You're welcome, John. Yes, the test seems brutal. In North America, ringing is maximum 105Vrms, possibly riding on up to a -56.5Vdc wetted line (but not necessarily) and is limited to a few tens of mA. 120V/1200Ohms is still only 100mA, but that doesn't mean it won't cause grief at 3-5 times the US ringing current.
However, the specification is for that source, IF there isn't one available to simulate the actual network. Sort of a poor man's networks simulator. Regards, Peter L. Tarver, PE Product Safety Manager Sanmina-SCI Homologation Services 2000 Ringwood Ave. San Jose, CA 95131-1749 V: 408-904-2081 F: 408-904-2095 M: 408-234-3529 [email protected] > From: John Allen > Sent: Thursday, December 12, 2002 8:18 AM > > Peter > > Thanks for that - quite a different background to > how it seemed to read to > me! > > But in that case it does seem a bit of a "brutal" > test to apply to guard > against a hazard caused solely by a > telecomms-circuit source - surely a > relatively low power source would be appropriate? > > Any idea why they did not more closely specify > the equipment to be used? > > Regards > > Johh Allen > ------------------------------------------- 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] All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
