ACCESSORY MODULE PROVIDING A ZONE SELECTIVE INTERLOCKING INTERFACE EXTERNAL TO A TRIP UNIT, AND SYSTEM AND CIRCUIT INTERRUPTER INCLUDING THE SAME

摘要

A circuit interrupter includes a circuit breaker frame having an accessory compartment, a trip unit providing a zone selective interlocking function, and an accessory module. The accessory module includes a housing received by the accessory compartment of the circuit breaker frame, and a circuit housed by the housing. The circuit cooperates with the zone selective interlocking function of the trip unit to provide a zone selective interlocking interface external to the trip unit.