Ground fault circuit interrupter

A wireless power transmitter, comprising:

• a power source;
• a source resonator;
• an electrically conductive power circuit coupled between said power source and said source resonator;
• and
• a GFCI device, including
• a sense coil configured to determine a current flow in said power circuit,
• a switching device coupled to said power circuit and configured to disconnect said power source from said source resonator,
• a controller in communication with the sense coil and the switching device and configured to control the switching device based on the current flow in said power circuit, and
• an electrical power supply coupled to the switching device, wherein the power supply is electrically separate and electrically isolated from said power circuit.

A wireless power receiver, comprising:

• a capture resonator;
• an electrical storage device;
• an electrically conductive power circuit coupled between said capture resonator and said storage device;
• and
• a GFCI device, including
• a sense coil configured to determine a current flow in said power circuit,
• a switching device coupled to said power circuit and configured to disconnect said capture resonator from said storage device,
• a controller in communication with the sense coil and the switching device and configured to control the switching device based on the current flow in said power circuit, and
• an electrical power supply coupled to the switching device, wherein the power supply is electrically separate and electrically isolated from said power circuit.