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 TitleDate AddedCompany
whitepaper Which UPS is right for the job?2009-09-28 Eaton
  Traditionally, data center managers and facilities managers could choose from three UPS topologies: standby, line-interactive and double-conversion—offering widely varying levels of efficiency, performance and protection.

The latest generation of double-conversion UPSs offers unique multi-mode capabilities. The UPS operates in a very high-efficiency mode unless power conditions warrant a switch to the higher protective level typical of double-conversion mode.

This white paper describes how various UPS topologies work and looks at the impact of operating mode on five key factors of UPS performance: • Maintaining voltage within tolerances • Transferring among modes without locking up IT equipment • Transitioning gracefully to and from generator power • Reliability and availability • Energy efficiency

Tags: IT Infrastructure, Office Equipment, Data Infrastructure, IT Budgeting		   
whitepaper Battery Technology for Data Centers and Network Rooms: VRLA Reliability and Safety2009-04-08 American Power Conversion (APC)
  The Valve Regulated lead-Acid (VRLA) battery is the predominant choice for small and medium-sized Uninterruptible Power Supply (UPS) energy storage. This white paper explores how the technology affects overall battery life and system reliability. It will examine the expected performance, life cycle factors, and failure mechanisms of VRLA batteries.

Tags: Data Infrastructure, Components, IT Infrastructure		   
whitepaper Reliability Analysis of the APC Symmetra MW Power System2009-04-08 American Power Conversion (APC)
  This paper is a quantitaive reliability analysis of the APC Symmetra MW UPS performed by MTechnology, Inc. (MTech). In contrast to common MTBF calculations based on summing component failure rates, this study used techniques of Probabilistic Risk Assessment (PRA) to calculate the likelihood of over 680,000 potential failure modes. The mathematical method accounts for uncertainty in failure rates and component performance, and provides detailed guidance as to the contribution of each system component to the overall risk of failure.

Tags: IT Infrastructure, Office Equipment, IT Budgeting, Data Infrastructure		   
whitepaper Battery Technology for Data Centers and Network Rooms: Ventilation2009-04-08 American Power Conversion (APC)
  Lead-acid batteries are the most widely used method of energy reserve. Ventilation systems must address health and safety as well as performance of the battery and other equipment in a room. Valve Regulated Lead Acid (VRLA) batteries and modular battery cartridges (MBC) do not require special battery rooms and are suitable for use in an office environment. Air changes designed for human occupancy normally exceed the requirements for VRLA and MBC ventilation. Vented (flooded) batteries, which release hydrogen gas continuously, require a dedicated battery room with ventilation separate from the rest of the building. This paper summarizes some of the factors and codes to consider when selecting and sizing a ventilation system for a facility in which stationary batteries are installed.

Tags: Office Equipment, Components, Data Infrastructure		   
whitepaper 500% Improvement in Data Processing!2008-12-01 NEC Corporation of America
  Revenue Management Solutions (RMS) has one of the largest Microsoft® SQL database in the world - totaling over 50 billion records. Read how consolidating on NEC's Itanium Servers helped RMS achieve 500% performance gain in data processing and reduced report wait time from months to days.

Tags: Office Equipment, Wholesale - Retail, Data Infrastructure, Enterprise Planning		   
whitepaper Leading Consulting Engineers Discuss Power Factor, Real Power, and UPS Overload2006-03-16 American Power Conversion (APC)
  Read this paper for documentation of expert opinions from leading consulting engineers regarding various power trends that are occurring in the IT industry.

Tags: Office Equipment, Business Functions, IT Infrastructure		   
whitepaper Leading Consulting Engineers Discuss Power Factor, Real Power, and UPS Overload2008-11-04 Dell EqualLogic
  The purpose of this paper is to document expert opinions from leading consulting engineers regarding various power trends that are occurring in the IT industry.

Tags: Office Equipment, Business Functions, IT Infrastructure		   
whitepaper Power and Cooling Capacity Management for Data Centers2007-11-21 American Power Conversion (APC)
  High density IT equipment stresses the power density capability of modern data centers. The ability to measure and predict power and cooling capability at the rack enclosure level is required to ensure predictable performance and optimize use of the physical infrastructure resource. This paper describes the principles for achieving power and cooling capacity management.

Tags: IT Budgeting, IT Budgeting, IT Infrastructure, Office Equipment		   
whitepaper Preventive Maintenance Strategy for Data Centers2007-11-21 American Power Conversion (APC)
  In the broadening data center cost-saving and energy efficiency discussion, data center physical infrastructure preventive maintenance (PM) is sometimes neglected as an important tool for controlling TCO and downtime. PM is performed specifically to prevent faults from occurring. IT and facilities managers can improve systems uptime through a better understanding of PM best practices. This white paper describes the types of PM services that can help safeguard the uptime of data centers and IT equipment rooms. Various PM methodologies and approaches are discussed. Recommended practices are suggested.

Tags: Office Equipment, Data Infrastructure, IT Budgeting, IT Budgeting		   
whitepaper A Quantitative Comparison of High Efficiency AC vs. DC Power Distribution for Data Centers2007-11-04 American Power Conversion (APC)
  This paper presents a detailed quantitative efficiency comparison between the most efficient DC and AC power distribution methods, including an analysis of the effects of power distribution efficiency on the cooling power requirement and on total electrical consumption. The latest high efficiency AC and DC power distribution architectures are shown to have virtually the same efficiency, suggesting that a move to a DC-based architecture is unwarranted on the basis of efficiency.

Tags: Office Equipment, Data Infrastructure, IT Budgeting