Time-Coordinating Protection Devices Over an Entire Reclose Sequence – A Generalized Approach
Time-current coordination of electrical distribution network protection equipment is necessary to minimize the extent of customer outages. Reclosing devices help clear temporary faults but complicate the coordination process for faults that last across several reclose attempts. Misoperations can occur if the reset characteristics of neighboring devices are not considered. This paper improves upon a method to ensure coordination between a fuse and recloser by making it easier to apply and extends it to coordination between two reclosing relays.