When is the cable twist device activated?

When is the cable twist device activated?

• A. When the control system fails to initiate the cable untwist function.
• B. When wind speed exceeds a threshold.
• C. During scheduled maintenance.
• D. When yaw position is within acceptable limits.

Answer: (A)

The situation tests a safety fallback mechanism: if the main control system fails to start the cable untwist action, the cable twist device kicks in to prevent the cable from twisting uncontrollably. This activation serves as a fail-safe, ensuring the system remains in a safe, controlled state even when the primary command isn’t executed. Wind speed thresholds and yaw positioning describe normal operating conditions or separate protective actions, not a fault that requires the twist device to engage. Maintenance is a manual activity, not an automatic fault-triggered response.

The situation tests a safety fallback mechanism: if the main control system fails to start the cable untwist action, the cable twist device kicks in to prevent the cable from twisting uncontrollably. This activation serves as a fail-safe, ensuring the system remains in a safe, controlled state even when the primary command isn’t executed.

Wind speed thresholds and yaw positioning describe normal operating conditions or separate protective actions, not a fault that requires the twist device to engage. Maintenance is a manual activity, not an automatic fault-triggered response.