Project IEC 62271-204 ed1.0, High-voltage switchgear and controlgear – Part 204: Rigid gas-insulated transmission lines for rated voltage above 52 kV, is an up to 3 months pre-release of the official publication. This part of IEC 62271 applies to rigid HV gas-insulated transmission lines (GIL) in which the insulation is obtained, at least partly, by a non-corrosive insulating … [Read more...]
Commercial Development of Nano-based Products Moves Ahead
Nanocomposites research and the massive benefits it promises have attracted considerable press coverage over the past decade. Actual commercial development of nano-based products for composites, however, has been slow. But a new partnership between Applied NanoStructured Solutions LLC, a Lockheed Martin subsidiary, and Owens Corning is about to accelerate growth. ANS has worked … [Read more...]
Project to Study Carbon Nanotubes Impact on Electrical Conductivity in Composite Materials
Australian materials company, Quickstep Holdings is collaborating in a European program to study the use of nanotechnology in enhancing the properties of composites deployed in the transportation sector. The project is being undertaken by the company’s German subsidiary, Quickstep. It will research the introduction of carbon nanotubes into host composites that could enhance … [Read more...]
Electromagnetic Interference Sources and Their Most Significant Effects
As the density of the electromagnetic environment continues to increase, the concern about its effects from sources producing EMI also increases. Advances in technology and the number of products produced are having a significant effect on the efforts aimed at maintaining the required operation and interoperability of products and systems used in our society. These events had … [Read more...]
Accurate Feedthrough Capacitor Measurements at High Frequencies Critical for Component Evaluation and High Current Design
The shunt capacitor is the critical element in almost all low pass filters. Feed-through capacitors are configured as a center electrode passing through a grounded housing, which contains the desired capacitance from the electrode to the grounded housing, and practically eliminates lead inductance. This article will explain the importance of feedthrough capacitors, and provide … [Read more...]
A Risk Assessment for Lightning Protection System (LPS)
Bryan Cole, Technology Research Council, Nichols, New York, USA Many articles, papers, and standards have been written and/or developed documenting proper application of surge protection devices (SPDs), identification of SPD performance characteristics, proper SPD safety requirements, etc. However, there are minimal articles on describing when an engineer should specify SPDs … [Read more...]
Going from Analog to Digital
Philip F. Keebler, EMC Group, Electric Power Research Institute, Knoxville, Tennessee USA; Stephen Berger, TEM Consulting, LLC, Georgetown, Texas USA Nuclear power plants (NPPs) in the United States have been undergoing upgrades from analog instrumentation and control (I&C) equipment to digital equipment over the past several years. Upgrades have been occurring on the … [Read more...]
High Power Electromagnetic (HPEM) Threats to the Smart Grid
This paper is focused on the threats and impacts of High Power Electromagnetic (HPEM) environments on the U.S. Power Grid and further introduces the implications of making the power grid “smarter” through the introduction of additional electronics. These Smart Grid electronics may introduce additional vulnerabilities if the grid is exposed to the high power EM threats of … [Read more...]
Troubleshooting Radiated Emissions Using Low-Cost Bench-Top Methods
Kenneth Wyatt Wyatt Technical Services LLC Editor's Note: Click on the pdf icon at left for a printable copy of this article. Because time-to-market and budget factors often drive many of today’s high-tech designs, electromagnetic compatibility (EMC) issues often surface at the last moment in the design cycle, potentially delaying product introductions. Very often, simple … [Read more...]
New EMC Requirements for Commercial Avionics: RTCA/DO-160G
Erik J. Borgstrom, Environ Laboratories LLC, Bloomington, Minnesota, US OVERVIEW RTCA/DO-160G, Environmental Conditions and Test Procedures for Airborne Equipment, prepared by RTCA Special Committee 135, was issued on December 8, 2010, superseding the previous version, DO-160F [1]. DO-160G covers standard procedures and environmental test criteria for testing airborne … [Read more...]
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