Todays deals on Vdc Power?

Lambda LMS-3060 0-60VDC .5A Regulated Programable Power Supply $8,900.00

NEW ADS WILMORE1654 48 VDC VOLTAGE POWER SUPPLY TELCOM $1,999.00

RATELCO 48 VDC FC48754A recitifier charger POWER SUPPLY $1,499.00

RELIANCE ELECTRIC 57C493 LORAIN ES371AMB 376W DC POWER SUPPLY 5VDC TESTED!! $1,745.00

HP Agilent 6030A System Autoranging DC Power Supply, DC, 0 to 200 Vdc $1,750.00

1kxISKRA PR58B 12/24VAC 100/110VDC POWER RELAY DPDT 10A $1,500.00

HP Agilent 66000A 4 66104A 0-60VDC 0-2.5Amp DC Variable Power Supply Main Frame $1,499.99

OMRON NT620C-ST141-E Interactive Display 24vdc 20w OMRON S82K-05024 Power Supply $1,411.36

422PS2 B&B POWER SUPPLY QTY 100 FACT SEALED BOX 12VDC@100MA WALL TRANSFORMER $1,399.95

Mid Eastern Industries 98C417 Power Supply 480 VAC 60 Hz out 24-28 VDC 0-50A $1,200.00

CS-Fluid-Power Main Valve Solenoid ADS-50AF-N-G2-24VDC JIS 10K 50A SUS316 116338 $1,299.99

HP Agilent 6012B DC Power Supply, 0-60 Vdc, 0-50 A $1,250.00

Nemic Lambda EWS1500-12 EWS150012 Power Supply 12VDC 125A +S $1,179.00

Harris Instrument GPU Level 1 Power Supply 10VDC $1,250.00

Tucker Lambda LB726FM2603 Regulated Power Supply 300VDC 16ADC $999.95

Agilent HP 6653A DC Power supply 40Vdc @ 12.5A Opt. J04 $995.00

Agilent HP 6653A DC Power supply 35Vdc @ 15A (5 in stock with cal cert) $995.00

PD Precision Lab Power Supply 0.0001-20 VDC TESTED $999.00

HP J27-6269A DC Power Supply 0-40VDC ~ 50A, 230V input $995.96

MURR ELEKTRONIK MPS40-3X400-500/24 SWITCHING POWER SUPPLY 24VDC ART NO 85069 $999.00

Uticor Power Panel w/Frame & 24VDC Power Supply, Model# 100G-10T2R0 $1,000.00

SIEMENS SITOP 20 POWER SUPPLY 6EP1436-1SH01 24VDC 20 AMP *NEW* $980.00

NEW SCHROFF TPS 24 24VDC SWITCHPAC POWER SUPPLY TPS 24/4,11006-064 24VDC $895.00

GOULD PE-0100-000 REV A 24VDC POWER SUPPLY 100-240VAC $799.90

HONEYWELL / GE IC697PWR710H UNILOGIC POWER SUPPLY 5V@55W 120/240VAC 125VDC $795.00

Vicor MegaPac MP4-75539 MP475539 High Power Supply 300VDC $699.00

OFFER & WIN MODULAR POWER SUPPLY MIL MPS-DLX-5SY IN 18…36VDC $750.00

SORENSEN DCR 60-9BM50 DC POWER SUPPLY OUTPUT: 55VDC MAX. @ 9.4A MAX. TESTED!! $699.99

MURR MCS40 85099 3 PHASE SWITCH MODE POWER SUPPLY 40A 24VDC TESTED!!! $699.99

Lambda LFS-50-24 DC Power Supply Lambda LFS5024 3.06kW 74 Amp 24 VDC *Tested* $700.00

OMEGA COUTANT OMS1000 24 24 VDC 42 AMP POWER SUPPLY 1000 WATT Enclosure TEACAN $700.00

Lambda LFS-49-24 DC Power Supply Lambda LFS4924 2.26kW 72 Amp 24 VDC *Tested* $690.00

FLUKE 415B ±2500 VDC/30 mA HIGH VOLTAGE POWER SUPPLY! $650.00

Powertec 9N12-62-372-FG-34-S1746A 12VDC 62A Power Supp. $599.00

Nemic Lambda EWS1500-5 EWS15005 Power Supply 5VDC 300A $579.00

Sorensen DLM 60-10 0-60 Vdc 0-10 amp Power Supply $675.00

Agilent HP 6033A DC Power Supply 20Vdc 30Amps @200W $595.00

SOLA ELECTRIC 28-2127-1 CVDV POWER SUPPLY 24VDC 120 V 25AMP $599.99

KEPCO HSP 48-21 1000W DC POWER SUPPLY 33.6-60 VDC 21A $650.00

GE FANUC IC697PWR710K POWER SUPPLY 5V@55W 120/240VAC 125VDC IC697-PWR710K $650.00

Allen Bradley 2010 *NEW* 1606-XL960E-3 Power Supply 1606XL960E3 24VDC 40A Output $649.00

SIEMENS 6EP1436-2BA00 SITOP POWER 20 24VDC NEW $619.95

ACDC ELECTRONICS RT151-121 POWER SUPPLY 5/+-12VDC NNB!! $625.00

BK Precision 1744A 0-35 VDC 0-10A DC Power Supply $616.50

teleste Power supply 220VAC – 24VDC 4A (19″ rackmont) $515.00

NEW IN BOX ALLEN BRADLEY 1606-XLS480E SERIES A PERFORMANCE POWER SUPPLY 24-48VDC $599.99

Honeywell 14507287-003 Power Module 120VAC In 24VAC Cont. 24VAC&24VDC Accessory $595.00

ELCO VOLGEN 24VDC ESK80U-1212 POWER SUPPLY $595.00

NEW LAMBDA LIS-81-24 24VDC POWER SUPPLY $595.00

NEW SCHROFF TPS 24 24VDC SWITCHPAC POWER SUPPLY TPS 24/2 11006-060,OUTPUT:24VDC $595.00

SIEMENS 6EP1436-2BA00 SITOP POWER 20 24VDC NOB $589.95

HONEYWELL CCI LLC POWER SUPPLY 5/15/24 VDC MODEL 14506471 $579.99

Power One NHC3011-5 24VDC 125A 3U Power Supply Module 208-240VAC 50/60Hz $549.99

Mean Well USA Inc 600S-N048 Power Supply Type SCN-600-48 Output 48VDC 12.0A $568.00

ACOPIAN V24PT30 RACK POWER SUPPLY 24 VDC $560.00

HP 6645A System DC Power Supply 0-120VDC 0-1.5A output 220V Input 50/60Hz $499.00

LAMBDA JFS075024 20.0-20.9VDC OUTPUT POWER SUPPLY NNB $525.00

SOLA HEVI-DUTY SH15-Q7 28VDC POWER SUPPLY MODEL VS1-L6-00 (555-CE) 1500 WATT $500.00

Tamura Corp WES-24G-U Power Supply Output 24VDc 8A 28VDC 6A $525.00

DAYKIN MODEL PSD4862425-5E 24VDC POWER SUPPLY NNB $475.00

DC Power Supply 3 Phase 22VDC at 10 amp $500.00

Condor DCX-354-1205F DC-DC Converter Power Supply Quad 12V,5V Output 40-60VDC In $500.00

GE FANUC IC693PWR322F 24/48VDC 30W PLC POWER SUPPLY $510.00

HONEYWELL MICROENERGY POWER SUPPLY 5/15/24 VDC OUTPUT MODEL 14506471 $499.99

AUTOMAX, DISTRIBUTED POWER SYSTEM FIELD POWER MODULE, 230-460V, 15A, OUT-500VDC $499.00

2 INFINITY POWER SUPPLIES 24 VDC MODEL EMX150 $489.99

Siemens 6EP1933-2EC41 SITOP UPS 500S Power Supply USB-INTERFACE 2.5kW 24VDC 15A $490.92

NIB Schneider Electric Power Supply TSXSUP1101_TSXSUP11O1_85-132 VAC_24 VDC_10A $485.00

Omron Power Supply C500-PS212-E 3G2A5-PS212-E 24 VDC (5025) $469.00

Garreventa 24 VDC Power Supply FREE SHIPPING $481.00

Garreventa 24 VDC Power Supply FREE SHIPPING $481.00

QTY Wilmore DC-DC Converter Power Model 1385 1385(077) 48+8 VDC 13.0 VDC 15A $450.00

Omron S82F-2424P Switching Power Supply 24VDC 10A NEW IN BOX S82F2424P $371.30

Omron S82J-30024 Power Supply 24 VDC 14 AMP NEW IN BOX S82J30024 $371.30

45W Din Rail Mounted 24VDC 2A Output Power supply 20pcs $450.00

HP Agilent 6632A 20 VDC, 5 AMP, Power Supply $400.00

LAMBDA LE 101 FM (0-36 VDC, 0-5 AMPS) REGULATED DC POWER SUPPLY $399.99

TDK EAK24-6R0G EAK246R0G Power Supply 24VDC 6.3A $399.00

Siemens 30VDC Power Supply 3RX9303-OAAO $425.00

ULTRASONIC 48KHZ GEN POWER GENERATOR 48VDC 4.0302.007.0 ULTRA SPRAY (51) $419.00

Locknetics by Schlage POWER SUPPLY 515-24 24 VDC R=$700 $430.69

SIEMENS 6EW1380-4AB01 POWER SUPPLY 24VDC 10A TESTED!! $390.00

Chinfa DRA120-24FSA DRA12024FSA Power Supply 24VDC 120W $399.00

Lambda LT-823 Power Supply 0 – 36 VDC 0 – 80 Amp 208 3 phase $350.00

Allen Bradley AB Power Supply 1606-XL480E 24VDC 20A $425.00

Omron S8EI-02524D Power Supply Output 24VDc 1.1A $425.00

Astec Powertec Switcher 9N24-32-372-FG-3 Power Supply 080-25459-011 24V DC 24VDC $419.99

METRONIX METRONIX 452031 RF6-8 4.5-6.3VDC POWER SUPPLY $399.00

NEW LAMBDA SE-250-3 DC POWER SUPPLY 18.0-29.40VDC $399.99

OMRON S82F3024 POWER SUPPLY 24VDC 14A OUTPUT 100-240VAC $399.99

IFM Electronic Power Supply AC1207 AC 1207 24VDC (4803) $399.99

Omron Power Supply S8PS-15024C 24 vdc nib $399.99

NIB SOLA SDN30-24-480 POWER SUPPLY 24VDC 30AMP 500V 60HZ SDN3024480 $409.95

TOWER ELECTRONICS POWER SUPPLY 12 VDC MODEL 100-0320 $399.99

*NEW* Quint Phoenix Power Supply 120 240 AC 24 VDC 20A Volts DC Supplies PSU $399.00

S82G-1015 Omron New In Box Power Supply S82G1015 (7.2 A @ 15VDC) $399.99

Allen Bradley, 1606-XLSDNET8, Power Supply, 24 VDC, 8 AMP, New, In Box, NIB $399.95

MITSUBISHI FXON-8EX-ES/UL INPUT MODULE 24VDC FXON-8EX-ES POWER $395.00

DAYKIN MODEL PSD4862425-5E 24VDC POWER SUPPLY NEW $375.00

Power Supply 24 VDC $400.00

Vdc Power Questions

Dc Building Power: Economic Factors, Application Drivers, Architecture/technology, Standards And Regulatory Developments

The DC building power market is projected to grow significantly over the next several years, and among the driving forces is the need to improve efficiency and reduce electricity costs in several areas. According to the US Environmental Protection Agency (EPA), in 2006, data centers and servers in the United States accounted for approximately 1.5% of the nation’s total electricity consumption. To put this in perspective, the EPA stated that this total exceeded the electricity consumed by the entire nation’s color televisions, and is similar to the amount of electricity consumed by approximately 5.8 million average TV households. In addition, energy consumption in data centers in the US is projected to continue to grow, and double every five years.

Traditionally, large data centers and telecommunications facilities have consumed large amounts of electricity without much regard for energy efficiency. Due to the continuous need for energy production, it has been an acceptable practice to trade off energy efficiency and operating costs for the sake of system reliability. However, in recent years a number of factors have emerged that may change that practice. Now, a debate is taking place on how to cope with the growing need for electricity to power these facilities. Data center managers and other data center professionals are looking to dc power as an alternative solution to traditional ac power. Proponents of dc power claim that it has the potential to eliminate the biggest sources of energy loss and waste in traditional ac systems: the multiple back and forth transformations and conditioning needed to step voltage down for use by IT equipment.

One of the pressing needs for the further expansion of dc power was the establishment of dc voltage standards. In light of this need, two new dc power distribution standards for facilities were developed over the past year, one for high-voltage (380Vdc) applications and another for low-voltage (24Vdc) applications. The development of theses standards is significant and is expected to contribute to the further expansion of dc power. The 380Vdc standard was developed by the Electric Power Research Institute (EPRI) along with Lawrence Berkeley National Laboratories and is designed for data centers and other critical facilities. EPRI has developed the first dc voltage tolerance envelope plotting voltage variations versus time for 380-Vdc powered equipment. The new dc voltage tolerance envelope provides the technical details of the electrical operating environment, including allowable voltage surges and sags that could enable engineers to design power converters for use with 380-Vdc distribution systems for next-generation data center equipment.

The 24Vdc standard was developed by EMerge and is expected to play an important role in the expansion of dc power in commercial, industrial and residential buildings. The new EMerge Alliance standard is described as the first roadmap for the utilization of safe, low-voltage direct current power in commercial interiors. The EMerge Alliance Standard 1.0 establishes a more efficient means of powering the rapidly increasing number of digital, dc-powered devices, such as sensors, lighting and IT equipment found in today’s workplaces. It creates an integrated, open platform for power, interior infrastructures, controls and a wide variety of peripheral devices to facilitate the hybrid use of ac and dc power within buildings.

As the emergence of the EMerge Alliance standard suggests, dc power can be used to improve efficiency at the lower-voltage levels. The addition of dc power delivery systems to homes, office building and commercial facilities offers the potential for significant improvements in energy delivery efficiency, reliability, power quality and cost of operation. Most of these facilities are currently dominated by fixed overhead lighting, and a variety of electrical devices that are typically wired for the building’s lifetime rather than the occupant or residents evolving needs.  In fact, although opportunities exist in both new installations and retrofits, according to the EMerge Alliance, 80% of the market opportunities are in the updating and retrofitting of commercial buildings. Actually, the ability to distribute low-voltage dc power within common infrastructures is already present in most commercial interiors

Lighting presents one of the major opportunities for the further development of dc power. According to a recent study funded by the U.S. Department of Energys Energy Efficiency and Renewable Energy Office (DOE EERE), lighting accounts for 22% of all electricity consumed in the United States. Commercial businesses consume 20% to 30% of their total energy just for lighting. And, 50% or more of that lighting-related energy may be wasted by obsolete equipment, inadequate maintenance or inefficient use. Upgrading lighting systems is one of the best energy efficiency investments available to a commercial facility. Since linear fluorescent light accounts for the majority of a commercial building’s lighting energy use, improving the efficiency of these systems can save significant amounts of energy and money.

In addition to advances in dc power for data centers, new advances in solid-state lighting (SSL) are among the market forces expected to drive the dc power market over the next several years. The era SSL will be arriving soon, primarily powered by ultra-high-efficiency light emitting diodes (LEDs) and to a lesser extent by organic light emitting diodes (OLEDs). Used in large high-definition signs, architectural lighting, stadiums, billboards and other applications, modern LEDs represent the latest lighting devices based on dc power.  In fact, current economic conditions are just right for the emerging LED replacement market. Several factors cited for this include “dramatic” improvements in commercially available LED performance, significant cost reduction, government regulations, and energy savings.

Other applications contributing to the advancement of dc power include common consumer electronics devices, which operate on dc power and require conversion from dc sources. These devices are common in every household and include televisions, computers, set top boxes and many others. (All microprocessors require direct current and many devices operate on direct power because it can be precisely regulated for sensitive components.) In fact, many of the smaller electronic devices such as mobile phones, notebook computers and personal digital assistants (PDAs) use ac-dc adapters, which also result in power loss during conversion. In aggregate, the millions of ac-dc conversions performed for the operation of these electronic devices extract a huge loss in energy during conversion.

In addition to the applications and trends driving the industry, the market for dc power is strongly influenced by a number of technological and regulatory factors. These factors vary from application to application and represent both opportunities and threats. They include the growth of dc power used in alternative energy systems, the availability of UL rated equipment and experienced personnel, the further development of both UPS technology, the expansion and development of a number of organizations and alliances the already-mentioned importance of increased efficiency and the further development of regulatory standards and policies.

Among the areas examined in this report are the technology and architecture trends affecting the industry, as well as a thorough discussion of new and emerging products and materials, potential threats and the latest regulatory developments and standards. Over 35 tables are presented depicting a variety of power system schematics and comparisons, architectural standards, product introductions, packaging solutions, efficiency standards and other relevant information. The focus of this comprehensive analysis provides decision makers with an insightful look into the current and future opportunities and threats available in the dc building power supply market.

Topics Covered :

Current Areas of Development
Additional Applications and Drivers of DC Power
Organizations and Alliances Involved in DC Power
DC Power and Alternative Energy Systems
Barriers, Challenges and Threats to the Adoption of DC Power
Architectural and Technology Trends and Developments
Cost Dynamics of DC Power
Policy and Regulatory Framework for Development
Recent Developments and Products

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