Abstract: A method for high-reliability power switching may comprise: (a) transferring possession of a token to first control logic controlling a first triode for alternating current (TRIAC), the TRIAC operably coupled to a first power source; (b) applying a voltage to a gate of the first TRIAC according to the possession of the token; (c) detecting a violation of a power source parameter; (d) transferring possession of the token to second control logic controlling a second TRIAC, the second TRIAC operably coupled to a second power source; (e) removing the voltage from the gate of the first TRIAC; and (f) applying a voltage to a gate of the second TRIAC.

Abstract: The present invention is a subtractive current measuring system for a power receptacle. The system may comprise one or more of the following features: (a) a power receptacle; (b) a current carrying input wire; (c) a current carrying output wire; (d) a current transformer; (e) an electrical measuring device; and (f) interconnecting circuitry linking the current transformer and the electrical measuring device.

Abstract: A power and environmental monitoring system includes a power distribution unit, a power monitoring system including an internal sensor for monitoring power consumption characteristics of power supplied to equipment coupled with the power distribution unit, an environmental monitoring system including an internal sensor for monitoring environmental characteristics in a physical environment occupied by the power and environmental monitoring system, and a network connection. The power monitoring system and the environmental monitoring system share a common interface accessible via the network connection. The power distribution unit includes an I/O port for connecting an external sensor, and the environmental monitoring system is configured for receiving environmental characteristics sensed by the external sensor. The common interface comprises a series of Web pages for displaying characteristics sensed by the power monitoring system and the environmental monitoring system.