Final answer:
A recloser can operate a predetermined number of times from open to close before it locks out, making the answer a. Open, Close. These devices are critical for maintaining electrical system reliability.
Step-by-step explanation:
A recloser is a type of electrical switch that can automatically close after an interruption in the current and subsequently open if the problem persists. To answer your question, a recloser can operate a predetermined number of times open to close and "locks out". Therefore, the correct answer is a. Open, Close.
Reclosers are crucial components in electrical distribution networks to protect the system and ensure reliability. They work by attempting to restore service after short interruptions. If the fault is temporary, the recloser helps maintain continuous service. However, if the fault remains after a set number of open-close cycles, the recloser will "lock out" and interrupt the electric circuit to prevent damage, at which point human intervention is required to solve the problem and reset the device.