Patent ID: 7091871
Filing Date: 2006-08-15
Classification: G01R

Abstract:
1. An electrical hazard detection system, comprising: an activation circuit for establishing a reference connection to true earth ground; an amplifier including a reference terminal, an input terminal, and an output terminal; a first electrically conductive test-point electrically connected to the reference terminal of the amplifier; a biasing resistor placed between the reference terminal of the amplifier and the input terminal of the amplifier; a biasing resistive circuit placed between the input terminal of the amplifier and the activation circuit; a second electrically conductive test-point; an electrically sensitive indicating device placed between the second electrically conductive test-point and the output terminal of the amplifier; wherein, if a first electric potential with respect to true earth ground of the first electrically conductive test-point is applied to the activation circuit and a second electric potential is applied to the second electrically conductive test-point, the activation circuit conducts a first electric current to the first electrically conductive test-point creating a third electric potential at the input terminal of the amplifier with reference to the reference terminal of the amplifier that, in turn, activates the amplifier that, in turn, allows a second electric current to flow from the second electrically conductive test-point through the electrically sensitive indicating device, through the amplifier, and to the first electrically conductive test-point.