Electronics Protection - June/July 2012 - (Page 22)
Control Switch Relay Allows Time Delayed Trip/ Close for Added ARC Flash Safety
A new time delay control switch relay (TD-CSR) from Electroswitch provides a means of mitigating arc flash danger in local circuit breaker operation by allowing for a manually initiated timedelayed trip or close. A flashing LED notifies the operator of the pending trip or close operation and serves as a warning to evacuate the arc flash area. By allowing an operator time to leave and be outside the room during the trip or close operation, the TD-CSR provides an added measure of safety against arc flash danger. Once a local trip or close is initiated, the 10-second delay allows an operator time to cancel the pending operation. To avoid any chance of an inadvertent operation, the control pushbuttons must be depressed for four continuous seconds to activate the 10-second delay. Other delay time options are available. The unit’s pushbutton design simplifies personnel training. No special wiring is required for installation. Reliable, self-cleaning, double-wiping contacts with silver or silver-alloy surfaces provide very low contact resistance for lowlevel control applications. Rugged, standard screw-type terminals have a 30 A/600 V continuous-current rating. The TD-CSR meets the same IEEE C37.90 series standards as all other Electroswitch relay products, confirmed by periodic in-house testing. the rack enables overall efficiency to be enhanced by eliminating the need for a voltage conversion along the power path. It also yields additional energy savings at the device-level in the form of increased efficiency for server power supplies, which can handle a wide range of incoming voltages. With the delivery of higher voltage comes the risk of increased current overload and fault conditions. All Liebert MPX and Liebert MPH rack PDU systems carry a 65k AIC withstand rating from UL, ensuring a resilient, high-availability design supporting the high voltage currents in 415 V applications. Both Liebert MPX and Liebert MPH operate at an operating temperature up to 131°F, ensuring proper operation of the rack PDU despite elevated temperatures found at the back of the IT equipment rack, especially in higher density environments.
Abbott Technologies Offers Environmentally Sealed Power Supply
New UMF 250 Quick-Acting SMD Fuse
Schurter has expanded its line of surface-mount fuses with the introduction of the universal modular fuse, UMF 250. Its quick-acting characteristic according to IEC 60127-4 complements the successful UMT series, in providing overcurrent and short circuit protection for electronic systems in primary and secondary circuits. Current ratings up to 10 A at 250 VAC/125 VDC, the UMF 250 has a breaking capacity of up to 200 A at rated voltage. The UMF 250 provides maximum circuit protection while its compact size saves PCB space over larger cartridge style fuses and facilitates assembly with pick and place mounting.
Abbott Technologies has added a new 500 watt AC-DC model to its power supply product line. The new product, designated CM500, is fully sealed to meet IP65/67 standards and can handle humidity to 100 percent. Abbott CM500 power supplies can be specified with single phase inputs ranging from 95 to 260 VAC at line frequencies from 47 to 880 Hz. All input sections include built-in power factor correction, meet MIL-STD-1399 Section 300 requirements for spike voltage testing and provide line regulation of ±1 percent. Output voltage can be specified from 12 to 48 VDC, and achieve load regulation of ±1 percent from no load to full load. Operating temperature range is -40°C to 80°C base plate with no power derating, while ripple and noise are less than 2 percent peak-to-peak over a 20 MHz bandwidth. Efficiency is better than 85 percent. Each unit offers a range of features. These include short circuit protection with current limiting, in-rush current limiting, remote error sensing and built-in test. Electromagnetic compatibility meets the CE101 and CE102 requirements of MIL-STD-461D. All versions meet MIL-S-901 shock specifications and MIL-STD-167 vibration specs.
New Four-Port Gas Tube Lightning Protectors Protect Cat 6 Lines
Emerson Network Power Adds 415 V Capability To Liebert Rack Power Distribution Units
Emerson Network Power has introduced 415-volt input configurations for its Liebert MPX and Liebert MPH rack PDUs, to enable the distribution of higher voltage power to IT equipment, thereby increasing efficiency in the power distribution system. All voltages of both technologies also feature a 65kAIC withstand rating for ensured reliability and safety under extreme utility conditions, In North America, 480 V is the most common distribution voltage found in data centers. However, this voltage must be converted to a lower voltage (208 V/120 V) in order to be distributed to the IT equipment. A step-down from 480 V to 208 V in the traditional power distribution architecture introduces efficiency losses, which can be minimized by adopting a 415 V input/240 V output distribution model. Delivering this increased voltage to
L-com, Inc. has introduced two new gas tube lightning protectors designed to protect up to four Category 6 Ethernet cable lines. Designed to stop transient voltages or power spikes from damaging sensitive electronic equipment, these wall/shelfmount and rack-mount models offer better protection than the diode versions that L-com has carried since 2009. L-com’s earlier models of four-port Cat 6 lightning protectors used ultra-low capacitance diodes to stop spikes of up to 65 volts. The new models use gas discharge tubes to provide low line-toline and line-to-ground capacitance, minimizing distortion of highspeed signals. They stop spikes up to 90 volts and have L-com’s highest power rating available. The new parts are also compatible with 802.3af/at PoE devices.
June/July 2012 www.ElectronicsProtectionMagazine.com
Table of Contents for the Digital Edition of Electronics Protection - June/July 2012
Electronics Protection - June/July 2012
FLIR T-series Cameras Introduce Thermal Image Enhancement Technology
Renewable Raw Materials - The Future of Plastic Enclosures
Global Electronic Enclosure Resins and Markets
Ferrite Testing Reveals Significant Performance Variations
Packaging Solutions for Critical Electronics Protection in Challenging Environments
Fluid Submersion Technology for Green Data Center Cooling
TRTL BOT Unveils KidSafe Case for iPhone 4 and 4S
Curtiss-Wright Controls Defense Solution Releases New D2D ATR 3U OpenVPX Chassis
Stulz Introduces CyberRow Data Center Cooling Solution
Abbott Technologies Offers New Sealed Power Supply
New Engineered Multi-Cavity Shielding Solution
Gore Enhances Product Performance with new of Screw-in Vents
Calendar of Events
Electronics Protection - June/July 2012