead catenary as the system of overhead wires that supplies electric power to trains via a pantograph or collector is the correct interpretation. The other options point to things that are not the power-delivery network: the pantograph itself is the on-train pickup device, a signaling indicator in the control room is unrelated to the overhead power system, and regenerative braking is about energy recovery, not the overhead supply.

Overhead catenary is the fixed network of overhead wires that provides electric power to trains. It includes the wires suspended above the tracks, along with the support and tensioning hardware, substations, and feeders that keep the system energized and correctly aligned. The train individual equipment that draws power—such as a pantograph or other collector—rests against this overhead wire to take in electricity as the train moves. So this term refers to the infrastructure, not the device on the train itself.

That’s why describing overhead catenary as the system of overhead wires that supplies electric power to trains via a pantograph or collector is the correct interpretation. The other options point to things that are not the power-delivery network: the pantograph itself is the on-train pickup device, a signaling indicator in the control room is unrelated to the overhead power system, and regenerative braking is about energy recovery, not the overhead supply.