What is the duty cycle time for an igniter?

The duty cycle time for an igniter is crucial because it refers to the operational duration and rest period required to ensure reliable and safe igniter performance within a gas turbine system. The correct choice indicates a scenario where the igniter operates for 45 seconds, followed by an extended cooldown period of 30 minutes.

This extended cooldown time is significant as igniters can generate a substantial amount of heat, and allowing the component to cool sufficiently prevents overheating and potential damage. Furthermore, proper duty cycling provides assurance of the igniter's readiness for subsequent ignition attempts, optimizing its longevity and maintaining the efficiency of the gas turbine system.

The other options suggest different operational times and cooldown periods that do not align with the standard practices for igniter duty cycles. For instance, shorter cooldown periods may lead to overheating, while longer operational times could unnecessarily consume energy and wear the igniter out more quickly. Therefore, the combination of 45 seconds on and 30 minutes off reflects a balanced and effective cycle for sustained performance.