Power Plant Protection: Integrated Systems

Describe what logic diagrams are and how they can be used to represent functions carried out by plant protection equipment. Describe the functions of AND gates OR gates NOT gates and time delay (TD) gates in logic circuits. Describe what interlocks are and how the actions of interlocks associated with boiler operations are represented in logic diagrams. Describe how logic diagrams can be used to represent conditions that cause equipment trips. Identify conditions that can cause a boiler trip and describe how a logic diagram can be used to illustrate those conditions. Identify conditions that can cause a turbine trip and describe how a logic diagram can be used to illustrate those conditions. Identify conditions that can cause a generator trip and describe how a logic diagram can be used to illustrate those conditions. Describe how the protection systems for boilers turbines and generators are interrelated.