-----Original Message----- From: Jody Leber [SMTP:jle...@ustech-lab.com] Sent: Tuesday, May 01, 2001 8:28 AM To: 'Peter Merguerian'; "EMC-PSTC (E-mail)" < Subject: RE: DC/DC Convertors for CO Equipment
To all, The SELV output was based on US requirements with a nominal 48 Vdc up to a maximum of 60 Vdc. This information is from Clause 3.6 of UL 60950. If the voltage were greater than 60 Vdc and not exceeding 80 Vdc the circuit would be TNV-2. Above 80 Vdc would be a hazardous voltage secondary. I am not certain of the global requirements. I do know that at least one NRTL considers US centralized DC SELV by indicating the dc source is isolated from the ac source and grounded. A task group was formed by UL to address the concerns of this section. Would any of the members of this task group please provide some feedback for the masses. Best Regards, Jody Leber Laboratory Manager jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 -----Original Message----- From: Peter Merguerian [SMTP:pmerguer...@itl.co.il] Sent: Tuesday, May 01, 2001 7:22 AM To: "EMC-PSTC (E-mail)" < Subject: DC/DC Converters for CO Equipment << File: ATT00009.txt; charset = windows-1255 >> ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on "Virtual Conference Hall,"
