Optimizing circuit breaker instantaneous trip settings for selectivity and arc flash performance simultaneously

Abstract

This paper and presentation will discus analytical techniques and new technology that allow switchgear CBs to use sensitive instantaneous settings and maintain selectivity when using traditional electronic trips in switchgear and current limiting molded case circuit breakers, motor circuit protectors or fuses in downstream equipment. New developments in trip technology that allow systems designed with instantaneous protection while maintaining high levels of selectivity and arc flash protection are also discussed.