A Locally Set Switch (LSS) is a switch that can be manually operated by railway workers at the switch point to change the direction of a train on a track. It is commonly used in situations where a train needs to be directed onto a different track, such as at a railway yard or a junction.
The LSS is typically a lever that is connected to the switch points. When the lever is moved to the desired position, it causes the switch points to move, allowing the train to be directed onto a different track. The switch points are designed to move smoothly and securely, ensuring that the train can safely change tracks.
In addition to being manually operated, LSS can also be equipped with detection devices that can signal to the train driver when the switch is in the correct position. This is known as a “trap point” and helps to prevent derailments by ensuring that the train is not directed onto a track that is occupied or out of service.
The use of LSS is a critical component of railway safety, as it allows railway workers to quickly and efficiently direct trains onto the appropriate tracks. However, it is important that railway workers are trained in the proper operation of LSS to ensure that it is used safely and effectively.
In recent years, there has been an increasing trend towards the use of remote-controlled switches, which allow railway workers to operate switches from a control center using a computer or other electronic device. However, LSS remains an important component of railway operations, particularly in situations where remote control is not possible or practical.
Overall, the Locally Set Switch is an essential component of railway infrastructure, allowing for the safe and efficient movement of trains on the track network. Its use requires a high degree of skill and training, and it remains a critical component of railway operations, even as remote-controlled switches become more prevalent in the industry.