FIELD: power industry.
SUBSTANCE: invention relates to the field of electric power industry. According to the method, all half-sets of protection are blocked when forming a command to reclose the disconnected phase. In case of unsuccessful reclosing or in the event of a new damage after the operation of the maximum current of the forward sequence or the maximum current of the reverse sequence and its emergency component, half-sets of protection are immediately put into operation, and if the line is successfully closed in transit after the operation of the relay of the minimum current of the forward and reverse sequence and the three-phase relay of the phase current with a delay, the high-frequency channel is unblocked.
EFFECT: ensuring the selectivity of high-frequency protection during successful single-phase reclosing of power transmission lines.
1 cl, 1 dwg
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