Method and safety device for ground fault circuit

Details Method and safety device for ground fault circuit Method and safety device for ground fault circuit

2004-04-19

2009-12-22

Paladini, Albert W (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

C361S043000, C361S044000, C361S045000, C361S046000, C361S047000, C361S048000, C361S049000, C361S050000, C361S079000, C361S086000, C361S087000, C361S088000, C324S607000, C324S509000, C324S523000

Reexamination Certificate

active

07636224

ABSTRACT:
The invention refers to a method and an apparatus (1) for protecting people against leakage currents while using appliances such as home appliances or the like. The apparatus (1) is provided with a differential switch (20) normally open and a differential current transformer (39) which generates a signal proportional to the leakage current, an elaboration unit (50) interfaced with the latter acquires said signal and keeps the switch (20) closed until a dangerous condition is met, corresponding to an acquired signal having a magnitude greater than a limit value.

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patent: 2004/0212935 (2004-10-01), Pierce et al.
patent: 2 203 907 (1988-10-01), None

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