A clear understanding of OSHA safety requirements and the objectives of the NRTL program can render the testing and approval process easier for electronics manufacturers. Regan Arndt, TÜV SÜD America, San Diego, California, USA INTRODUCTION The Occupational Safety and Health Administration (OSHA), an arm of the U.S. Department of Labor, is the primary federal agency … [Read more...]
Voltage Sag Testing for Industrial Equipment—and a New Power Quality Measurement Technology
An electrical product should be able to ride through any regular voltage sag. Andreas Eberhard, Power Standards Labs, Alameda, California, USA Immunity from voltage sags is vital for reliable operation of our ever-more-sophisticated electronic controls and equipment. Every electrical product should be able to ride through typical voltage sags, but in many cases the first sag … [Read more...]
Regulatory Agencies Upping Enforcement Actions
The FCC carries out random audits of products that have received recent TCB grants. David A. Case NCE, NCT, Cisco, Richfield, Ohio, USA The question that occasionally comes up, generally from someone not familiar with compliance, goes something like, “What will the Federal Communications Commission do to us if we are non-compliant, or how will the agency know?” Both questions … [Read more...]
Case Studies of EMI Elimination and Ground Noise Reduction Using Ground Noise Filters
The effective utilization of power line and ground filters can solve complex EMI problems. Philip F. Keebler and Kermit O. Phipps, EPRI Electromagnetic Compatibility Laboratory, Knoxville, Tennnessee, USA INTRODUCTION With today’s increasing number of electromagnetic interference (EMI) problems, new types of solutions are needed to continue providing compatibility between … [Read more...]
Increasing Design Flexibility for Board-Level Shielding
Today's consumers want electronic devices in all shapes and sizes, a demand that can dictate the enclosure design and board shape. David P. Donaldson, Applications Engineer, W.L. Gore & Associates, Inc., Newark, DE, USA As electronic devices are getting smaller and as consumers are demanding more features, designing printed circuit boards (PCBs) is becoming increasingly … [Read more...]
FCC: Mike to Cost Manufacturer
The Federal Communications Commission (FCC) has issued a “Notice of Apparent Liability for Forfeiture” to Sennheiser Electronic Corporation for its willful and continued violation of the Communications Act of 1934. The forfeiture in the amount of $7000 arises from the company’s marketing of “unauthorized radio frequency devices”—in this case portable wireless microphones … [Read more...]
Urban WiFi Interference
British telecom regulator Ofcom has commissioned a report that concludes that WiFi performance in central London can be up to four times slower than that found in less densely populated areas. Although users of WiFi have blamed nearby networks for much of the interference in the 2.4-GHz WiFi band, the authors of the report pin the primary sources of interference on cautious … [Read more...]
New Standard on Limitation of Harmonics Going into Public Power Supplies
IEC 61000-3-2:2005+A1:2008+A2:2009 is entitled “Electromagnetic compatibility (EMC) – Part 3-2: Limits for harmonic current emissions (equipment input current ≤ 16 A per phase). This standard deals with the limitation of harmonic currents injected into the public supply system. It specifies the limits of harmonic components of the input current that may be produced by equipment … [Read more...]
First Offshore Wind Farm in U.S. Approved
The federal government approved Wednesday the nation’s first offshore wind farm off the coast of Cape Cod, after nine years of regulatory review. The 130 Cape Wind turbines would lie in Nantucket Sound, about five miles from the nearest shoreline, and cover 24 square miles. The tip of the highest blade of each turbine would reach 440 feet above the water. While supporters say … [Read more...]
EMC 2009 Social Events – Awards Luncheon
Come join the EMC 2009 Committee in celebrating and recognizing the achievements of our colleagues and in showing our gratitude and appreciation for giving the EMC Society a brighter future. Many awards will be presented, including the Best Student Paper Award and the Best Symposium Paper Award. … [Read more...]
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