Product Announcement from Power Standards Testing Lab

Date: April 3, 2000

Contact:
	Alex McEachern
	President
	Power Standards Testing Lab
	++1-510-596-1718
	FAX ++1-510-655-3902
	e-mail: Alex@PowerStandards.com
	http://www.PowerStandards.com


Head: Want to Improve Power Quality?  First, Make It Worse.

Ninety percent of power quality problems are caused by voltage sags, according to the 
Electric Power Research Institute.  You can try to improve the situation with filters, 
regulators, and UPS systems, but Alex McEachern says there's a much cheaper approach: 
redesign sensitive loads to tolerate real-world power.

McEachern, a well-known power quality industry expert who represents the United States 
on power quality measurement issues at the IEC, suggests that equipment designers evaluate 
their work with his company's new voltage sag generator. 

The new instrument creates precise, repeatable voltage sags for single-phase and 
three-phase power at up to 50 amps and 480 volts.  It has a built-in 14-channel data 
acquisition system for measuring voltages up to 1000 volts, and currents up to 150 amps, 
that works in a burst mode, capturing internal and external signals before, during, and 
after a sag.

"It's pretty easy to make a minor adjustment to a shut-down circuit, or add a little more 
capacitance to a supply," says McEachern.  "Minor changes like these can take a piece of 
equipment from collapsing at the slightest AC power sag to tolerating just about anything 
that's out there."

The semiconductor industry association SEMI has just published a voltage sag immunity 
standard for semiconductor fabrication equipment, and the new F47-480V-50A Sag Generator 
is optimized for its specifications. The new sag generator can be used with any 
process-control equipment.

Manual and automatic controls on the U.L.-listed instrument make sag testing quick, 
easy, and safe.

For more information, and additional photographs, see http://www.PowerStandards.com, and 
click on the "What's new" link at the upper left corner.

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