Arc fault detector apparatus, means and system

Details Arc fault detector apparatus, means and system Arc fault detector apparatus, means and system

1998-11-23

2000-02-29

Sherry, Michael J.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 45, 361 79, 361 86, H02H 300

Patent

active

060316993

ABSTRACT:
A sputtering arc fault detector (10) for a system having an electrical conductor (14) carrying current to a load. The sputtering arc fault detector includes a current monitor (64) coupled to the conductor for generating a variable signal responsive to behavior of the current in the conductor. A level detector (58) is coupled to the monitor and generates a first pulse when the variable signal exceeds a first level. A step detector (62) is coupled to the monitor and is responsive to rapid step increases of the variable signal. The step detector generates a second pulse when the variable signal exceeds a second level. An arc verifier (48), which is coupled to the level detector and the step detector, combines the first and second pulses, and generates a fault signal when the combined pulses exceed a third level.

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