How are sectionalizers coordinated with other devices?

Sectionalizers are devices used in electrical distribution systems to isolate faults and restore service. They work in conjunction with reclosers to create a coordinated system for handling faults. When a fault occurs, the recloser first attempts to clear the fault by temporarily interrupting power. If the fault is persistent, the recloser will remain open for a specified time before locking out the circuit. In this time frame, the sectionalizer monitors the flow of current. If the recloser has opened due to a fault, the sectionalizer will also open, effectively isolating the faulted section of the circuit. This coordination allows for maximum service restoration and minimum downtime, maintaining reliability in the electrical grid.

Using sectionalizers alongside reclosers minimizes the impact of faults on the overall system and helps in effective fault management, which is crucial for maintaining operational efficiency in power distribution.