In the article, “Don’t let power sags stop your motors” ( PE , September 1999, p 76, File 0550/8550), there is an error in Fig. 5. The two horizontal lines from the dc coil (M symbol) should not be there. The dc coil should only have two vertical lines.
We inadvertently listed the wrong web site for Fluor Global Services (November 1999, p 74). The correct address for TabWare OnLine is www. tabware.com.
In the November 1999 Web Update column, the web site for Advanced Energy was listed incorrectly. The address is www.advancedenergy. org.