A new space grade series of capacitors from KEMET Corporation has been crafted especially for use by military/aerospace customers in high-reliability applications. These capacitors meet the requirements for MIL-PRF-55365 as well as MIL-STD 1580. These devices incorporate an intensive testing and screening protocol that can be customized to meet the specific needs of an … [Read more...]
Surge Protection Firm Joins Innovation Network for Warfighter Systems
Transtector Systems has joined the EDGE? Innovation Network, a collaborative, open-environment initiative that allows industry, academia, and government to work together so as to enhance the delivery of technology and innovation to the warfighter. Sponsored by General Dynamics C4 Systems and located in Scottsdale, AZ, the EDGE provides facilities and labs for developing and … [Read more...]
Project IEC 61643-21 am1 Ed.1.0 Covers Performance & Test Methods for LV Surge Protectors
The International Electrotechnical Commission has published the draft of an amendment covering low voltage surge protection devices. The proposed change is titled "Amendment 1 - Low voltage surge protection devices - Performance requirements and testing methods."? This final draft has a voting period February 2, 2008 to April 11, 2008. Purchasers of this draft edition will … [Read more...]
Revision F of DO-160 Issued
DO-160F: Environmental Conditions & Test Procedures for Airborne Equipment was issued on December 6. 2007 and was prepared by RTCA Special Committee 135. This document provides standard procedures and environmental test criteria for testing airborne equipment for the entire spectrum of aircraft from light general aviation aircraft and helicopters through the "Jumbo Jets" … [Read more...]
Voltage Sag Testing for Commercial and Industrial Equipment
The ultimate goal for any product manufacturer is to make its product immune to voltage sags. Andreas Eberhard, Power Standards Lab Alameda, CA Modern equipment can be sensitive to brief disturbances on the AC power mains. Unfortunately, electrical systems are subject to a wide variety of power quality problems that can result in interruption of the production process, damage … [Read more...]
PPM Becomes UK Distributors for Group 3 Technology, New Zealand
PPM Ltd has been appointed the exclusive UK Distributor for Group 3 Technology in New Zealand. These products allow a low cost point-to-point link for analog and digital information. A suite of software drivers for use with LabView, or other control software packages are also available, allowing users to drive and read back information with almost any type of transducer. This … [Read more...]
Power Quality Effects on the Reliability and Susceptibility of EMI Filters
EMI filter performance plays a critical role in limiting emissions and also impacts the immunity of end-use equipment to electrical disturbances. Philip F. Keebler and Kermit O. Phipps EPRI, Knoxville, Tenn., USA Today, electronic equipment is commonplace in every residential, commercial, and industrial environment. Moreover, this equipment depends on increasingly complex … [Read more...]
Distinguishing between Surge- and Temporary Overvoltage-Related Failures of Metal Oxide Varistors in End-Use Equipment Designs
Equipment failure resulting from TOVs can be reduced by proper coordination of the line fuse and MOV. Philip F. Keebler, Kermit O. Phipps and Doni Nastasi EPRI Solutions Knoxville, Texas, USA Real world electrical environments in residential, commercial, and industrial facilities experience the gamut of undervoltage and overvoltage disturbances. Examples of undervoltage … [Read more...]
Optimized Lightning Protection for Higher Frequencies
George M. Kauffman, P.E. Frequencies above 4.5 GHz are being used in greater number for a wide range of outdoor communications. These uses include critical infrastructure applications where long lifetime and high availability requirements are paramount. In outdoor antenna applications, the exposure to lightning effects must be considered in most locations. When cables … [Read more...]
Reducing High Frequency Ground Currents to Zero
Patented system solution provides a more effective grounding method. Mark Panko Zero Ground LCC, Waukegan, IL, USA Technology and the electrical/electronics industry have changed at a dizzying pace. Among these many changes is the growing use of motors with adjustable speed drives (ASDs) or variable frequency drives (VFDs). An unforeseen consequence of using these efficient … [Read more...]
