When the disabled train is pushed by the assisting train, what is the powering and braking set up?

In the scenario where a disabled train is being pushed by an assisting train, the correct setup is that the assisting train will provide the power needed to move the disabled train, while the disabled train will engage its braking system. This configuration is crucial for maintaining control and ensuring safety.

When the assisting train powers forward, it generates enough force to push the disabled train. If both trains were to power simultaneously, it could cause issues with control and stability, particularly if the disabled train is not able to operate normally. The disabled train's brakes being engaged ensures that it does not unintentionally accelerate or become difficult to manage during the push operation. This set-up helps in controlling the overall speed and prevents potential accidents that might occur if both trains were powering at the same time.

Moreover, this arrangement allows for a smoother and more coordinated operation, where the disabled train, instead of contributing to propulsion, focuses solely on being safely moved without introducing additional complexity to the system.