Power to the People

Higher Efficiency Demands Drive Power Supply Advances

1 of 3 < 1 | 2 | 3 View on one page

More efficient power supply designs could save an estimated 15-20% of the more than 207 billion kWh of energy that flow through power supplies in the U.S. each year, according to the Electric Power Research Institute (www.efficientpowersupplies.org) in Palo Alto, Calif. Hence, industrial customers are demanding ever-increasing energy-saving advances in their power supplies—not only from efficiency gains, but from other technologies as well.

Key on customers' wish lists are energy efficiency, reliability, flexibility and expandability, says Jim Hall, marketing manager at Staco Energy Products (www.stacoenergy.com). Staco's latest product provides up to 98% efficiency, continuous availability, expandability, and hot-swap capability.

David Norton, vice president of marketing at TDK-Lambda Americas (www.us.tdk-lambda.com), says a Power Management Bus (PMBus), an open-standard protocol that facilitates communication with power converters and other devices in a power system, enables customers to remotely monitor the status of the power supply and make adjustments remotely to the supply’s operation. "This addresses the need for 'load shedding,' where during low system power demands, one or more parallel connected power supplies can be turned off to conserve energy,” Norton explains.

 Industrial Power To Power and Beyond
Infinity power supplies provide the tighter output voltage regulation, and lower output ripple advantages of linear regulation technology. Line and load regulation for many models is 2 mV, and ripple less than 0.25 mVrms, 0.75 mVp-p with virtually no common mode noise. Standard models are available with outputs to 150 V and 150 W, with both slot output voltage ranges and wide-adjust models.
 Industrial Power Switched-Mode Power
RNB130 primary switched-mode power supply for field instruments includes a 1.2-in.-wide housing and input 100-240 Vac nominal voltage with connection to mono-phased ac networks or to two-phase conductors of three-phase supply networks. Output is 24 Vdc, with 30 V maximum in the event of a fault. Power reserve includes a power boost of up to 2 A.
 Industrial Power Passive Power
Passive PoE power injectors have 2- and 3-wire input versions, output 56 Vdc and meet Energy Star EPS Version 2.0 and Ecodesign (ErP) Directive 2009/125/EC Level 2 Annex 1b. The 60 W midspans are available with optional Gigabit BaseT data rates and have over-voltage, over-current and short-circuit protection, and UL and CE safety approval markings.
 Industrial Power

Supervise the Load
Mico 4.4.10 actuator-sensor monitors and indicates current ratings for 24 Vdc branch circuits, and handles capacitive loads to 30,000 µF. It has two channels to supervise actuators and two for sensors. The right channels are adjustable 4-10 A; the left channels are adjustable 1-4 A. Input from a single source is separated into two or four circuits, and a local LED warning can send a remote signal to a PLC.

 Industrial Power

Brushless Power
Power supplies with 72-85 V output are for use with dc brushless motors. The output is protected to prevent failures due to over-voltage generated by motors during rotation and freewheeling. The reserve capacity allows these units to operate at 20% higher power levels at 45 ºC without exceeding standard temperature limits. Available in single- or three-phase with 3.1, 6.6 or 13.3 A output, short-circuit, overload and over-temperature protection are standard for heavy startup load.

 Industrial Power

Load Monitor
Overload current control LOCC-Box provides load monitoring and protection in 24 Vdc circuits with adjustable trip current range (1-10 A), adjustable response characteristics, output alarm signal at 90% of load setting, and remote reset and remote on/off functions. No derating required as it functions independently of ambient temperature. Gateway communications for remote monitoring are possible.

 Industrial Power

More Power
With 40 A output at 24 Vdc, Quint SFB industrial-grade power supply has selective fuse-breaking technology for supplemental branch circuit protection on the dc bus. On sensing a fault condition, the SFB technology delivers a short peak of current, up to six times nominal current, to the faulted load. It has diagnostic feedback elements and offers early warning diagnostics through a local PowerBoost yellow LED and PowerBoost dry contact.

1 of 3 < 1 | 2 | 3 View on one page
Show Comments
Hide Comments

Join the discussion

We welcome your thoughtful comments.
All comments will display your user name.

Want to participate in the discussion?

Register for free

Log in for complete access.


No one has commented on this page yet.

RSS feed for comments on this page | RSS feed for all comments