What configuration is necessary for the timer relay for ST?

What configuration is necessary for the timer relay for ST?

• A. H energized
• B. TP de-energized and TP energized advanced
• C. TP energized and HV de-energized
• D. HV in the clear

Answer: (B)

The correct choice focuses on the requirement for a timer relay in the context of line control systems. For a timer relay to function as needed in a specific operation, the configuration ensures that the system can accurately measure timing intervals and respond appropriately when actuated. In this option, having TP de-energized and TP energized advanced indicates that the timer relay must be in a specific state where its control inputs allow for proper measurement of time delays. The de-energized state suggests that the timer is ready to start its timing cycle once triggered, while the advanced energized state implies that the timer will have already advanced through part of its timing cycle or be activated to begin that cycle after specific preconditions are met. This configuration is crucial for the reliable operation of protective relays and other control mechanisms, ensuring they function as intended when subjected to network conditions and inputs from various sensors. Understanding these states is essential for ensuring the safe and effective operation of electrical systems, and they contribute to the overall integrity of line control and protection schemes. Other configurations listed do not meet the operational needs of a timer relay for the specific control functions required in this scenario.

The correct choice focuses on the requirement for a timer relay in the context of line control systems. For a timer relay to function as needed in a specific operation, the configuration ensures that the system can accurately measure timing intervals and respond appropriately when actuated.

In this option, having TP de-energized and TP energized advanced indicates that the timer relay must be in a specific state where its control inputs allow for proper measurement of time delays. The de-energized state suggests that the timer is ready to start its timing cycle once triggered, while the advanced energized state implies that the timer will have already advanced through part of its timing cycle or be activated to begin that cycle after specific preconditions are met. This configuration is crucial for the reliable operation of protective relays and other control mechanisms, ensuring they function as intended when subjected to network conditions and inputs from various sensors.

Understanding these states is essential for ensuring the safe and effective operation of electrical systems, and they contribute to the overall integrity of line control and protection schemes. Other configurations listed do not meet the operational needs of a timer relay for the specific control functions required in this scenario.