Abstract: The present invention relates to the field of transferring information over the power line to and/or from the device or devices powered by said power line. Devices that may be powered by either alternating current (AC) or direct current (DC) their operation may be controlled by which type of power they are receiving, AC, +DC or ?DC. Data may also transmitted by alternating the polarity of each half cycle of the power line, on a one half by one half cycle basis, in a controlled manner such that the powered device may receive such data to control its mode of operation. A method of reducing the heat in the switching devices and a system of encoding the data such that each powered device may have a different address and therefore may return data when requested is also disclosed.

Abstract: The present invention relates to the field of transferring information over the power line to and/or from the device or devices powered by said power line. For devices that may be powered by either alternating current (AC) or direct current (DC) their operation may be controlled by which type of power they are receiving, AC, +DC or ?DC. Data may also transmitted by alternating the polarity of each half cycle of the power line, on a one half by one half cycle basis, in a controlled manner such that the powered device may receive such data to control its mode of operation. A method of reducing the heat in the switching devices and a system of encoding the data such that each powered device may have a different address and therefore may return data when requested is also disclosed.

Abstract: A device that may be inserted into a power cord or power distribution system prior to a computer, monitor or like devices for correcting the inherently bad power quality of such devices and for eliminating the losses and damage to and within the power distribution system. The device can also provide a unique low cost method of supplying uninterruptable power to said electronic equipment. This uninterruptable power supply (UPS) is continuously active and limits may be set to limit the peak demand drawn from said power distribution system to an amount slightly above the average power consumed by the electronic equipment to which it is connected. The demand may also be controlled in response to directions of an energy management system. The concepts disclosed may also be incorporated directly into the power supply of any electronic device to achieve high power quality and peak demand control.