What occurs when the MCBG breaker trips with the Generator supplying all loads?

When an MCBG (Main Circuit Breaker Generator) breaker trips while the generator is supplying all loads, the correct outcome is that AMCOP (automatic monitoring and control of power) enters an Auto Fail condition, and a Deadbus timer starts.

This situation arises because the tripping of the MCBG indicates a fault or an overload condition. In an Auto Fail condition, the monitoring system recognizes that the generator is unable to supply power, which is crucial for the continuity and reliability of the power supply. The Deadbus timer is initiated to monitor how long the busbar (the electrical conductor providing a common connection for several circuits) remains without power. This timer is important for managing the next steps in response to the loss of supply, such as switching to an alternate power source or enabling a backup system.

This outcome highlights the generator's inability to maintain load supply and the critical function of the monitoring system in managing sudden failures.