Patent ID: 9136691
Filing Date: 2015-09-15
Classification: H02H,H03K

Abstract:
1. An electrical circuit for protection of a solid-state relay comprising: a switch element connected between an input signal source and a control input terminal of the solid-state relay; the solid-state relay comprising an output terminal for connection to a load; a sensing element associated with the solid-state relay to sense an operating parameter associated with the solid-state relay; a feedback element configured to control the switch element to switch an operating state in response to the operating parameter exceeding a reference parameter; wherein the feedback element is a comparator configured to compare a first value corresponding to a sensed operating parameter of the solid-state relay, and a second value corresponding to a predetermined maximum operating parameter of the solid-state relay; and a resistive feedback circuit connected to the feedback element, the resistive feedback circuit comprising: wherein a time interval between opening the switch element and closing the switch element is extended by the first resistor and the second resistor; and wherein the solid-state relay changes state in response to the switch element to control an output of the solid-state relay between an energized or de-energized state.