Patent application number | Description | Published |
20090212630 | Apparatus And Method For Powering Load Center Circuits With An Auxiliary Power Source - An electrical distribution system is designed to automatically connect a dedicated group of circuits, which are normally powered by a primary power source, to an auxiliary power source upon detection that there has been a disruption or failure in the primary power source. The system includes a switching arrangement that allows an operator to manually connect the auxiliary power source with other circuits that are not generally powered during disruption of the primary power source. The switching arrangement includes an interlinked switch or breaker arrangement that prevents any of the other circuits that are normally powered by the primary source from being automatically connected to the primary power source when primary power source is restored if those other circuits are connected to the auxiliary power source when the primary power source is restored. | 08-27-2009 |
20110100787 | Sequenced Separately-Derived Transfer Switch Capable Of Switching A Load Between A Pair Of Power Supplies Without Introducing Open Neutral Switching Transients - An interlock arrangement operatively associated with utility and generator side switches of an electrical panel including a first main switch associated with the first power supply and a second main switch associated with the second power supply. The interlock arrangement includes a first neutral switch associated with the first power supply, and a second neutral switch associated with the second power supply. A lockout sequencer arrangement has a first lockout that restricts simultaneous switching of the first and the second neutral switch, a second lockout configured to engage the first lockout to restrict movement of the first lockout when the first main switch is a conductive position, and a third lockout configured to engage the first lockout to restrict movement of the first lockout when the second main switch is in a conductive position. | 05-05-2011 |
20120267957 | Transfer Switch For Automatically Switching Between Alternative Energy Source And Utility Grid - An automatic transfer switch configured for connection to a non-traditional, full-time or intermittent power source, such as a wind turbine or solar panel, selectively connects the non-traditional power source as a primary power source and a utility-derived power source as a secondary power source. The intermittent power source includes an energy storage device, such as a bank of DC batteries, to supplement power delivery during periods of low energy production. The power is provided to an AC load via a DC-to-AC inverter. The transfer switch includes an input to monitor the voltage level on the energy storage device and will switch from the primary power source to the utility power source when the voltage level on the energy storage device drops below a preset level. Thus, a loading condition that exceeds the rating of the inverter will not fault the inverter or limit the power available to the loads. | 10-25-2012 |
20130220781 | Switch Assembly With Sequentially Actuated Power and Neutral Switching - A switch assembly and method of switching a load between a first power source and a second power source that maintains a desired sequencing of the making and breaking of both the neutral and power connections in response to a single user input. The switch assembly includes an actuator that is movable between a first position and a second position and a first movable element and a second movable element that are operably coupled to one another and the actuator. A positive switch contact arrangement is coupled with the first movable element and a neutral switch contact arrangement is coupled with the second movable element. The positive switch contact arrangement and the neutral switch contact arrangement comprise geometrically different constructions so that moving the actuator between the first position and the second position avoids an open neutral condition. | 08-29-2013 |
20130328677 | Home Monitoring/Security System With Dual Communication Options - A building monitoring system having dual communication options is disclosed. The controller is configured to communicate via a pair of communication networks, According to one embodiment of the invention, the controller is connected to a Public Switched Telephone Network (PSTN) and to a Global System for Mobile Communications (GSM) network. The controller further includes a gateway to selectively connect the PSTN to the GSM network. The controller may monitor the status of the PSTN line. If the PSTN line is operational, the gateway connects the PSTN jack from the telephone to the PSTN jack for the telephone line. If the PSTN line is not operational, the PSTN jack from the telephone is connected to a converter which is, in turn, connected to a cellular radio. The converter is configured to convert the analog signals for the PSTN to digital signals for transmission via the GSM network and vice versa. | 12-12-2013 |
20140001869 | Semiautomatic Transfer Switch With Open Neutral Protection | 01-02-2014 |
20140002940 | Open Neutral Protection | 01-02-2014 |
20140312695 | Switch-Type Interlock Arrangement For Controlling The Neutral Output Of A Portable Generator - An interlock arrangement allows a floating neutral electrical generator having a receptacle, such as a duplex receptacle, absent GFCI protection to be used to provide electrical power to the electrical system of a home or other building during utility power interruption. The interlock arrangement includes structure to disable or prevent access to the duplex receptacle when the electrical generator is coupled to the power cord used to transfer electrical power from the generator to the electrical system of the building. Thus, the duplex receptacles cannot be used to power electrical devices when the generator is connected to supply power to the electrical system of the building. Conversely, when the generator is physically disconnected from the electrical system of the building, the interlock arrangement exposes or supplies power to the duplex receptacles, and may be configured to close access to the receptacle used for connecting to a building electrical system. | 10-23-2014 |