Ged, After a little research, I found some history of the CBEMA/ITIC curve. This was developed by the CBEMA's ESC-3 Working group to provide information for the IEEE STD 446 (Orange Book). Within the Orange Book, I have the 1987 edition so there may be some changes, section 3.11 - Data Processing - looks at the tolerance of voltages for ITE equipment. There is additional reference to IEEE C84.1, which looks at numerous different types of power systems.
I hope that this helps. Thanks, Bryan. From: [email protected] [mailto:[email protected]] Sent: Friday, June 13, 2003 8:29 AM To: [email protected] Subject: CBEMA/ITI curves I am interested in the CBEMA curves for susceptibilty of electronic devices to power supply voltage variations/disturbances. I have found by internet search the original CBEMA curves - which I believe were published in a US Standard FIPS-94 (1983) - and the revised CBEMA/ITI curves circa 2000. These curves are based upon 120V/60Hz power supply; can anyone advise whether similar curves have been produced for 230V/50Hz supplies, or how the applicabiilty of the orginal 120V/60Hz curves may be compromised when considering supply at 230V/50Hz? Also, the 120V/60Hz curves appear to be widely quoted but any limiting assumptions made in their production rarely discussed - can anybody advise, or point me in the direction of more background information? Many thanks, Ged Dean, Nottingham City Hospital ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. NCHT ********************************************************************** 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: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc 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: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
