Series Power Supply
 |
US $100.00
Uninterruptible Power Supplies Design and Topology
With energy consumption going up and businesses increasingly reliant on electricity to run today’s operations, it is more important than ever that Uninterruptible Power Supply (UPS) topologies and designs are appropriately matched up to applications to secure the highest levels of power protection and business continuity.
An uninterruptible power supply sits between a critical load and its source of ac power, usually a mains supply. It provides two functions: a secure source of power for when the mains supply fails and a clean, stable and regulated supply when mains power is present.
It is this second, lesser known, of the two functions that is becoming increasingly important for today’s businesses, particularly those that rely heavily on computer and telecommunications technology. This type of equipment is more sensitive to fluctuating currents and voltages and other power problems (surges, sags, brownouts, transients and harmonics), which are typically associated with raw mains energy. Disturbances like this can cause costly breakdown of equipment and data loss or corruption.
There three primary types of static UPS are: Online, Offline and Line Interactive, which all differ in their ability to perform these critical functions and vary in the degree of security and level of power protection they provide.
Line Interactive and Offline UPS are limited in their design to smaller applications such as home and small office. By comparison, Online UPS provide superior electrical performance, reliability and resilience and are suitable for powering loads ranging from critical file servers and telcoms PBXs to entire industrial manufacturing sites and data centres.
UPS Design. Inverters. All uninterruptible power supplies incorporate an inverter, which digitally creates an ac waveform from a dc supply to power the connected load.
In Online UPS, the inverter is designed for continuous operation. Raw mains power is a true sinewave so this type of inverter’s output waveform is also a sinewave. This type of UPS is classified as Voltage and Frequency Independent (VFI). Its inverter operation is unaffected by changes in voltage or frequency supplied by mains power.
Line Interactive or Offline UPS contain inverters that are much less sophisticated and are only used in standby mode, ready to supply the load when mains power fails or fluctuates outside of its pre-set input voltage and frequency window. The least sophisticated inverter type is that which is used in a purely Offline UPS (the type used in home office applications).
The size of its inverter limits the UPS’s load capacity and is measured in terms of VA (inverter output voltage x Amps).
Rectifiers. The constantly running inverter of an Online uninterruptible power supply requires a continuous source of dc and this is supplied by a rectifier connected to mains power.
Rectifiers can generate a high level of harmonics, depending upon their design, method of operation and type of UPS. In addition to supplying the inverter, in a transformer-based Online UPS design, the rectifier also charges the battery set. In a transformerless design, a booster-converter sits between the rectifier and inverter to increase the dc voltage from the rectifier (or battery set) to the higher dc voltage level required by the inverter. The output of the booster-converter also charges the battery set.
In Line Interactive or Offline UPS, the battery charger is connected to mains power.
Battery Sets. A UPS battery set is sized in Watts. It provides a dc supply, on mains power supply failure, to the inverter. The length of time an inverter runs on batteries is known as ‘battery runtime’, ‘autonomy’ or ‘back-up time’.
A battery set may comprise a single battery string (or multiples) connected in parallel. A string consists of one or more battery blocks connected in series. Battery runtime is measured in Ah (Ampere-hour) and is dependent upon the rating of the battery set and size of the attached load. The lower the load, the longer battery runtime will be.
Filters. UPS contain EMI/RFI (Electro-magnetic Interference and Radio Frequency Interference) filters to protect them (and their loads) from harmful, mains-borne spikes and electrically induced noise. They do this by suppressing or ‘clamping’ peak voltages to acceptable levels.
These filters vary in complexity and usage within the three static uninterruptible power supply topologies. The filters can also help prevent electrical pollution, which can be generated by the high-frequency electronics within the UPS itself, from disrupting upstream or downstream equipment.
Bypasses. The primary reason Online uninterruptible power supplies are the preferred choice to protect critical loads is that they incorporate an automatic bypass, which provides it with resilience in case of system failure. This is known as ‘safe failure to mains’ and means that, if system failure occurs, the bypass will transfer the load to an alternative power source (mains power or an alternative power path such as maintenance bypass or centralised static switches that operate within parallel UPS configurations). Once the fault condition is cleared, the bypass will automatically transfer the load back to inverter output.
UPS Topologies. An Online or Double Conversion UPS maintains voltage and frequency variations within prescribed limits so output is independent of supply fluctuation. As well as conditioning mains power to negate problems, this is the only UPS solution that provides break-free supply to the plant or datacenter during a power outage.
A Line Interactive UPS uses built-in passive electronic regulation devices to stabilize and regulate voltage fluctuations. When mains supply power is present, the output frequency of the UPS tracks the input of the mains. Line Interactive and On-Line UPS use tower or ‘rackmount’ case formats and sit next to their respective loads, typically in a datacenter or computer room.
An Off-Line or Passive Standby UPS is a compact device designed for desktops or wall mounting, which uses its own output to track voltage and frequency variations in the mains supply power.
Accessories. UPS accessories include external maintenance bypasses, which allow maintenance to be carried out without disruption to the load, parallel kits, utilised to achieve higher levels of operating resilience and battery extension packs, which provide a simplified and convenient way to boost extended runtime.
Depending primarily upon load size and type, application and criticality, a complete UPS solution may consist of one or more of the three main topologies. Online, for example, is considered the ultimate power protection solution, whereas Line Interactive is an intermediate option. Offline offers basic power protection and is well suited to small and confined applications such as small offices or home.
About the Author
Robin Koffler is the General Manager for Riello UPS Ltd the UK subsidiary of Riello UPS (RPS S.p.A) a leading European manufacturer of Uninterruptible Power Supplies and a co-author of The Power Protection Guide(ISBN 978-0-9554428-0-3)- available from Amazon.com
|
|
Nonin Universal Power Supply for Avant Series $126 Nonin Universal Power Supply for Avant Series: Does not include Power cord. |
|
|
ZS Series power supply $101.99 OCZ ZS Series - Power supply ( internal ) |
|
|
Sabine NEX-Power Power Supply for NEX Series $16.99 Sabine NEX-Power Power Supply for NEX Series |
|
|
Sabine Nex-Power Power Supply For Nex Series $16.99 Sabine NEX-Power Power Supply for NEX Series |
|
|
Power supply $49.99 Elo - Power supply - for Entuitive 3000 Series 1229L 1529L |
|
|
550W Modular Series - power supply $71.99 VisionTek 550W Modular Series - Power supply ( internal ) |
|
|
Cisco - Pwr-C45-4200Acv= - Cisco Catalyst 4500 Series Dual Input Ac Power Supply - 4200W - Ac Power Supply $1966.72 the Catalyst 4500 Series Dual Input Ac Power Supply Supports Data And Poe, Is Designed To Accept Either 100v Ac Circuits Or 200v Ac Circuits. The 4200w Supply Is The Largest Internal Ac Power Supply Available For The Catalyst 4500 Series Switch. Customer Planning Large Scale Poe Deployments Can Use The Dual Inputs In The 200v Ac Configuration. Customers Planning For The Future Can Deploy The 4200w Power Supply With A Single 100v Circuit. [PWRC454200ACV] UPC: 882658008566 UNSPC: 39121004 17.6L x 12.9W x 10.9H 25.9 LB 1.35 Cubes |
|
|
Ult-Ls350 - Ultra Lifetime Series 350W Atx12V & Eps12V Power Supply - 350W - Atx12V & Eps12V Power Supply $47.29 All New Ultra Lifetime Series 350w Atx12v & Eps12v Power Supply Offer a Lifetime Warranty, More Connectivity Choices Than The Typical Power Supply, And Have Built in Short Circuit Protection. It Supports All Intel And Amd Platforms, Sata Devices And Pci Express Graphics Cards. This Power Supply Also Come Standard With Short Circuit Protection, In-rush Current Protection And Thermal Overload Cutoff Protection. [LS350] UPC: 022769401041 UNSPC: 39121004 9.6L x 6.8W x 3.9H 3.45 LB |
|
|
Yamaha PW8 IM8 SERIES POWER SUPPLY $599.99 Yamaha PW8 IM8 SERIES POWER SUPPLY |
|
|
DigiTech PS0913B Power Supply for Vocalist/RP Series $13.71 DigiTech PS0913B Power Supply for Vocalist/RP Series |
|
|
Maxon AC210N 9 Series AC Power Supply $18.75 Maxon AC210N 9 Series AC Power Supply |
|
|
Cisco 3845 Series DC Power Supply PWR3845DC $706 Cisco 3845 Series DC Power Supply PWR3845DC |
|
|
Nortel POWER SUPPLY FOR 6800 SERIES NTB446AAE6 $19.57 Nortel POWER SUPPLY FOR 6800 SERIES NTB446AAE6 |
|
|
Cisco 7920 Series Power Supply CPPWR7920 $37 Cisco 7920 Series Power Supply CPPWR7920 |
|
|
Yamaha Pw8 Im8 Series Power Supply $599.99 Yamaha PW8 IM8 SERIES POWER SUPPLY |
|
|
Digitech Ps0913b Power Supply For Vocalist/Rp Series $13.71 DigiTech PS0913B Power Supply for Vocalist/RP Series |
|
|
Tz 100/200 Series Replacement Power Supply $22.99 TZ 100/200 SERIES REPLACEMENT POWER SUPPLY |
|
|
Ultlsp450 - Ultra Lifetime Series Pro 450W Atx12V & Eps12V Power Supply - Atx12V & Eps12V Power Supply $58.4 this Ultra Lifetime Series Pro 450w Atx12v & Eps12v Power Supply Provides The Ultimate Amount of Power And Performance. It's Sleek New Design Incorporates Ascetics With Functionality. This Design Comes With a 135mm Cooling Fan Which Reduces Heat by 20% And Noise by 15 Db. In Addition to The Reduction of Heat And Noise, The Power Supply Also Comes With Sleeved Finished Power Cables Which Provide Better Air Flow And Help Reduce Cable Clutter. Over All This New Power Supply is The Ultimate Upgrade or Addition to Any System. [ULTLSP450] UPC: 022769401157 UNSPC: 39121004 10.9L x 6.8W x 3.9H 4.4 LB |
|
|
Lsp550 - Ultra Lifetime Series Pro 550W Atx12V & Eps12V Power Supply - 550W - Atx12V & Eps12V Power Supply $69.21 The New Lifetime Series Pro 550w Atx12v & Eps12v Power Supply is The Latest Addition to Our Line-up of Professional Power Supplies. It Provides The Ultimate Amount of Power And Performance. Its Sleek New Design Incorporates Ascetics With Functionality. This Design Comes With a 135mm Cooling Fan Which Reduces Heat by 20% And Noise by 15 Db. In Addition to The Reduction of Heat And Noise, It Also Comes With Sleeved Finished Power Cables Which Provide Better Air Flow And Help Reduce Cable Clutter. Over All This New Power Supply is The Ultimate Upgrade or Addition to Any System. [LSP550] UPC: 022769401164 UNSPC: 39121004 4.75 LB |
|
|
Lsp750 - Ultra Lifetime Series Pro 750W Atx12V & Eps12V Power Supply - 750W - Atx12V & Eps12V Power Supply $98.22 The New Lifetime Series Pro 750w Atx12v & Eps12v Power Supply is The Latest Addition to Our Line-up of Professional Power Supplies. It Provides The Ultimate Amount of Power And Performance. Its Sleek New Design Incorporates Ascetics With Functionality. This Design Comes With a 135mm Cooling Fan Which Reduces Heat by 20% And Noise by 15 Db. In Addition to The Reduction of Heat And Noise, It Also Comes With Sleeved Finished Power Cables Which Provide Better Air Flow And Help Reduce Cable Clutter. Over All This New Power Supply is The Ultimate Upgrade or Addition to Any System. [LSP750] UPC: 022769401188 UNSPC: 39121004 5 LB |
|
|
Lsp650 - Ultra Lifetime Series Pro 650W Atx12V & Eps12V Power Supply - 650W - Atx12V & Eps12V Power Supply $87.49 The New Lifetime Series Pro 650w Atx12v & Eps12v Power Supply is The Latest Addition to Our Line-up of Professional Power Supplies. It Provides The Ultimate Amount of Power And Performance. Its Sleek New Design Incorporates Ascetics With Functionality. This Design Comes With a 135mm Cooling Fan Which Reduces Heat by 20% And Noise by 15 Db. In Addition to The Reduction of Heat And Noise, It Also Comes With Sleeved Finished Power Cables Which Provide Better Air Flow And Help Reduce Cable Clutter. Over All This New Power Supply is The Ultimate Upgrade or Addition to Any System. [LSP650] UPC: 022769401171 UNSPC: 39121004 5.2 LB |
|
|
14621 - Coolmax V-500 Atx12V Power Supply - 500W - Atx12V Power Supply $45.54 the V-500 Atx 12v V2.01 Power Supply Has Specially Selected Components & High Performance Heat Sink To Cool Down System. Serial Ata 150 Ready & Fully Support All Amd & Intel Series Demand. Cable-tube On Main Power Cables For Better Cable Routing And Neatness. Universal Connector Fits Most Of Branded Motherboard. Also The 120mm Silent Fan Design, For Long Life, Noiseless And Fastest Cooling Time. [L38907] UPC: 0895963146212 UNSPC: 39121004 8.4L x 7.6W x 4H 2.9 LB |
|
|
J9583A - Hp J9583A Rack Mount For Power Supply $122.24 the Rack Mounting Kit Supports The 1u, Full Width Switches in The Following Switch Series And The Power Supply: V1810 Series, E2510 Series, E2520 Series, E2610 Series, E2810 Series, E2910 Series, E3500 Series, And The E620 Power Supply.;this Universal Rack Mounting Kit is Design to Fit The Following Racks: HP 10k 10642, HP 10k 10842, Panduit Cn, Panduit Cs, Wright Line Vantage S2, Apc Netshelter 600mm, And Apc Netshelter 800mm. [9080235] UPC: 886111545797 UNSPC: 31162309 28.25L x 5W x 3H 4.9 LB |
|
|
J8169A#Aba - Hp J8169A Proprietary Power Supply $1112.44 the Procurve 610 External Power Supply Series Provides Electrical Power For Power Over Ethernet (poe) To Connect Poe Switches And Modules To Power Devices Such As Ip Phone And Wireless Lan Access Points That Comply With The Ieee-802.3af Poe Standard. 4 External Power Supply Ports. [E81002] UPC: 829160098197 UNSPC: 39121004 23L x 9W x 23H 28 LB |
|
|
14743 - Coolmax Cl-700B Atx12V Power Supply - 700W - Atx12V Power Supply $88.95 this Cl-700b Atx12v Power Supply Offers a 120mm Blue Led Cooling Fan For Your Gaming System With Automatic Fan Speed Settings, so You no Longer Have to Worry About High or Low Settings And if Your Fan is Spinning Too Slow or Too Fast. The Cl-700b Will Adjust Itself According to The Necessary Heat Dissipation Level. 700w Offer a 6+2 Pci-e Ready For Better Graphics Capabilities. Painted in Black, The Cl-series Works Great And Looks Great. [BX9069] UPC: 895963147431 UNSPC: 39121004 5.6L x 5.9W x 3.3H 5 LB |
|
|
Cisco - Pwr-C45-1300Acv= - Cisco Ac Power Supply - 1300W - Ac Power Supply $665.03 The Cisco Catalyst 4500 Series Offers A Variety Of Power Supplies And Accessories To Meet The Diverse Needs Of Enterprise And Service Provider Customers. All Of The Available Cisco Catalyst 4500 Series Power Supplies Can Be Used For Data-only Deployments, Which Typically Require Just A Few Hundred Watts. For Deployments That Dictate Support For Inline Power, Cisco Offers Several Options. [PWRC451300ACV] UPC: 746320735535 UNSPC: 39121004 17.5L x 12.5W x 10H 17 LB 1.68 Cubes |
|
|
Lazer Platinum Series LZP-1000 - power supply $242.99 Kingwin Lazer Platinum Series LZP-1000 - Power supply ( internal ) |
|
|
Professional Series Gold AX850 - power supply $208.99 Corsair Professional Series Gold AX850 - Power supply ( internal ) |
|
|
Zm600Hp - Zalman 600W Atx12V & Eps12V Power Supply - 600W - Atx12V & Eps12V Power Supply $151.81 the 600w Atx12v & Eps12v Power Supply Supports The Latest Dual-core Cpus(intel Core2 Series/amd Athlon64-x2 Series), as Well as The Latest Dual Graphic Card Systems(sli). Four +12vdc Rails Supply Power Independently to The Cpu, Vga, Motherboard, And Peripheral Components For The Highest Level of Stability And Performance. Gold-plated The Terminals Minimize Power Loss by Reducing Contact Resistance. Blue Leds Are Installed Inside The Power Supply For Cool Aesthetics. [ZM600HP] UPC: 823884006001 UNSPC: 39121004 6.3 LB |
|
|
W0070Ruc - Thermaltake Tr2 430W Ac Power Supply - 430W - Atx Power Supply $53.62 tr2 Series is Designed With Mainstream PC in Mind. With Thermaltake's State-of-the-art Circuitry Design Capability And Advanced Packaging Technology, it is Capable of Providing The Same Level of High Efficiency And Power Protection That You Have Come to Expect From Thermaltake's Full Range of Power Supply. Tr2 Series Power Supply All Carries an Industry-leading 5 Year Limited Warranty For The Ultimate Piece of Mind. [W0070RUC] UPC: 841163006443 UNSPC: 39121004 10.8L x 4.2W x 7.8H 4.7 LB |
|
|
Pr30 - Tripp Lite Dc Power Supply - Dc Power Supply $150.5 precision Regulated DC Power Supplies Are Ideal For Commercial/land-mobile, Ham And CB Radios, Test Bench Supplies, Base Stations, Tape Players And Amplifiers. Designed For Years of Reliable Service And Superior Performance, They Efficiently Convert 120 Volts AC Into 13.8 Volts DC (+/-0.5v). The Trim Line Series of DC Power Supplies Offers a Low-profile Design With a Footprint That Matches The Most Popular Radios on The Market, Such as Motorola, Radius, GE Monogram Series And EF Johnson Models. [304016] UPC: 037332060174 UNSPC: 39121004 14L x 7.2W x 7.1H 20.85 LB 0.41 Cubes |
|
|
Oczz1000M - Ocz Technology Z 1000W Atx12V & Eps12V Power Supply - Atx12V & Eps12V Power Supply $237.15 the Ocz Technology Has Designed And Developed The Z Series Power Supply For Power Users Searching For Nothing But The Best. This Z Series Psu Feature Ultra-high Efficiency of 90% And Have Achieved The 80+ Gold Certification. This Z Series Raises The Bar in Power Management And Provides an Unparalleled Solution For Enthusiasts Who Won't Settle For Anything Less. [OCZZ1000M] UPC: 842024013853 UNSPC: 39121004 8.2 LB |
|
|
Cisco - Pwr-C45-2800Acv= - Cisco Catalyst 4500 Series Power Supply - 2800W $1310.01 The Cisco Catalyst 4500 Series Offers A Variety Of Power Supplies And Accessories To Meet The Diverse Needs Of Enterprise And Service Provider Customers. All Of The Available Cisco Catalyst 4500 Series Power Supplies Can Be Used For Data-only Deployments, Which Typically Require Just A Few Hundred Watts. For Deployments That Dictate Support For Inline Power, Cisco Offers Several Options. [PWRC452800ACV] UPC: 746320735528 UNSPC: 39121004 17.7L x 12.6W x 10H 18.15 LB |
|
|
3Com Switch 8800 Series Hot-swappable AC Power Supply - 1000W, 2000W - AC Power Supply 3C17507 $708.5 3Com Switch 8800 Series Hot-swappable AC Power Supply - 1000W, 2000W - AC Power Supply 3C17507 |
|
|
Is-1000Pd8 - Istarusa Atx12V & Eps12V Power Supply - 1000W - Atx12V & Eps12V Power Supply $303.46 the Istarusa 80 Plus Series Switching Power Supply Supports Latest Motherboard Connectors of 20, 24, 8, And 4 Pins. Standard Ps2 Form Factor Fits Most Atx or 4U Chassis. The 80 Plus Means That at Least 80 Percent Efficiency at 20, 50, And 100 Percent Loads, Which Saves Users on Electric Bills And Less Cooling Requirement. Istarusa 80 Plus Series is The Ideal Power Supply For High-end Workstation. [GE1326] UPC: 846813008648 UNSPC: 39121004 6.5L x 5W x 5H 12 LB |
|
|
WBN-Series IP-P300BN1-0 - power supply - 300 Watt $39.99 IN WIN BN-Series IP-P300BN1-0 - Power supply ( internal ) - SFX12V 3.01 - AC 115/230 V - 300 Watt |
|
|
Cisco AIRPWR5500AC= 5500 Series AC Power Supply $1660.67 Cisco 5500 Series Wireless Controller Redundant Power Supply. Form Factor: Plugin Module. Input Voltage Type: AC. |
|
|
Medfusion Power Supply $142.6 Medfusion Power Supply |