Hubbell Limited

David D Yu

John R Baldwin

Nelson Bonilla

Thomas James Batko

David F Ellison

A self testing fault detector having a line side and a load side and a conductive path there between, said apparatus is provided. The self testing fault detector includes a controller, adapted to perform periodic status tests on a protection circuit of the self testing fault detector without interrupting power to the load.

Self testing ground fault circuit interrupter (GFCI)

A multifunction user interface provided as an add-on option to a more basic multifunction sensor which does not provide a display or keypad, to provide a local user interface to access and control parameters of a control network. The basic multifunction sensor provides a plurality of parameter sensors in one sensor housing, and can interface with and control operation of one or more processor control systems connected by a network bus in an occupied space networked environment. The basic sensor comprises at least an occupancy sensor, a temperature sensor, and a common network communications and control processor coupled to a common communication transceiver. This allows the basic multifunction sensor to interface with and control operation of one or more processor control systems in an occupied space networked environment. The add-on multifunction user interface comprises a display controlled by a display controller and a keypad input controlled by a keypad controller, which are electrically coupled to the communications and- control processor to provide the local user interface.

System for physically mounting a multifunction user interface to a basic multifunction sensor to access and control various parameters of a control network environment

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Cresskill, NJ, United States of America

David D Yu