What is train derailment device?

A train derailment device, also known as a derail, is a piece of equipment used on railway tracks to intentionally derail a train or other rolling stock. The derailment device consists of a metal frame that is placed across one or more rails and a movable ramp that is attached to the frame at one end and rests on the track at the other end. When a train passes over the device, the leading wheel of the locomotive or car strikes the ramp and pulls the wheel off the track, causing the train to come to a stop.

Derails are typically used in yards, sidings, and other areas where trains need to be parked or stored. They are also used in emergency situations to prevent a train from colliding with another train or obstacle. Derailment devices are typically operated by railroad personnel, who use a key or a combination lock to unlock the device and move the ramp out of the way when a train needs to pass over the track.

Derailment devices can be made of steel, cast iron, or other durable materials. They are designed to withstand heavy loads and resist damage from weather and debris. The use of a derailment device is regulated by national and international safety standards to ensure the safety of train operations and personnel.