Minimum Recommended Protection, Interlocking and Control for Fossil Fuel Unit-Connected Steam Station I. Overall Protection

Minimum protection, interlocking and control of a fossil fuel unit connected steam station requires accurate sensing of the process variables, and coordinated interlocked tripping to prevent or minimize damage to the process. Equally important in preventive protection is logical sequences for starting and stopping the unit, containing interlocks and/or operating instructions to enforce the correct procedures. The paper covers the overall protection of a fossil fuel, unit-connected Boiler-Trubine-Generator unit and becomes part of a set of companion papers that describe the start-up by systems.