Automated AC line filter and surge suppression apparatus and...

Electricity: electrical systems and devices – Safety and protection of systems and devices – High voltage dissipation

Reexamination Certificate

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Reexamination Certificate

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06992873

ABSTRACT:
A automated AC line filter and surge suppression apparatus100having an inductive current sense loop (ICSL) circuit10for sensing inductive current at a load and controlling the application of AC line filter112to an AC power line to the load. Current sensor12in series with the input line senses inductive load current. A first bridge rectifier14rectifies the sensed load current to a proportionate DC voltage, which triggers a switch24. The output of switch24is fed into an opto-isolator26, which in turn controls second switch28. Switch28connects or disconnects AC line filter112from the system according to a predetermined sensed inductive current at the load. MOVs102and capacitive elements104provide continuous surge suppression protection to the load.

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