Patent Number: 6,297,939

Title: Zone selective interlock for a circuit breaker system

Abstract: A circuit breaker system 10 using electronic trip units 35. The electronictrip units 35 are coupled to a communications bus 30 whereby theelectronic trip units 35 can be reconfigured, controlled, and/or monitoredby a central computer 20. Further, the electronic trip units are coupledto a separate control power supply line 50 and to a zone selectiveinterlock system 70 . The zone selective interlock system 70 is configuredto provide tripping delays to circuit breakers located upstream from adetected fault.

Inventors: Bilac; Mario (Lawrenceville, GA), Dollar, II; Charles Randall (Norcross, GA)

Assignee:

International Classification:

Expiration Date: 10/02/2013