Patent ID: 9379537
Filing Date: 2016-06-28
CPC Classification: G05B,H02H

Claim Text:
1. A power system comprising: a plurality of main circuit interrupters, each of said main circuit interrupters including: a number of tie circuit interrupters, at least one of said number of tie circuit interrupters including: a plurality of feeder circuit interrupters, each of said feeder circuit interrupters including: a circuit structured to block communication, at least when said at least one of said number of tie circuit interrupters has the open state, of the zone selective interlocking output of one of the feeder circuit interrupters having the line input electrically connected to the load output of said first one of said main circuit interrupters to the zone selective interlocking input of said different second one of said main circuit interrupters, and of the zone selective interlocking output of a different one of the feeder circuit interrupters having the line input electrically connected to the load output of said different second one of said main circuit interrupters to the zone selective interlocking input of said first one of said main circuit interrupters.