Patent ID: 6735534
Filing Date: 2004-05-11
Classification: H02H

Abstract:
A recloser control system for a three-phase electrical power line, comprising:a recloser having three poles, each pole corresponding to an associated one of the three phases of the power line and being capable of opening or closing the associated phase of the power line; and a recloser controller coupled to the recloser for controlling the setting of the poles depending on the line current appearing in the phases on the power line, one pole opening the associated phase of the power line if the line current on only the associated phase exceeds an associated predetermined current, and all poles opening all the associated phases of the power line if the line current on more than one phase exceeds the associated predetermined current, and if only one fault is present, then monitoring the fault to determine if the fault evolves into another phase, and if so, opening all three phases of the recloser, wherein the recloser controller comprises a countdown timer for each faulted phase for determining whether a phase that has entered a pickup state should be tripped.