Under what condition should the independent brake not be used according to the guidelines?

The independent brake should not be used when the same results can be achieved with the dynamic brake because using the dynamic brake is often more efficient and helps to maintain better control of the train. The dynamic brake utilizes the traction motors to slow down the train, allowing for smoother deceleration while also generating electricity, which can be helpful in managing the overall braking system and energy consumption.

Using the independent brake in situations where dynamic braking is sufficient could lead to unnecessary wear and tear on the independent brake components and may not allow the operator to maximize braking efficiency. It also helps to keep the braking system’s load balanced, which is vital for maintaining safety and effective control while operating the train. This practice aligns with the objective of efficient train handling, as dynamic braking provides a method for achieving a controlled stop without heavily relying on the independent brake.