What type of circuit breaker is found in a DMB?

In a Dynamic Motor Brake (DMB) system, the correct type of circuit breaker utilized is indeed linked to the operational requirements of the system. The CCTV (Circuit Control and Monitoring) circuit breaker is designed to provide protection and control for critical components of the traction system, including those involved in dynamic braking applications.

CCTV circuit breakers offer the necessary features to monitor circuit conditions and ensure safe operation, as they can react to fault conditions within milliseconds, acting as a safeguard for the electrical components. This capability is particularly important in traction applications where reliable performance and responsiveness are essential for safe and efficient operation.

The other options like PA, Static Inverter, and Auxiliary circuit breakers serve different functions and are not specifically associated with the control and protection needs of dynamic braking systems. Thus, CCTV is the specialized choice for ensuring the integrity and protection of DMB operations.