Arc-default detecting circuit breaker system

Details Arc-default detecting circuit breaker system Arc-default detecting circuit breaker system

2006-04-25

2006-04-25

Sircus, Brian (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

C361S043000

Reexamination Certificate

active

07035066

ABSTRACT:
An arc-fault detecting circuit-breaker system is operable with a protected electrical circuit that operates with direct current or alternating current. A normally closed line circuit breaker has an electrical input and an electrical output, and an electrical line connects the electrical output to the protected-element input. The system includes a detector of the rate of change with time of a current flow in the electrical line. An activating element alternating current voltage source has an alternating current output. A circuit-breaker activating element is operable responsive to the detector. The circuit-breaker activating element is electrically connected between the electrical line and the alternating current output. The circuit breaker activating element is a normally open switch that closes to establish a connection between the electrical line and the alternating current output in the event that the detector detects a rate of change of current with time in excess of a permitted maximum rate-of-change value.

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