Mainline Railways was a British model railway brand that operated between 1976 and 1983, introduced by Palitoy, the...
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How do catenary systems cope with curved sections of track ?
Catenary systems are used to provide an overhead power supply for electric trains. They consist of a series of wires, known as catenary wires, which are suspended above the tracks and carry the electrical current to power the trains. When it comes to curved sections of track, catenary systems need to be designed and installed in a way that allows for smooth operation and minimal impact on the trains.
To cope with curved sections of track, catenary systems use a combination of flexible wires, tensioning devices, and specialized hardware. Here's how they work:
- Flexible wires: the catenary wires used in the system are designed to be flexible and capable of adapting to the curvature of the track. These wires are typically made of a lightweight and durable material, such as copper or aluminium, which allows them to bend and flex without breaking or losing their shape.
- Tensioning devices: to maintain the proper tension in the catenary wires, tensioning devices are installed at regular intervals along the track. These devices help to keep the wires taut and prevent sagging, which could lead to contact issues with the pantographs on the trains. The tensioning devices can be adjusted to accommodate the curvature of the track and ensure consistent tension across the entire catenary system.
- Specialized hardware: in curved sections of track, additional hardware is used to support the catenary wires and ensure they maintain the correct position. This hardware includes pulleys, brackets, and cantilever arms, which are strategically placed to guide the wires along the curvature of the track. These components help to minimize lateral movement of the wires and ensure they remain in the desired position, allowing the trains to pass smoothly underneath.
It's important to note that the design and installation of catenary systems for curved sections of track requires careful planning and engineering. Factors such as the radius of the curves, train speeds and electrical requirements all need to be taken into consideration to ensure safe and efficient operation.
In summary, catenary systems cope with curved sections of track by using flexible wires, tensioning devices, and specialized hardware. These components work together to allow the catenary wires to adapt to the curvature of the track, maintain proper tension, and provide a reliable power supply for electric trains.
Posted in: Power and control
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