Frequency dependent ground fault interrupt

An electrical wiring device, comprising:

• a plurality of line terminals comprising a line-side phase terminal and a line-side neutral terminal;
• a plurality of load terminals comprising a load-side phase terminal and a load-side neutral terminal;
• a line conductor electrically coupling the line-side phase terminal to the load-side phase terminal;
• a neutral conductor electrically coupling the line-side neutral terminal to the load-side neutral terminal;
• and
• a controller configured to trigger a trip mechanism to electrically decouple the at least one of the plurality of line terminals from at least one of the plurality of load terminals based, at least in part, on comparing a magnitude of a current differential between the line conductor and the neutral conductor to a threshold,
• a controller integrity detection circuit configured to trigger the trip mechanism if an input signal is not received from the controller within a predetermined period of time, wherein the controller is configured to perform at least one test prior to outputting the input signal to the controller integrity detection circuit, wherein the at least one test includes a test of at least one of a hardware, a firmware, or a software of the controller.

An electrical wiring device, comprising:

• a plurality of line terminals comprising a line-side phase terminal and a line-side neutral terminal;
• a plurality of load terminals comprising a load-side phase terminal and a load-side neutral terminal;
• a line conductor electrically coupling the line-side phase terminal to the load-side phase terminal;
• a neutral conductor electrically coupling the line-side neutral terminal to the load-side neutral terminal;
• and
• a third conductor;
• a differential transformer, wherein at least the neutral conductor and the third conductor extend through an inner diameter of the differential transformer;
• a function generator configured to provide a drive signal to the third conductor, wherein the drive signal creates a differential current in the third conductor with respect to the neutral conductor, wherein the differential transformer is configured to generate a voltage signal representative of the differential current;
• a protective circuit assembly coupled to the differential transformer, the protective circuit assembly being configured to trigger a trip mechanism to electrically decouple at least one of the plurality of line terminals from at least one of the plurality of load terminals when the voltage signal substantially corresponds to at least one predetermined fault criterion, wherein the drive signal is configured to create the differential current in a manner that matches at least one of the at least one predetermined fault criterion.