Jim, all the power supplies I design are capible of riding through the EN1000-4-5 surge. I would class this as Cat A. Cat B would be if the power supply momentarally ( literally this could imply once the surge has gone ) dropped out, and came back right away on its own. I would expect to see none of the input surge passed through for either Cat A or Cat B. What you describe is Cat C, where something has to be done to get the EUT working again.
Derek Walton Jim Hulbert wrote: > A product has a switched mode power supply with a current sensing circuit that > causes the supply to shut down when a surge pulse is applied to the AC mains > in > accordance with EN61000-4-5/IEC1000-4-5. After about 10 minutes, the supply > can > be turned back on and normal operation of the product can be resumed by the > operator. Does this product conform to criterion B of the EN 50082-1 or EN > 55024 standards? I believe it does because the sensing circuit is > specifically > designed to protect the product against this kind of voltage/current surge and > the product operation is fully recoverable by the operator afterward. > However, > I would like to hear how others who do this testing would interpret this. > > Jim Hulbert > Senior Engineer - EMC > Pitney Bowes > > --------- > This message is coming from the emc-pstc discussion list. > To cancel your subscription, send mail to majord...@ieee.org > with the single line: "unsubscribe emc-pstc" (without the > quotes). For help, send mail to ed.pr...@cubic.com, > jim_bac...@monarch.com, ri...@sdd.hp.com, or > roger.volgst...@compaq.com (the list administrators). --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
