Systems, methods, and devices for controlling a serial arc...

Details Systems, methods, and devices for controlling a serial arc... Systems, methods, and devices for controlling a serial arc...

2011-01-18

2011-01-18

Nguyen, Danny (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

C361S044000

Reexamination Certificate

active

07872839

ABSTRACT:
Methods, systems, and devices for controlling a serial arc fault in an electrical circuit are disclosed. In some embodiments, the methods include the following: a. measuring a current in the circuit; b. determining whether the current is below a predetermined value; c. if the current is below ten percent of the predetermined value, determining whether a countdown timer value indicated by a cell pointer value is equal to zero; d. if the countdown timer value is equal to zero, starting a countdown timer, advancing the cell pointer value by one, and restarting the method at step a.; e. if the countdown timer value is not equal to zero, determining whether the interruptions in the current are periodic; f. if the interruptions in the current are not periodic, checking whether an arc event countdown timer is running; and g. if the arc event countdown timer is running, tripping a circuit breaker.

REFERENCES:
patent: 6137665 (2000-10-01), Boudaud
patent: 6927579 (2005-08-01), Blades
patent: 7227729 (2007-06-01), Parker et al.
patent: 7408750 (2008-08-01), Pellon et al.
patent: 2007/0133134 (2007-06-01), Kilroy et al.
patent: 2008/0158744 (2008-07-01), Rivers et al.

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