|
1. A method for isolating faults in an electrical distribution grid feeder, the feeder including a primary source with an adjacent breaker, a plurality of normally closed sectionalizing reclosers and a normally open tie point fault interrupter at an end opposite the primary source, the method comprising: providing, to the breaker, the sectionalizing reclosers and the tie point fault interrupter, a feeder topology and configuration parameters for device behavior including a fault count threshold for each of the sectionalizing reclosers and a number of preliminary pulses; opening the breaker or one of the sectionalizing reclosers to cut off power downstream in the feeder upon detecting a fault in the feeder; initiating pulse testing by the tie point fault interrupter upon detecting a loss of voltage; continuing pulse testing until a recloser opens based on a fault pulse count threshold, then closing the tie point fault interrupter, when the fault is a persistent fault which is present during all of the preliminary pulses; and opening the tie point fault interrupter and re-closing the open breaker or recloser when the fault clears during the preliminary pulses and the tie point fault interrupter is not configured for reinitiating faults.
|
