What relay state is required for the yellow aspect in the control system?

What relay state is required for the yellow aspect in the control system?

• A. TP energized and DV in cycle check
• B. HV de-energized and DV energized
• C. HV energized and DV de-energized
• D. H and V in the clear

Answer: (C)

The yellow aspect in a control system typically indicates a cautionary state, meaning that certain conditions must be met to ensure safety and proper operation. For the yellow aspect to be displayed, particular relay states are required that signify the system's readiness for action while also indicating that some caution should be taken. When the correct answer states that HV (high voltage) must be energized and DV (diverting voltage) must be de-energized, it underscores a scenario where the system is active but is set up in a way that allows for cautious maneuvering—thus allowing operators to prepare for a transition or a potential change in state. The energized HV relay indicates that power is available, which is essential for operations, while the de-energized DV signifies that there may be restrictions or specific conditions that need to be assessed before proceeding. This combination ensures that the system is signaling a yellow aspect, as it alerts operators that while power is available, they should remain vigilant, since the DV being de-energized could imply that any diversion or movement may be limited or require confirmation of safety before proceeding. Hence, this state is critical for maintaining safe operations.

The yellow aspect in a control system typically indicates a cautionary state, meaning that certain conditions must be met to ensure safety and proper operation. For the yellow aspect to be displayed, particular relay states are required that signify the system's readiness for action while also indicating that some caution should be taken.

When the correct answer states that HV (high voltage) must be energized and DV (diverting voltage) must be de-energized, it underscores a scenario where the system is active but is set up in a way that allows for cautious maneuvering—thus allowing operators to prepare for a transition or a potential change in state. The energized HV relay indicates that power is available, which is essential for operations, while the de-energized DV signifies that there may be restrictions or specific conditions that need to be assessed before proceeding.

This combination ensures that the system is signaling a yellow aspect, as it alerts operators that while power is available, they should remain vigilant, since the DV being de-energized could imply that any diversion or movement may be limited or require confirmation of safety before proceeding. Hence, this state is critical for maintaining safe operations.