Motors and Drives
In the design of the U.K. Government’s new Home Office headquarters, an effective, well-designed smoke-control system was essential, being that each of the facility’s three buildings contained full-sized atria. Specified by an M/E team from Flack + Kurtz, U.K., fans are connected to each of the atria roof plenums with a capability of extracting a total volume of air equivalent to four air changes per hr. in the atrium and a single largest floor. The uppermost two levels of offices in each building are separated from the atrium via full height glazing to create a smoke reservoir in the atrium.
• The National Electrical Manufacturers Association recently released state-level shipment data on its NEMA Premium program, which demonstrates a significant increase in each of the six reported categories. The data show that in 2001-2002 the total net units shipped went up approximately 30%. In 2002-2003 there was a 14% increase over the previous years, suggesting a growing demand for premium-efficiency motors. • Carrier Corporation, Farmington, Conn., and New Berlin, Wis.-based ABB, Inc.
This month's special report "Going Abroad," p. 36, addresses the trend of many U.S. M/E/P engineering firms pursuing overseas opportunities in the manufacturing sector. Ft. Smith, Ark.-based motor and drives manufacturer Baldor is no exception. In fact, according to Randy Breaux, the company's director of marketing, Baldor exports nearly $10 million worth of product to China alone.
Surge suppressors are rated by their single-pulse, maximum surge current per mode. However, a number of other criteria should be considered, such as how they respond to the various ANSI/IEEE waves and the relative let-through current resulting from each of the waves—i.e., B3, B3/C1 combination wave and C3.
Proponents of the BACnet open communications standard received some good news recently, as two major international HVAC and controls manufacturers announced they are committing to the protocol as their primary vehicle of interoperability. ABB's Low-Voltage Drives division announced BACnet is now available as a loadable option in the company's all-new drive for HVAC, ACH550 DriveIT Low Voltage A...
Motor failures can be a mystery, especially when their causes originate outside a facility's walls. That's the conundrum that faced a small motor shop recently, when a spate of failures sparked an investigation of the seemingly random breakdowns. The machinists called for assistance from the motor-rewind shop that had been repairing the failed models—a not-unusual resource for those facin...
Fans and blowers are the workhorses of building mechanical systems. But while they may not exactly be the most glamorous equipment, surprisingly, this equipment is often the focus of continuing research and development. Presented here are not only some recent innovations in fan and blower products, but also some useful new specifying tools for fans and blowers.
New attendance records were set at the 2004 AHR Expo in Anaheim, at least for a West Coast show. With more than 22,000 registered visitors—not including exhibitor personnel—the '04 event set a new record, while the number of exhibiting companies (1,652), and net sq. ft. of exhibit space (324,590) also topped previous West Coast records.
Sometime in the early or mid-'70s I was sitting in my dentist's office looking at MotorTrend or some such magazine, reading an article that showed some concepts of what the future Corvette might look like. At the time, the current model was the Stingray, which I thought was a very cool car. Looking at those prototype renderings, however, I thought, "What dope came up with this idea?" Several ye...
Even the best designed and installed camera system is nothing more than a security tactic or tool that should help answer the question: What is the owner interested in protecting?For example, when trying to protect the exterior building perimeter, parking lots, utility connections and other outdoor items, exterior cameras must be used.