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The Smart-UPS is a series of enterprise-level uninterruptible power supplies (UPS) made by American Power Conversion (APC). [1] Most of the units have a SmartSlot (with the exception of SC and SMC series) which accepts an optional interface card providing features ranging from network connectivity to temperature and humidity monitoring. [ 2 ]
The three general categories of modern UPS systems are on-line, line-interactive and standby: [2] [3] [4] An online UPS uses a "double conversion" method of accepting AC input, rectifying to DC for passing through the rechargeable battery (or battery strings), then inverting back to 120 V/230 V AC for powering the protected equipment.
Buck–boost transformers can be used to power low voltage circuits including control, lighting circuits, or applications that require 12, 16, 24, 32 or 48 volts, consistent with the design's secondaries. The transformer is connected as an isolating transformer and the nameplate kVA rating is the transformer’s capacity. [2]
American gymnast Simone Biles has added another title to her resume. The 11-time Olympic medalist was named Thursday by Sports Illustrated as its 2024 Sportsperson of the Year. The Sportsperson of ...
A transformer supplying a three-wire distribution system has a single-phase input (primary) winding. The output (secondary) winding has a center tap connected to a grounded neutral. As shown in Fig. 1, either end to center has half the voltage of end-to-end.
The scope of “involuntary resettlement,” as the bank calls it, is vast. From 2004 to 2013, the bank’s projects physically or economically displaced an estimated 3.4 million people, forcing them from their homes, taking their land or damaging their livelihoods, ICIJ’s analysis of World Bank records reveals.
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