Patent ID: 8836282

Claim:
An electric charge cutoff device for delivering power to a terminal, comprising: a housing; a terminal adaptor connectable to the terminal; a cable for extending from the housing and connected to the terminal adaptor; a power connector plug connected to the housing and configured to receive power from a power source external to the housing; a sensor circuit positioned within the housing and for electrically coupling to the cable, and configured to detect a variation in a capacitance of the cable; a latched relay positioned within the housing and electrically coupled to the power connector plug and configured to electrically couple to the terminal adaptor, and configured to disable reception of power by the power connector plug from the power source in response to the sensor circuit detecting the variation in the capacitance of the cable; and a renewable energy source positioned within the housing and electrically coupled to the sensor circuit, and configured to provide power to the sensor circuit when reception of power by the power connector plug from the power source is disabled.