What indicates a successful startup after a trip?

The indication of a successful startup after a trip is primarily marked by the turbine reaching operational speed. This is a critical milestone in the startup sequence as it shows that the turbine has successfully overcome any initial resistance and has achieved the necessary RPM to begin functioning effectively. Meeting this operational speed is essential for the turbine to produce power and return to service after a trip event.

Before reaching operational speed, the turbine must complete various processes, such as ensuring that the fuel supply is intact and that all systems are in check. However, these actions serve as prerequisites or steps taken during the startup. The ultimate indication of success is the turbine getting to a point where it can safely operate and contribute to the overall power generation process.

While other factors like system checks and fuel supply are vital, they do not denote a successful startup on their own. Operational speed serves as the definitive sign that the turbine is now prepared to perform its intended function within the power plant.