Hot Swap Redundant
2005
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ETASIS EFRP-300 Hot-Swap Redundant Power Supply $25.99 |
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0950-3471 HP Hot-Swap Power Supply (Redundant/Autoswitc $9.00 |
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22911700 Artesyn Hot-Swap Power Supply (Redundant/Autos $22.00 |
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Dell 500 Watt Redundant Hot Swap Power Supply DPS-500CB $10.00 |
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HP 5183-3519 Hot Swap Redundant V class Power Supply $99.00 |
More Hot Swap Redundant Results At The Bottom Of The Page
Made to measure protection avoids loss of revenue
A tailored and integrated approach to power protection, comprising modular UPS and fully-matched standby generators, is helping businesses sustain vital uptime and availability, explains Alan Luscombe of Uninterruptible Power Supplies Ltd (UPSL).
Changes in the business landscape, the growing risk of nationwide power cuts, and advances in technology are accelerating the uptake of more flexible and efficient UPS systems.
With global 24/7 online trading and customer expectations of immediate, anytime availability, power continuity around-the-clock is often essential: in highly competitive markets even a minor interruption to business systems can cause considerable revenue losses.
Whether due to planned maintenance or unplanned power outages, system downtime is undesirable – and increasingly unacceptable for business critical loads. The UK’s ageing power stations and unproven alternatives are a major cause for concern and should spur organisations to urgently review and reinforce their power protection systems, to ensure they can cope with unreliable supply, more frequent interruptions, and the possibility of long term power cuts.
Design for uptime
Transformerless three-phase UPS technology, introduced in the early 1990s and now widely adopted, delivered significant weight and space savings and enabled the development of rack-mounted modular UPS systems. Compared with traditional free-standing units, these units can reduced the required floor space by 75%, and vertically scalable modules mean that additional capacity for redundancy or load upgrades can be easily achieved at a fraction of the cost of adding an additional stand-alone unit.
Going back just a decade, only 10% of three-phase UPSs were parallel redundant systems but today this configuration accounts for more than 70% of installations. The majority of organisations needing protection for critical loads are upgrading to parallel redundancy, providing a minimum of one UPS over and above that required for capacity and ensuring continuous support of the load if any one UPS shuts down.
When specifying a UPS system, it can be difficult to predict what the power requirement is going to be so installations are often over-sized to provide contingency, creating a wasteful gap between installed capacity and the size of the actual critical load. While this may ensure sufficient UPS capacity, it means inefficient operation, additional expense and inefficient use of energy and costly floor space.
However, rack-mounted modular UPS configurations can be cost-effectively ‘right-sized’ from outset more easily by inserting or removing ‘hot-swappable’ modules, enabling power to be added as requirements grow without downtime or increasing footprint. Hot-swap technology, along with significant reductions in repair time, can also achieve six nines availability (99.9999%) – highly desirable in the pursuit of zero downtime.
Modularity improves efficiency by working closer to the load capacity than traditional UPSs but without sacrificing the security of the system. The more a load approaches the capacity of any UPS, the more efficiently the UPS operates. A traditional stand-alone parallel redundant system is typically just 50% loaded while a modular solution typically achieves a 70% or higher loading. This reduces energy use, Co2 emissions and UPS cooling requirements.
Cost benefits
The scalability of modular systems contributes major savings. Compare a single stand-alone non-redundant 100kVA UPS solution with a parallel redundant 3 x 50kVA UPS modular solution. While the latter may carry a price premium, the cost-benefit is quickly apparent. The modular configuration provides redundancy if one of the units fails, and modules can be added to accommodate an increase in capacity, in affordable, incremental steps without interruption to the critical load. The stand-alone system provides no redundancy and the addition of a second parallel 100kVA unit to increase capacity would be more costly, take up twice the space, and would also incur downtime during installation.
Price sensitivity is understandable, especially in the current market where expenditure on capital equipment may be subject to tougher scrutiny. However, while the purchase price of a traditional standalone UPS system can be typically 10% to 15% less than an advanced modular UPS system, Total Cost of Ownership should be considered. The lower purchase price of traditional standalone UPS technology must be offset against significantly higher operating expenses in comparison with a modular system based on technology which reduces energy loss costs. In fact the higher initial price of the modular system can be recovered within the first year of operation, and a comparison of additional long-term costs also favours modular technology.
For example, approximately £150,000 could be saved over five years by replacing a ten year old 400kVA parallel redundant UPS system, running at half of its rated capacity, with a new Decentralised Parallel Architecture (DPA) 200kVA parallel redundant UPS system. This would also reduce CO2 emissions by over 700 tonnes and cut floor space by 70 percent.
Upgrading a traditional UPS demands extra space, costly cabling and potentially involves taking the UPS system off-line during the upgrade. With a modular UPS, the upgrade is performed by simply inserting the additional power modules into the rack, without any interruption to the load, without increasing the footprint, and with no additional work on site. This flexibility makes upgrading a system very easy, and with little additional cost.
Standby power
There may be situations where organisations can tolerate occasional downtime, and in this case a UPS fitted with a standard or extended autonomy battery may provide the required system integrity. However, where downtime is untenable, a standby generator with automatic mains failure (AMF) detection and changeover facilities will be a vital part of the protected power supply system.
During a mains supply failure, the UPS battery will support the load for the time it takes the generator to start, stabilise and be switched over to supply the UPS. Assuming the generator has been correctly sized for the application, the UPS will accept the generator as a ‘mains replacement’, start to recharge the battery and continue to supply the critical load for the duration of the interruption.
Round-the-clock dependence on uninterrupted critical loads means that this seamless interaction between UPS and standby generators is an important requirement. Turnkey supply and installation also delivers valuable integration benefits, ensuring fully matched UPS and generator systems, removing the problem of demarcation between different suppliers and eliminating potential points of failure. Individually sourced units can compromise system autonomy and presents a risk of mis-sizing, causing installation and commissioning problems. A packaged solution with fully matched UPS and standby generator ensures a true ‘no-break’ supply in the event of a mains failure – protecting critical loads and assuring uptime.
About the Author
Alan Luscombe is the sales and marketing director for Uninterruptible Power Supplies Limited. He has over 20 years experience in power technology and is the co author of ‘The UPS handbook’, the definitive guide to the UPS industry. The book is now in its third edition and has sold over 30,000 copies worldwide
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ETASIS EFRP-300 Hot-Swap Redundant Power Supply $25.99 |
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0950-3471 HP Hot-Swap Power Supply (Redundant/Autoswitc $9.00 |
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22911700 Artesyn Hot-Swap Power Supply (Redundant/Autos $22.00 |
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Dell 500 Watt Redundant Hot Swap Power Supply DPS-500CB $10.00 |
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HP 5183-3519 Hot Swap Redundant V class Power Supply $99.00 |
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Dual Mini Redundant Hot-Swap Power Supply 2U Rackmount $44.99 |
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26K5097 IBM 26K5097 625 Watt Redundant Hot Swap $170.00 |
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HP REDUNDANT HOT SWAP POWER SUPPLY RH1492Y $225.00 |
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Adjile Systems Hot Swap Redundant Power Supply HC 33/23 $205.00 |
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ETASIS EFRP-300 Hot-Swap Redundant Power Supply $25.99 |
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HP 0950-4173 HOT SWAP REDUNDANT POWER SUPPLY 1EA $130.00 |
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HP 349W Redundant Hot-Swap Power Supply New DPS-349AB $39.99 |
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HP xSeries 350W Hot Swap Redundant Power Supply 59P4057 $39.99 |
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IBM 250W Hot Swap Redundant Power Supply New 00N7676 $35.00 |
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HP 349w Redundant Hot Swap Power Supply NEW 0950-3494 $55.00 |
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IBM 175W Hot-Swap Redundant Power Supply NEW 36L8845 $35.00 |
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HP 349W Redundant Hot-Swap Power Supply New DPS-349AB $55.00 |
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Nortel BCM Redundant Power Supply Module – Hot Swap $95.00 |
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Nortel BCM Redundant Power Supply Module – Hot Swap $95.00 |
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Nortel BCM Redundant Power Supply Module – Hot Swap $95.00 |
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Nortel BCM Redundant Power Supply Module – Hot Swap $95.00 |
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ETASIS EFRP-300 Hot-Swap Redundant Power Supply $36.21 |
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BPS-250RD 230W 1+1 PS/2 Size Hot-Swap Redundant Power $265.00 |
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Antec RPT-600 300W Redundant Power Supply Hot Swap $48.95 |
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450 Watt Hot-Swap Redundant Power Supply SH-450MRD-P $299.99 |
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A5527-69001 HP Hot-Swap Power Supply (Redundant/Autoswi $18.00 |
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Intel Corp. AXX750WPSCR 750W Hot-Swap Cold Redundant $223.00 |
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Ibm 33L3760 250w Hot-swap Redundant Power Supply (fru 3 $29.08 |
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ETASIS EFRP-300 Hot-Swap Redundant Power Supply $34.99 |
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IBM 49P2038 Power Supply, 560W Max Hot Swap Redundant $19.99 |
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IBM 02R2015 POWER SUPPLY 660W HOT SWAP REDUNDANT UPGRAD $135.92 |
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R2G-6350P Zippy Emacs 2U 350W 1+1 Hot-Swap Redundant EP $199.99 |
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IBM (7703) 950W AC Power Supply Hot-Swap Base Redundant $599.95 |
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Intel Corp. FSR2600LXFAN LX hot swap redundant fan kit $66.00 |
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NEW EMACS 2U 500W 1+1 Hot-Swap Redundant EPS-12V DC P/S $560.00 |
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IBM (6275) 250W AC REDUNDANT POWER SUPPLY HOT-SWAP h/s $49.95 |
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TOP-300SSA 300W Redundant Hot-Swap Power Supply RPS 2U $44.99 |
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IBM (24R2706) X SERIES 365 900W REDUNDANT HOT SWAP PS $35.00 |
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IBM (24R2723) X3950 1300W REDUNDANT HOT SWAP POWER SUP $75.00 |
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Hot Swap 300W Power Supply Back Up for Redundant Server $19.95 |
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Intel LX hot swap redundant fan kit FSR2600LXFAN $64.70 |
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Emacs hot swap dual redundant power supply $75.00 |
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IBM 40K1905 835W Hot-Swap Redundant Power for x3650 $100.00 |
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IBM 00N7676 250W Hot Swap Redundant Power Supply $495.00 |
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BPS 250DR2 Hot Swap Redundant Power Supply BPS-250DR2 $995.00 |
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INTEL, AXX750WPSCR 750W Hot-Swap Cold Redundant $231.60 |
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IBM 02R2015 POWER SUPPLY 660W HOT SWAP REDUNDANT UPGRAD $155.25 |
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36L8819 IBM Corporation 250WATT HOT/SWAP REDUNDANT POWE $10.00 |
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Redundant Hot-Swap Power Supply 300W PSMO-APH-300-X3 $19.99 |
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1300W HOT-SWAP REDUNDANT POWER SUPPLY 24R2715 $25.00 |
RAID Redundant Array Independent Drives
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