When a device is known as a sectionalizer, what is its primary function?

A sectionalizer is primarily designed to isolate faults in a power distribution system. Its main function is to detect and separate a faulty section of the electrical circuit from the rest of the system, allowing for continued operation in unaffected areas. This capability is crucial for maintaining service reliability, as it enables utility companies to address issues without experiencing widespread outages. Sectionalizers work by coordinating with protective devices, such as circuit breakers or fuses, and ensure that when a fault is detected, the sectionalizer operates to disconnect the damaged section almost immediately.

This function is essential during maintenance operations or in the event of an unexpected fault, as it aids in quickly restoring service by limiting the impact of faults to smaller sections of the network. By effectively isolating the fault, sectionalizers also help protect equipment and prevent further damage, thus ensuring safer operation and minimizing downtime.