Abstract: An active inrush current limiter and method of limiting inrush current actively monitor line voltage and voltage drop across a current limiting resistance in a manner that eliminates the impact of fluctuations of line voltage on the decision of when to close a relay and bypass a current limiting resistance between the AC source and a group of power supplies. The active inrush current limiter includes a microcontroller connected to control the electronic switch and relay. The microcontroller is configured to sample the source AC power and detect a pattern of current flow through the electronic switch and current limiting resistance. A program executed in the microcontroller includes calculations that determine when to close the relay and bypass the current limiting resistance by detecting changes in power flow through the current limiting resistance that reliably correspond to a time when the capacitors in the power supplies have completed charging.

Abstract: An active inrush current limiter and method of limiting inrush current actively monitor line voltage and voltage drop across a current limiting resistance in a manner that eliminates the impact of fluctuations of line voltage on the decision of when to close a relay and bypass a current limiting resistance between the AC source and a group of power supplies. The active inrush current limiter includes a microcontroller connected to control the electronic switch and relay. The microcontroller is configured to sample the source AC power and detect a pattern of current flow through the electronic switch and current limiting resistance. A program executed in the microcontroller includes calculations that determine when to close the relay and bypass the current limiting resistance by detecting changes in power flow through the current limiting resistance that reliably correspond to a time when the capacitors in the power supplies have completed charging.

Abstract: Multilayer metallized polyolefin film structures having improved barrier properties and reduced water vapor transmission and oxygen transmission properties are provided. The film structures include a polyolefin substrate having a first and second side, a metal layer adjacent to the first side of the substrate and substantially coextensive therewith and a coating layer adjacent to the metal layer and substantially coextensive therewith. The coating layer includes a coating selected from the group consisting of polyvinylidene chloride, polyvinyl alcohol and acrylic coating.

Abstract: Multilayer metallized polyolefin film structures having improved barrier properties and reduced water vapor transmission and oxygen transmission properties are provided. The film structures include a polyolefin substrate having a first and second side, a metal layer adjacent to the first side of the substrate and substantially coextensive therewith and a coating layer adjacent to the metal layer and substantially coextensive therewith. The coating layer includes a coating selected from the group consisting of polyvinylidene chloride, polyvinyl alcohol and acrylic coating.