What type of brake application is a dynamic brake considered?

A dynamic brake is classified as a supplementary brake application because it is used to assist the primary braking system when additional braking force is required, without engaging the traditional friction brakes. It primarily utilizes the train's traction motors to generate resistance against the wheels, converting kinetic energy into electrical energy, which slows the train down.

Dynamic braking is particularly useful in controlling speed on descents or when approaching a stop, providing a method to reduce speed gradually and efficiently. This is distinct from an emergency brake application, which is typically a more abrupt and immediate response to situations that require quick stopping. While dynamic braking can function in various scenarios, its main purpose is to complement standard braking procedures, enhancing overall train control and safety.

Choosing the correct type of brake application emphasizes the importance of understanding how different braking systems contribute to overall train handling and safety protocols.