Importance

Loading Importance Indicators...

Abstract

An apparatus and method for the avoidance of electrical shock in an electrical appliance. Preferred for a two wire appliance, the device consists of a current interrupting circuit that impedes current flow for short time intervals in each half cycle. If a fault to ground occurs during these short time intervals, an increased current flow through the plug is detected and this is recognized as a fault, causing a circuit interrupter to open and removing current from the load during the remainder of the half cycle. When the fault is removed, that event is detected within one half cycle and power is restored to the load. The apparatus can provide thermal control in the plug. The apparatus enables the use of a low current, low voltage switch to control high voltages and high currents in the appliance. The apparatus can transmit fault status information or other information to a remotely located controller and can receive control signals from that remotely located controller.

Loading the Abstract Image...

First Claim