When may the independent brake and the dynamic brake be used together?

The independent brake and the dynamic brake can be utilized together when starting or stopping and the speed is below the effective range of the dynamic brakes. This approach leverages the benefits of both braking systems: the independent brake provides immediate stopping power without relying on momentum, while the dynamic brake helps control speed by converting kinetic energy into electrical energy.

Using the independent brake in conjunction with the dynamic brake during these scenarios maximizes braking efficiency and enhances safety. It allows for smoother operation and better control over the train's speed, especially in situations where the dynamic brakes alone may not be effective due to low speed.

In other contexts, such as during an emergency situation or while descending a steep grade, relying too heavily on one brake type might not be ideal. Therefore, utilizing them together particularly during starting or stopping prevents excessive wear and ensures a balanced approach to braking.