What happens if the train remains idle for more than the charged time limit?

When a train remains idle for more than the charged time limit, it risks losing air pressure. This is because the air brake system relies on maintaining a specific level of compressed air to function effectively. Over time, the air that has been charged begins to leak or deplete due to normal system processes. If the pressure drops below a certain threshold, it can lead to insufficient braking capability when the train resumes operation.

Understanding this concept is crucial for safe train handling, as inadequate air pressure can result in failures in braking performance, posing safety hazards during movement. Maintaining air pressure is a critical factor in ensuring that the train is ready to operate safely after a period of inactivity.